Texas Instruments | DS90UB929-Q1 720p HDMI to FPD-Link III bridge serializer (Rev. B) | Datasheet | Texas Instruments DS90UB929-Q1 720p HDMI to FPD-Link III bridge serializer (Rev. B) Datasheet

Texas Instruments DS90UB929-Q1 720p HDMI to FPD-Link III bridge serializer (Rev. B) Datasheet
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DS90UB929-Q1
SNLS457B – NOVEMBER 2014 – REVISED AUGUST 2019
DS90UB929-Q1 720p HDMI to FPD-Link III bridge serializer
1 Features
3 Description
•
The DS90UB929-Q1 is an HDMI to FPD-Link III
bridge device which, in conjunction with the FPD-Link
III DS90UB926Q-Q1/DS90UB928Q-Q1 deserializers,
supplies 1-lane high-speed serial stream over costeffective 50-Ω single-ended coaxial or 100-Ω
differential shielded twisted-pair (STP) cable. It
serializes an HDMI v1.4b input supporting video
resolutions up to WXGA and 720p with 24-bit color
depth. The DS90UB929-Q1 is also compatible with
the DS90UB940-Q1/DS90UB948-Q1 deserializers.
1
•
•
•
•
•
•
•
•
•
AEC-Q100 qualified for automotive applications
– Device temperature grade 2: –40°C to +105°C,
TA
Supports TMDS clock up to 96 MHz for WXGA
and 720p60 or 1080i60 resolutions with 24-bit
color depth
FPD-Link III outputs
High-definition multimedia (HDMI) v1.4b inputs
HDMI-mode DisplayPort (DP++) inputs
HDMI audio extraction for up to 8 channels
Supports up to 15 meters of cable with automatic
temperature and aging compensation
Monitors spread-spectrum input clock to reduce
EMI
I2C (master/slave) with 1-Mbps fast-mode plus
Compatible with DS90UB926Q-Q1 and
DS90UB928Q-Q1 FPD-Link III deserializers
2 Applications
•
•
•
Automotive infotainment:
– IVI head units and HMI modules
– Rear seat entertainment systems
– Digital instrument clusters
Surveillance cameras
Consumer input HDMI port
The FPD-Link III interface supports video and audio
data transmission and full duplex control, including
I2C communication, over the same differential link.
The consolidation of video data and control over one
differential pair can reduce the interconnect size and
weight and can simplify system design. EMI is
minimized by the use of low-voltage differential
signaling, data scrambling, and randomization.
The DS90UB929-Q1 supports multi-channel audio
received through HDMI or an external I2S interface.
The device also supplies an optional auxiliary audio
interface.
Device Information(1)
PART NUMBER
DS90UB929-Q1
PACKAGE
VQFN (64)
BODY SIZE (NOM)
9.00 mm × 9.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Application Diagram
VDDIO
1.8V
Mobile Device
/Graphics
Processor
TMDS Interface
HDMI
3.3V
1.1V
VDDIO
1.8V or 3.3V
RIN-
R[7:0]
G[7:0]
B[7:0]
HS
VS
DE
PCLK
DS90UB926Q-Q1
Deserializer
LOCK
PASS
FPD-Link III
1 Pair / AC Coupled
IN_CLK+
IN_D0+
DOUT+
IN_D1+
IN_D2+
CEC
DDC
HPD
GPIO
RIN+
DOUTDS90UB929-Q1
Serializer
4
/
PDB
OSS_SEL
OEN
MODE_SEL
3
/
INTB_IN
I2C_SCL
I2C_SDA
IDx
DAP
SCL
SDA
IDx
RGB Display
720p
24-bit color depth
I2S AUDIO
(STEREO)
MCLK
DAP
TMDS ± Transition-Minimized Differential Signaling
HDMI ± High Definition Multimedia Interface
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
DS90UB929-Q1
SNLS457B – NOVEMBER 2014 – REVISED AUGUST 2019
www.ti.com
Table of Contents
1
2
3
4
5
6
Features ..................................................................
Applications ...........................................................
Description .............................................................
Revision History.....................................................
Pin Configuration and Functions .........................
Specifications.........................................................
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
6.10
7
1
1
1
2
3
6
Absolute Maximum Ratings ..................................... 6
ESD Ratings.............................................................. 6
Recommended Operating Conditions....................... 6
Thermal Information .................................................. 7
DC Electrical Characteristics .................................... 7
AC Electrical Characteristics................................... 10
DC And AC Serial Control Bus Characteristics ...... 11
Recommended Timing for the Serial Control Bus .. 12
Timing Diagrams ..................................................... 13
Typical Characteristics .......................................... 15
Detailed Description ............................................ 16
7.1 Overview ................................................................. 16
7.2 Functional Block Diagram ....................................... 16
7.3
7.4
7.5
7.6
8
Feature Description.................................................
Device Functional Modes........................................
Programming...........................................................
Register Maps .........................................................
17
27
28
32
Application and Implementation ........................ 58
8.1 Applications Information.......................................... 58
8.2 Typical Applications ................................................ 58
9
Power Supply Recommendations...................... 63
9.1 Power-Up Requirements and PDB Pin ................... 63
10 Layout................................................................... 67
10.1 Layout Guidelines ................................................. 67
10.2 Layout Example .................................................... 68
11 Device and Documentation Support ................. 69
11.1
11.2
11.3
11.4
11.5
Documentation Support .......................................
Receiving Notification of Documentation Updates
Trademarks ...........................................................
Electrostatic Discharge Caution ............................
Glossary ................................................................
69
69
69
69
69
12 Mechanical, Packaging and Orderable
Information ........................................................... 69
4 Revision History
Changes from Revision A (March 2019) to Revision B
Page
•
Changed VDD11 maximum from 1.32 V back to 1.7 V............................................................................................................. 6
•
Added Receiving Notification of Documentation Updates section ...................................................................................... 69
Changes from Original (November 2014) to Revision A
Page
•
Changed all references of HDMI Clock to TMDS Clock......................................................................................................... 3
•
Changed the VTERM pin description ..................................................................................................................................... 5
•
Changed VDD11 maximum from: 1.7 V to: 1.32 V ................................................................................................................... 6
•
Added RX_5V parameter to the Recommended Operating Conditions ................................................................................. 7
•
Added TCLH1/2 and TCHL1/2 parameters to the Recommended Operating Conditions .............................................................. 7
•
Changed the TMDS jitter specification in the AC Electrical Characteristics table................................................................ 10
•
Added information about using I2S with the DS90UH926-Q1 in the Audio Modes section ................................................. 21
•
Deleted Auto Soft Sleep mode from the MODE_SEL[1:0] Settings table ............................................................................ 27
•
Added Frequency Detection Circuit section ......................................................................................................................... 28
•
Added 5% resistor information to the Serial Control Bus section......................................................................................... 29
•
Added information to Multi-Master Arbitration Support section ............................................................................................ 30
•
Added additional information to register 0x01 ...................................................................................................................... 32
•
Added registers 0x00, 0x13, 0x15, 0x5B, 0xC0, 0xC2, 0xC3, 0xC6, 0xC8, 0xCE, and 0xD0 to default list ....................... 32
•
Changed information about GPIO0 modes x00 and x10 ..................................................................................................... 36
•
Changed information about GPIO1 modes x00 and x10 ..................................................................................................... 36
•
Added reset information to register 0x15 ............................................................................................................................. 40
•
Changed the register 0x1A information ................................................................................................................................ 41
•
Added Registers 0x40, 0x41, and 0x42 ............................................................................................................................... 46
•
Deleted Rev A1 silicon information....................................................................................................................................... 50
•
Added 'Set to 0' test to the 0x5B register description........................................................................................................... 51
2
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DS90UB929-Q1
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SNLS457B – NOVEMBER 2014 – REVISED AUGUST 2019
•
Changed register 0x5C[4:3] information. ............................................................................................................................. 51
•
Added Page 0x10 Register................................................................................................................................................... 57
•
Added Page 0x14 Register................................................................................................................................................... 57
•
Changed graph caption from: 1080p60 Video at 2.6 Gbps Serial Line Rate (One of Two Lanes) to: 720p60 Video at
2.6-Gbps Serial Line Rate, Single Lane FPD-Link III Output ............................................................................................... 62
•
Changed Power-Up Requirements section .......................................................................................................................... 63
5 Pin Configuration and Functions
I2S_DA / GPIO6_REG
I2S_CLK / GPIO8_REG
I2S_WC / GPIO7_REG
35
34
33
I2S_DD / GPIO3
38
I2S_DC / GPIO2
X1
39
I2S_DB / GPIO5_REG
REM_INTB
40
36
VDDL11
41
37
RX_5V
HPD
42
45
DDC_SDA
VDDIO
DDC_SCL
46
43
NC6
47
44
NC7
48
RGC Package
64-Pin VQFN
Top View
IN_CLK-
49
32
MODE_SEL1
IN_CLK+
50
31
PDB
VDD18
51
30
RES2
VDDHA11
52
29
RES1
NC8
53
28
VDDHS11
VDDHA11
54
27
DOUT+
IN_D0-
55
IN_D0+
56
VTERM
57
VDDHA11
58
IN_D1-
59
22
NC4
IN_D1+
60
21
VDDHS11
VDDHA11
61
20
IN_D2-
62
LFT
IDx
IN_D2+
63
18
MODE_SEL0
VDD18
64
17
VDDP11
DS90UB929-Q1
64 VQFN
Top View
7
8
9
10
11
12
13
VDDL11
NC0
VDDA11
NC1
NC2
NC3
INTB
16
6
MCLK
5
SWC / GPIO1
SCLK / I2CSEL
15
4
SDIN / GPIO0
14
3
VDDIO
SCL
2
DOUT-
25
VDDS11
24
VDD18
23
NC5
19
SDA
1
CEC
RES0
DAP = GND
26
Pin Functions
PIN
NAME
NO.
I/O, TYPE
DESCRIPTION
HDMI TMDS INPUT
IN_CLKIN_CLK+
49
50
I, TMDS
TMDS Clock Differential Input
IN_D0IN_D0+
55
56
I, TMDS
TMDS Data Channel 0 Differential Input
IN_D1IN_D1+
59
60
I, TMDS
TMDS Data Channel 1 Differential Input
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SNLS457B – NOVEMBER 2014 – REVISED AUGUST 2019
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Pin Functions (continued)
PIN
I/O, TYPE
DESCRIPTION
NAME
NO.
IN_D2IN_D2+
62
63
I, TMDS
TMDS Data Channel 2 Differential Input
HPD
42
O, OpenDrain
Hot Plug Detect Output. Pull up to RX_5V with a 1-kΩ resistor
RX_5V
43
I
DDC_SDA
44
IO, OpenDrain
DDC_SCL
45
CEC
1
IO, OpenDrain
X1
39
I, LVCMOS
DOUT-
26
O
FPD-Link III Inverting Output
The output must be AC-coupled with a 0.1-µF capacitor for interfacing with 92x deserializers
and 33-nF capacitor for 94x deserializers
DOUT+
27
O
FPD-Link III True Output
The output must be AC-coupled with a 0.1-µF capacitor for interfacing with 92x deserializers
and 33-nF capacitor for 94x deserializers
LFT
20
Analog
SDA
14
IO, OpenDrain
I2C Data Input / Output Interface
Open-drain. Must have an external pullup to resistor to 1.8 V or 3.3 V. See I2CSEL pin. DO
NOT FLOAT.
Recommended pullup: 4.7 kΩ.
SCL
15
IO, OpenDrain
I2C Clock Input / Output Interface
Open-drain. Must have an external pullup resistor to 1.8 V or 3.3 V. See I2CSEL pin. DO
NOT FLOAT.
Recommended pullup: 4.7 kΩ.
I2CSEL
6
I, LVCMOS
IDx
19
Analog
I2C Serial Control Bus Device ID Address Select
MODE_SEL0
18
Analog
Mode Select 0. See Table 4.
MODE_SEL1
32
Analog
Mode Select 1. See Table 4.
PDB
31
I, LVCMOS
Power-Down Mode Input Pin
INTB
13
O, OpenDrain
Open Drain. Remote interrupt. Active LOW.
Pullup to VDDIO with a 4.7-kΩ resistor.
REM_INTB
40
O, OpenDrain
Remote interrupt. Mirrors status of INTB_IN from the deserializer.
Note: External pullup to 1.8 V required. Recommended pullup: 4.7 kΩ.
INTB = H, Normal Operation
INTB = L, Interrupt Request
OTHER HDMI
HDMI 5-V Detect Input
DDC Slave Serial Data
Pullup to RX_5V with a 47-kΩ resistor
I, Open-Drain DDC Slave Serial Clock
Pullup to RX_5V with a 47-kΩ resistor
Consumer Electronic Control Channel Input/Output Interface.
Pullup with a 27-kΩ resistor to 3.3 V
Optional Oscillator Input: This pin is the optional reference clock for CEC. It must be
connected to a 25 MHz 0.1% (1000ppm), 45-55% duty cycle clock source at CMOS-level
1.8 V. Leave it open if unused.
FPD-LINK III SERIAL
FPD-Link III Loop Filter
Connect to a 10-nF capacitor to GND
CONTROL
I2C Voltage Level Strap Option
Tie to VDDIO with a 10-kΩ resistor for 1.8-V I2C operation.
Leave floating for 3.3-V I2C operation.
This pin is read as an input at power up.
BIDIRECTIONAL CONTROL CHANNEL (BCC) GPIO PINS
GPIO0
4
IO, LVCMOS BCC GPIO0. Shared with SDIN
GPIO1
5
IO, LVCMOS BCC GPIO1. Shared with SWC
GPIO2
37
IO, LVCMOS BCC GPIO2. Shared with I2S_DC
GPIO3
38
IO, LVCMOS BCC GPIO3. Shared with I2S_DD
REGISTER-ONLY GPIO
4
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SNLS457B – NOVEMBER 2014 – REVISED AUGUST 2019
Pin Functions (continued)
PIN
NAME
I/O, TYPE
NO.
DESCRIPTION
GPIO5_REG
36
IO, LVCMOS General-Purpose Input/Output 5
Local register control only. Shared with I2S_DB
GPIO6_REG
35
IO, LVCMOS General-Purpose Input/Output 6
Local register control only. Shared with I2S_DA
GPIO7_REG
33
IO, LVCMOS General-Purpose Input/Output 7
Local register control only. Shared with I2S_WC
GPIO8_REG
34
IO, LVCMOS General-Purpose Input/Output 8
Local register control only. Shared with I2S_CLK
SLAVE MODE LOCAL I2S CHANNEL PINS
I2S_WC
33
I, LVCMOS
Slave Mode I2S Word Clock Input. Shared with GPIO7_REG
I2S_CLK
34
I, LVCMOS
Slave Mode I2S Clock Input. Shared with GPIO8_REG
I2S_DA
35
I, LVCMOS
Slave Mode I2S Data Input. Shared with GPIO6_REG
I2S_DB
36
I, LVCMOS
Slave Mode I2S Data Input. Shared with GPIO5_REG
I2S_DC
37
I, LVCMOS
Slave Mode I2S Data Input. Shared with GPIO2
I2S_DD
38
I, LVCMOS
Slave Mode I2S Data Input. Shared with GPIO3
AUXILIARY I2S CHANNEL PINS
SWC
5
O, LVCMOS
Master Mode I2S Word Clock Output. Shared with GPIO1
SCLK
6
O, LVCMOS
Master Mode I2S Clock Output. Shared with I2CSEL. This pin is sampled following powerup as I2CSEL, then it will switch to SCLK operation as an output.
SDIN
4
I, LVCMOS
Master Mode I2S Data Input. Shared with GPIO0
MCLK
16
IO, LVCMOS Master Mode I2S System Clock Input/Output
POWER AND GROUND
VTERM
57
Power
Must be connected to 3.3-V or 1.8-V supply.
Connect to 3.3-V (±5%) Supply if incoming video is DC coupled OR
Connect to 1.8-V (±5%) Supply if incoming video is AC coupled
Refer to Figure 22 or Figure 21.
VDD18
24
51
64
Power
1.8-V (±5%) Analog supply. Refer to Figure 22 or Figure 21.
VDDA11
9
Power
1.1-V (±5%) Analog supply. Refer to Figure 22 or Figure 21.
VDDHA11
52
54
58
61
Power
1.1-V (±5%) TMDS supply. Refer to Figure 22 or Figure 21.
VDDHS11
21
28
Power
1.1-V (±5%) supply. Refer to Figure 22 or Figure 21.
VDDL11
7
41
Power
1.1-V (±5%) Digital supply. Refer to Figure 22 or Figure 21.
VDDP11
17
Power
1.1-V (±5%) PLL supply. Refer to Figure 22 or Figure 21.
VDDS11
25
Power
1.1-V (±5%) Serializer supply. Refer to Figure 22 or Figure 21.
VDDIO
3
46
Power
1.8-V (±5%) IO supply. Refer to Figure 22 or Figure 21.
Thermal
Pad
GND
Ground. Connect to Ground plane with at least 9 vias.
GND
OTHER
RES0
RES1
2
29
Reserved. Tie to GND.
RES2
30
Reserved. Connect with 50Ω to GND.
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Pin Functions (continued)
PIN
NAME
NO.
NC0
NC1
NC2
NC3
NC4
NC5
NC6
NC7
NC8
I/O, TYPE
8
10
11
12
22
23
47
48
53
DESCRIPTION
No connect. Leave floating. Do not connect to VDD or GND.
6 Specifications
6.1 Absolute Maximum Ratings
See
(1) (2)
MIN
MAX
UNIT
VDD11
Supply Voltage
–0.3
1.7
V
VDD18
Supply Voltage
–0.3
2.5
V
VDDIO
Supply Voltage
–0.3
2.5
V
OpenLDI Inputs
–0.3
2.75
V
LVCMOS I/O Voltage
–0.3
VDDIO + 0.3
V
1.8-V Tolerant I/O
–0.3
2.5
V
3.3-V Tolerant I/O
–0.3
4.0
V
5-V Tolerant I/O
–0.3
5.3
V
FPD-Link III Output Voltage
−0.3
1.7
V
150
°C
150
°C
Junction Temperature
Tstg
(1)
(2)
Storage Temperature
–65
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended
Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
For soldering specifications, see product folder at www.ti.com and Absolute Maximum Ratings for Soldering (SNOA549).
6.2 ESD Ratings
VALUE
V(ESD)
Electrostatic discharge
Human body model (HBM), per AEC Q100-002 (1)
HBM ESD Classification Level 2
±2000
Charged device model (CDM), per AEC Q100-011
CDM ESD Classification Level C5
±750
ESD Rating (IEC 61000-4-2)
RD = 330 Ω, CS = 150 pF
ESD Rating (ISO10605)
RD = 330 Ω, CS = 150 pF
RD = 2 kΩ, CS = 150 pF or 330 pF
(1)
Air Discharge (DOUT+,
DOUT-)
±15000
Contact Discharge
(DOUT+, DOUT-)
±8000
Air Discharge (DOUT+,
DOUT-)
±15000
Contact Discharge
(DOUT+, DOUT-)
±8000
UNIT
V
AEC Q100-002 indicates HBM stressing is done in accordance with the ANSI/ESDA/JEDEC JS-001 specification.
6.3 Recommended Operating Conditions
MIN
NOM
MAX
UNIT
VDD11
Supply Voltage
1.045
1.1
1.155
V
VDD18
Supply Voltage
1.71
1.8
1.89
V
VDDIO
LVCMOS Supply Voltage
1.71
1.8
1.89
V
6
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Recommended Operating Conditions (continued)
MIN
NOM
MAX
UNIT
VDDI2C, 1.8-V Operation
1.71
1.8
1.89
V
VDDI2C, 3.3-V Operation
3.135
3.3
3.465
V
HDMI Termination (VTERM), DC-coupled
3.135
3.3
3.465
V
HDMI Termination (VTERM), AC-coupled
1.71
1.8
1.89
V
VRX_5V
HDMI Detect Voltage
4.25
5
5.25
V
TA
Operating Free Air Temperature
−40
25
105
°C
TCLH1
Allowable ending ambient temperature for continuous PLL lock when ambient
temperature is rising under the following condition:
–40°C ≤ starting ambient temperature (Ts) < 0°C. (1)
TS
80
°C
TCLH2
Allowable ending ambient temperature for continuous PLL lock when ambient
temperature is rising under the following condition:
0°C ≤ starting ambient temperature (Ts) ≤ 105°C. (1)
TS
105
°C
TCHL1
Allowable ending ambient temperature for continuous PLL lock when ambient
temperature is falling under the following condition:
45°C < starting ambient temperature (Ts) ≤ 105°C. (1)
25
TS
°C
TCHL2
Allowable ending ambient temperature for continuous PLL lock when ambient
temperature is falling under the following condition:
–20°C ≤ starting ambient temperature (Ts) ≤ 45°C. (1)
TS − 20
TS
°C
25
96
MHz
TMDS Frequency
(1)
The input and output PLLs are calibrated at the ambient start up temperature (TS) when the device is powered on or when reset using
the PDB pin. The PLLs will stay locked up to the specified ending temperature. A more detailed description can be found in “Handling
System Temperature Ramps on the DS90Ux949, DS90Ux929 and DS90Ux947”.
6.4 Thermal Information
DS90UB929-Q1
THERMAL METRIC (1)
RGC (VQFN)
UNIT
64 PINS
RθJA
Junction-to-ambient thermal resistance
25.8
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
11.4
°C/W
RθJB
Junction-to-board thermal resistance
5.1
°C/W
ψJT
Junction-to-top characterization parameter
0.2
°C/W
ψJB
Junction-to-board characterization parameter
5.1
°C/W
RθJC(bot)
Junction-to-case (bottom) thermal resistance
0.8
°C/W
(1)
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report (SPRA953).
6.5 DC Electrical Characteristics
over recommended operating supply and temperature ranges (unless otherwise noted)
PARAMETER
TEST CONDITIONS
PIN/FREQ.
MIN
TYP
MAX
UNIT
1.8-V LVCMOS I/O
VIH
High Level Input
Voltage
VIL
Low Level Input
Voltage
IIN
Input Current
VIN = 0 V or 1.89 V
SCLK/I2CSEL, PDB,
SDIN/GPIO0,
SWC/GPIO1, MCLK
I2S_DC/GPIO2,
I2S_DD/GPIO3,
I2S_DB/GPIO5_REG,
I2S_DA/GPIO6_REG,
I2S_CLK/GPIO8_REG,
I2S_WC/GPIO7_REG
0.65 × VDDIO
V
0
0.35 × VDDIO
V
−10
10
μA
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DC Electrical Characteristics (continued)
over recommended operating supply and temperature ranges (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VOH
High Level Output
Voltage
IOH = −4 mA
VOL
Low Level Output
Voltage
IOL = 4 mA
IOS
Output Short Circuit
Current
VOUT = 0 V
IOZ
TRI-STATE™ Output
VOUT = 0 V or VDDIO, PDB = L
Current
PIN/FREQ.
MIN
TYP
MAX
UNIT
0.7 × VDDIO
VDDIO
V
GND
0.26 × VDDIO
V
Same as above
-50
mA
−10
10
μA
VTERM - 300
VTERM - 37.5
mV
VTERM - 10
VTERM + 10
mV
150
1200
mVP-P
110
Ω
TMDS INPUTS -- FROM HDMI v1.4b SECTION 4.2.5
Input Common-Mode
Voltage
VICM1
VICM2
Input Common-Mode
IN_CLK ≤ 96MHz
Voltage
VIDIFF
Input Differential
Voltage Level
RTMDS
Termination
Resistance
IN_D[2:0]+, IN_D[2:0]IN_CLK+, IN_CLKVTERM = 1.8V (±5%) or
VTERM = 3.3 V (±5%)
IN_D[2:0]+, IN_D[2:0]IN_CLK+, IN_CLK-
Differential
90
100
HDMI IO -- FROM HDMI v1.4b SECTION 4.2.7 to 4.2.9
VRX_5V
4.8
5-V Power Signal
I5V_Sink
5-V Input Current
VOH,HPD
High Level Output
Voltage, HPD
IOH = –4 mA
VOL,HPD
Low Level Output
Voltage, HPD
IOL = 4 mA
IIZ,HPD
Power-Down Input
Current, HPD
PDB = L
VIL,DDC
Low Level Input
Voltage, DDC
VIH,DDC
High Level Input
Voltage, DDC
IIZ,DDC
Power-Down Input
Current, DDC
VIH,CEC
High Level Input
Voltage, CEC
VIL,CEC
Low Level Input
Voltage, CEC
VHY,CEC
Input Hysteresis,
CEC
VOL,CEC
Low Level Output
Voltage, CEC
VOH,CEC
High Level Output
Voltage, CEC
IOFF_CE
Power-Down Input
Current, CEC
C
8
5.3
V
50
mA
2.4
5.3
V
GND
0.4
V
–10
10
uA
0.3 ×
VDD,DDC
V
RX_5V
HPD, RPU = 1 kΩ
DDC_SCL, DDC_SDA
PDB = L
2.7
V
–10
10
2
µA
V
0.8
0.4
V
V
CEC
PDB = L
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GND
0.6
V
2.5
3.63
V
–1.8
1.8
µA
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DC Electrical Characteristics (continued)
over recommended operating supply and temperature ranges (unless otherwise noted)
PARAMETER
TEST CONDITIONS
PIN/FREQ.
MIN
TYP
MAX
UNIT
FPD-LINK III DIFFERENTIAL DRIVER
VODp-p
Output Differential
Voltage
ΔVOD
Output Voltage
Unbalance
VOS
Output Differential
Offset Voltage
900
1
IOS
Output Short Circuit
Current
FPD-Link III Outputs = 0 V
RT
Termination
Resistance
Single-ended
IDD,VTER VTERM Current,
Normal Operation
M
Colorbar Pattern
IDDZ18
IDDZ,VTE
RM
(1)
50
mV
-50
40
mA
50
Ω
60
(1)
Colorbar Pattern
IDDZ11
mV
mV
1
Supply Current,
Normal Operation
IDD18
50
550
Offset Voltage
Unbalance
IDD11
mVp-p
DOUT+, DOUT-
ΔVOS
SUPPLY CURRENT
1200
Supply Current,
Power Down Mode
PDB = L
VTERM Current,
Power Down Mode
Colorbar Pattern
330
mA
50
mA
60
mA
15
mA
5
mA
5
mA
Specification is tested by bench characterization.
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6.6 AC Electrical Characteristics
Over recommended operating supply and temperature ranges unless otherwise specified.
PARAMETER
GPIO FREQUENCY
TEST CONDITIONS
PIN/FREQ.
MIN
TYP
MAX
UNIT
(1)
Rb,FC
Forward Channel GPIO
Frequency
IN_CLK = 25 MHz - 96 MHz
GPIO[3:0]
tGPIO,FC
GPIO Pulse Width,
Forward Channel
IN_CLK = 25 MHz - 96 MHz
GPIO[3:0]
0.25 ×
IN_CLK
>2 / IN_CLK
MHz
s
TMDS INPUT
Skew-Intra Maximum Intra-Pair
Skew
0.4 UITMDS (2)
IN_CLK±,
IN_D[2:0]±
Skew-Inter Maximum Inter-Pair
Skew
tIJIT
TMDS Clock Input Jitter
0.2 ×
Tchar (3) +
1.78
Bit Error Rate ≤1E-10
ns
0.3 UITMDS (2)
IN_CLK±
FPD-LINK III OUTPUT
tLHT
tHLT
Low Voltage Differential
Low-to-High Transition
Time
80
ps
Low Voltage Differential
High-to-Low Transition
Time
80
ps
100
ns
5
ms
(2)
s
tXZD
Output Active to OFF
Delay
tPLD
Lock Time (HDMI Rx)
tSD
Delay — Latency
tDJIT
Output Total Jitter
(Figure 5 )
λSTXBW
δSTX
(1)
(2)
(3)
(4)
10
PDB = L
IN_CLK±
Random Pattern
Low pass
filter
IN_CLK/20
145*T
0.3
UIFPD3 (4)
Jitter Transfer Function
(-3-dB Bandwidth)
960
kHz
Jitter Transfer Function
Peaking
0.1
dB
Back channel rates are available on the companion deserializer datasheet.
One bit period of the TMDS input.
Ten bit periods of the TMDS input.
One bit period of the serializer output.
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6.7 DC And AC Serial Control Bus Characteristics
over VDDI2C supply and temperature ranges unless otherwise specified. VDDI2C can be 1.8V (±5%) or 3.3V (±5%) (refer to
I2CSEL pin description for 1.8-V or 3.3-V operation).
PARAMETER
VIH,I2C
TEST CONDITIONS
MIN
MAX
UNIT
SDA and SCL, VDDI2C = 1.8 V
V
SDA and SCL, VDDI2C = 3.3 V
0.7 ×
VDDI2C
V
Input High Level, I2C
VIL,I2C
TYP
0.7 ×
VDDI2C
SDA and SCL, VDDI2C = 1.8 V
0.3 ×
VDDI2C
V
SDA and SCL, VDDI2C = 3.3 V
0.3 ×
VDDI2C
V
Input Low Level Voltage, I2C
VHY
Input Hysteresis, I2C
SDA and SCL, VDDI2C = 1.8 V or 3.3 V
VOL,I2C
Output Low Level, I2C
SDA and SCL, VDDI2C = 1.8-V, Fast-Mode, 3-mA Sink
Current
GND
0.2 ×
VDDI2C
V
SDA and SCL, VDDI2C = 3.3-V, 3-mA Sink Current
GND
0.4
V
SDA and SCL, VDDI2C = 0 V
-800
-600
µA
-10
10
µA
IIN,I2C
Input Current, I2C
SDA and SCL, VDDI2C = VDD18 or VDD33
CIN,I2C
Input Capacitance, I2C
SDA and SCL
>50
mV
5
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6.8 Recommended Timing for the Serial Control Bus
over I2C supply and temperature ranges unless otherwise specified.
PARAMETER
fSCL
tLOW
tHIGH
tHD;STA
tSU;STA
tHD;DAT
tSU;DAT
tSU;STO
tBUF
SCL Clock Frequency
SCL Low Period
SCL High Period
Hold time for a start or a
repeated start condition
Set Up time for a start or a
repeated start condition
Data Hold Time
Data Set-Up Time
Set Up Time for STOP
Condition
Bus Free Time
Between STOP and START
TEST CONDITIONS
tf
tSP
12
SCL and SDA Rise Time,
SCL and SDA Fall Time,
Input Filter
TYP
MAX
UNIT
Standard-Mode
>0
100
Fast-Mode
>0
400
kHz
Fast-Mode Plus
>0
1
MHz
Standard-Mode
4.7
µs
Fast-Mode
1.3
µs
Fast-Mode Plus
0.5
µs
Standard-Mode
4.0
µs
Fast-Mode
kHz
0.6
µs
Fast-Mode Plus
0.26
µs
Standard-Mode
4.0
µs
Fast-Mode
0.6
µs
Fast-Mode Plus
0.26
µs
Standard-Mode
4.7
µs
Fast-Mode
0.6
µs
Fast-Mode Plus
0.26
µs
Standard-Mode
0
µs
Fast-Mode
0
µs
Fast-Mode Plus
0
µs
Standard-Mode
250
ns
Fast-Mode
100
ns
Fast-Mode Plus
50
ns
Standard-Mode
4.0
µs
Fast-Mode
0.6
µs
Fast-Mode Plus
0.26
µs
Standard-Mode
4.7
µs
Fast-Mode
1.3
µs
Fast-Mode Plus
0.5
µs
Standard-Mode
tr
MIN
1000
ns
Fast-Mode
300
ns
Fast-Mode Plus
120
ns
Standard-Mode
300
ns
Fast-Mode
300
ns
Fast-Mode Plus
120
ns
Fast-Mode
50
ns
Fast-Mode Plus
50
ns
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PARALLEL-TO-SERIAL
6.9 Timing Diagrams
IN_CLK±
IN_D[2:0]±
DOUT+
100 nF
100 :
D
DOUT-
Differential probe
Input Impedance • 100 k:
CL ” 0.5 pf
BW • 3.5 GHz
SCOPE
BW • 4 GHz
100 nF
DOUT-
VOD/2
Single Ended
VOD/2
DOUT+
|
VOS
0V
VOD
(DOUT+) - (DOUT-)
Differential
0V
Figure 1. Serializer VOD Output
80%
(DOUT+) - (DOUT-)
VOD
tLHT
0V
20%
tHLT
Figure 2. Output Transition Times
VDD
VDDIO
PDB
RX_5V
IN_CLK
(Diff.)
tPLD
DOUT
(Diff.)
Driver OFF, VOD = 0V
Driver On
Figure 3. Serializer Lock Time
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|
Timing Diagrams (continued)
N-1
N
N+1
N+2
|
IN_D[2:0]
|
tSD
IN_CLK
1
0
1
2
0
1
|
|
|
2
2
0
1
2
|
0
|
2
|
1
|
0
|
DOUT
|
STOP START
STOP START
STOP START
STOP
STOP START
BIT BIT SYMBOL N-2
BIT BIT SYMBOL N-1
BIT BIT
BIT BIT SYMBOL N-3
SYMBOL N BIT
|
SYMBOL N-4
Figure 4. Latency Delay
tDJIT
tDJIT
DOUT
(Diff.)
EYE OPENING
0V
tBIT (1 UI)
Figure 5. Serializer Output Jitter
SDA
tf
tHD;STA
tLOW
tr
tf
tr
tBUF
tSP
SCL
tSU;STA
tHD;STA
tHIGH
tSU;STO
tSU;DAT
tHD;DAT
START
STOP
REPEATED
START
START
Figure 6. Serial Control Bus Timing Diagram
T
tLC
tHC
VIH
I2S_CLK
VIL
tsr
thr
I2S_WC
I2S_D[A,B,C,D]
Figure 7. I2S Timing Diagram
14
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6.10 Typical Characteristics
Figure 8. Serializer Output at 2.975 Gbps (85-MHz TMDS
Clock)
Figure 9. Serializer Output at 3.36 Gbps (96-MHz TMDS
Clock)
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7 Detailed Description
7.1 Overview
The DS90UB929-Q1 converts an HDMI interface (3 TMDS data channels + 1 TMDS Clock) to an FPD-Link III
interface. This device transmits a 35-bit symbol over a single serial pair operating up to 3.36-Gbps line rate. The
serial stream contains an embedded clock, video control signals, RGB video data, and audio data. The payload
is DC-balanced to enhance signal quality and support AC coupling.
The DS90UB929-Q1 serializer is intended for use with a DS90UB926Q-Q1, DS90UB928Q-Q1, DS90UB940-Q1,
DS90UB948-Q1 deserializer.
The DS90UB929-Q1 serializer and companion deserializer incorporate an I2C-compatible interface. The I2Ccompatible interface allows programming of serializer or deserializer devices from a local host controller. In
addition, the device incorporates a bidirectional control channel (BCC) that allows communication between
serializer and deserializer, as well as remote I2C slave devices.
The bidirectional control channel (BCC) is implemented through embedded signaling in the high-speed forward
channel (serializer to deserializer) combined with lower speed signaling in the reverse channel (deserializer to
serializer). Through this interface, the BCC provides a mechanism to bridge I2C transactions across the serial
link from one I2C bus to another. The implementation allows for arbitration with other I2C-compatible masters at
either side of the serial link.
7.2 Functional Block Diagram
Packet
FIFO
Audio
PLL
TMDS
HDMI RX
PHY
Digital
TMDS
Interface
Audio
FIFO
Video
HDMI Controller
Digital
I2S Audio
PAT
GEN
H
D
C
P
FPD-Link III Digital
H
D
C
P
HPA
RX_5V
FPD-Link
III TX
Digital
FPD3 TX
Analog
FPD-Link III
FPD-Link
III TX
Digital
DDC
EDID/
Config
NVM
EDID Bridge Control
Digital
I/F
I2C
16
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Optional
Secondary
I2S
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7.3 Feature Description
7.3.1 High-Definition Multimedia Interface (HDMI)
HDMI is a leading interface standard used to transmit digital video and audio from sources (such as a DVD
player) to sinks (such as an LCD display). The interface is capable of transmitting high-definition video and audio.
Other HDMI signals consist of various control and status data that travel bidirectionally.
7.3.1.1 HDMI Receive Controller
The HDMI Receiver is an HDMI version 1.4b compliant receiver. The HDMI receiver is capable of operation at
greater than 1080p resolutions. The DS90UB929-Q1 implementation is restricted to 720p operation (or 1080i or
1080p/30). The configuration used in the DS90UB929-Q1does not include version 1.4b features such as the
ethernet channel (HEC) or Audio Return Channel (ARC).
7.3.2 Transition Minimized Differential Signaling
HDMI uses Transition Minimized Differential Signaling (TMDS) over four differential pairs (3 TMDS channels and
1 TMDS clock) to transmit video and audio data. TMDS is widely used to transmit high-speed serial data. The
technology incorporates a form of 8b/10b encoding and the differential signaling allows the device to reduce
electromagnetic interference (EMI) and achieve high skew tolerance.
7.3.3 Enhanced Display Data Channel
The Display Data Channel or DDC is a collection of digital communication protocols between a computer display
and a graphics adapter that enables the display to list and send all the supported display modes to the adapter
and allow the computer host to adjust monitor parameters, such as brightness and contrast.
7.3.4 Extended Display Identification Data (EDID)
EDID is a data structure provided by a digital display to list all the capabilities of the display to a video source.
After receiving this information, the video source can send back video data with proper timing and resolution the
display can support. The DS90UB929-Q1 supports several options for delivering display identification (EDID)
information to the HDMI graphics source. The EDID information is accessible through the DDC interface and
comply with the DDC and EDID requirements given in the HDMI v1.4b specification.
The EDID configurations supported are as follows:
• External local EDID (EEPROM)
• Internal EDID loaded into device memory
• Remote EDID connected to I2C bus at deserializer side
• Internal pre-programmed EDID
The selected EDID mode should be configurable from either the MODE_SEL pins or from internal control
registers. For all modes, the EDID information should be accessible at the default address of 0xA0.
7.3.4.1 External Local EDID (EEPROM)
The DS90UB929-Q1 can be configured to allow a local EEPROM EDID device. The local EDID device may
implement any EDID configuration allowable by the HDMI v1.4b and DVI 1.0 standards, including multiple
extension blocks up to 32KB.
7.3.4.2 Internal EDID (SRAM)
The DS90UB929-Q1 also allows internal loading of an EDID profile up to 256 bytes. This SRAM storage is
volatile and requires loading from an external I2C master (local or remote). The internal EDID is reloadable and
readable (local/remote) from control registers during normal operation.
7.3.4.3 External Remote EDID
The serializer copies the remote EDID connected to the I2C bus of the remote deserializer into its internal
SRAM. The remote EDID device can be a standalone I2C EEPROM, or integrated into the digital display panel.
In this mode, the serializer automatically accesses the Bidirectional Control Channel to search for the EDID
information at the default address 0xA0. Once found, the serializer copies the remote EDID into local SRAM.
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Feature Description (continued)
7.3.4.4 Internal Pre-Programmed EDID
The serializer also has an internal eFuse that is loaded into the internal SRAM with pre-programmed 256-byte
EDID data at start-up. This EDID profile supports several generic video (480p, 720p) and audio (2-channel audio)
timing profiles within the single-link operating range of the device (25-MHz to 96-MHz pixel clock). In this mode,
the internal EDID SRAM data is readable from the DDC interface. The EDID contents are below:
0x00 0xFF 0xFF 0xFF
0x1C 0x18 0x01 0x03
0x0F 0x48 0x4C 0x00
0x01 0x01 0x01 0x01
0x55 0x00 0x00 0x20
0x64 0x08 0x00 0x0A
0x49 0x2D 0x44 0x53
0x00 0x00 0x00 0x00
0x02 0x03 0x15 0x40
0x0C 0x00 0x10 0x00
0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00
0xFF 0xFF 0xFF
0x80 0x34 0x20
0x00 0x00 0x01
0x01 0x01 0x01
0x21 0x00 0x00
0x20 0x20 0x20
0x39 0x30 0x55
0x00 0x00 0x00
0x41 0x84 0x23
0x00 0x00 0x00
0x00 0x00 0x00
0x00 0x00 0x00
0x00 0x00 0x00
0x00 0x00 0x00
0x00 0x00 0x00
0x00 0x00 0x00 0x00
0x00 0x53 0x0E 0x49 0x09 0x01
0x78 0x0A 0xEC 0x18 0xA3 0x54
0x01 0x01 0x01 0x01 0x01 0x01
0x1D 0x00 0x72 0x51 0xD0 0x1E
0x18 0x00 0x00 0x00 0xFD 0x00
0x20 0x20 0x20 0x00 0x00 0x00
0x78 0x39 0x34 0x39 0x0A 0x00
0x00 0x00 0x00 0x00 0x00 0x00
0x09 0x7F 0x05 0x83 0x01 0x00
0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x28
0x00
0x46
0x01
0x20
0x3B
0xFC
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x98
0x01
0x6E
0x3D
0x00
0x00
0x01
0x66
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x25
0x01
0x50
0x62
0x54
0x10
0x57
0x03
0x00
0x00
0x00
0x00
0x00
0x00
7.3.5 Consumer Electronics Control (CEC)
Consumer Electronics Control (CEC) is designed to allow the system user to command and control up-to ten
CEC-enabled devices connected through HDMI, using only one of their remote controls (for example by
controlling a television set, set-top box, and DVD player using only the remote control of the TV). CEC also
allows for individual CEC-enabled devices to command and control each other without user intervention. CEC is
a one-wire open drain bus with an external 27-kΩ (±10%) resistor pullup to 3.3 V.
CEC protocol can be implemented using an external clock reference or the 25-MHz internal oscillator inside the
DS90UB929-Q1.
7.3.6 +5-V Power Signal
5 V is asserted by the HDMI source through the HDMI interface. The 5-V signal propagates through the
connector and cable until it reaches the sink. The 5-V supply is used for various HDMI functions, such as HPD
and DDC signals.
7.3.7 Hot Plug Detect (HPD)
The HPD pin is asserted by the sink to let the source know that it is ready to receive the HDMI signal. The
source initiates the connection by first providing the 5-V power signal through the HDMI interface. The sink holds
HPD low until it is ready to receive signals from the source, at which point it will release HPD to be pulled up to 5
V.
7.3.8 High-Speed Forward Channel Data Transfer
The High-Speed Forward Channel is composed of 35 bits of data containing RGB data, sync signals, I2C,
GPIOs, and I2S audio transmitted from serializer to deserializer. Figure 10 shows the serial stream per clock
cycle. This data payload is optimized for signal transmission over an AC-coupled link. Data is randomized,
balanced, and scrambled.
C0
C1
Figure 10. FPD-Link III Serial Stream
18
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Feature Description (continued)
The device supports TMDS clocks in the range of 25 MHz to 96 MHz over one lane. The FPD-Link III serial
stream rate is 3.36 Gbps maximum (875 Mbps minimum).
7.3.9 Back Channel Data Transfer
The Back Channel provides bidirectional communication between the display and host processor. The
information is carried from the deserializer to the serializer as serial frames. The back channel control data is
transferred over both serial links along with the high-speed forward data, DC balance coding and embedded
clock information. This architecture provides a backward path across the serial link together with a high-speed
forward channel. The back channel contains the I2C, CRC and 4 bits of standard GPIO information with 5-Mbps,
10-Mbps, or 20-Mbps line rate (configured by the compatible deserializer).
7.3.10 Power Down (PDB)
The Serializer has a PDB input pin to ENABLE or POWER DOWN the device. This pin may be controlled by an
external device, or through VDDIO, where VDDIO = 1.71 V to 1.89 V. To save power, disable the link when the
display is not necessary (PDB = LOW). Ensure that this pin is not driven HIGH before all power supplies have
reached final levels. When PDB is driven low, ensure that the pin is driven to 0 V for at least 3 ms before
releasing or driving high. In the case where PDB is pulled up to VDDIO directly, a 10-kΩ pullup resistor and a >10µF capacitor to ground are required (See Power-Up Requirements and PDB Pin).
Toggling PDB low will POWER DOWN the device and RESET all control registers to default. During this time,
PDB must be held low for a minimum of 3 ms before going high again.
7.3.11 Serial Link Fault Detect
The DS90UB929-Q1 can detect fault conditions in the FPD-Link III interconnect. If a fault condition occurs, the
Link Detect Status is 0 (cable is not detected) on bit 0 of address 0x0C (Table 8). The DS90UB929-Q1 will detect
any of the following conditions:
1. Cable open
2. “+” to “-” short
3. ”+” to GND short
4. ”-” to GND short
5. ”+” to battery short
6. ”-” to battery short
7. Cable is linked incorrectly (DOUT+/DOUT- connections reversed)
The device will detect any of the above conditions, but does not report specifically which one has occurred.
7.3.12 Interrupt Pin (INTB)
The INTB pin is an active low interrupt output pin that acts as an interrupt for various local and remote interrupt
conditions (see registers 0xC6 and 0xC7 of Register Maps). For the remote interrupt condition, the INTB pin
works in conjunction with the INTB_IN pin on the deserializer. This interrupt signal, when configured, will
propagate from the deserializer to the serializer.
1. On the Serializer, set register 0xC6[5] = 1 and 0xC6[0] = 1
2. Deserializer INTB_IN pin is set LOW by some downstream device.
3. Serializer pulls INTB pin LOW. The signal is active LOW, so a LOW indicates an interrupt condition.
4. External controller detects INTB = LOW; to determine interrupt source, read ISR register.
5. A read to ISR will clear the interrupt at the Serializer, releasing INTB.
6. The external controller typically must then access the remote device to determine downstream interrupt
source and clear the interrupt driving the Deserializer INTB_IN. This would be when the downstream device
releases the INTB_IN pin on the Deserializer. The system is now ready to return to step (2) at next falling
edge of INTB_IN.
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Feature Description (continued)
7.3.13 Remote Interrupt Pin (REM_INTB)
REM_INTB will mirror the status of INTB_IN pin on the deserializer and does not need to be cleared. If the
serializer is not linked to the deserializer, REM_INTB will be high.
7.3.14 General-Purpose I/O
7.3.14.1 GPIO[3:0] Configuration
In normal operation, GPIO[3:0] may be used as general-purpose IOs in either forward channel (outputs) or back
channel (inputs) mode. GPIO modes may be configured from the registers. See Table 1 for GPIO enable and
configuration.
Table 1. GPIO Enable and Configuration
DESCRIPTION
DEVICE
FORWARD CHANNEL
BACK CHANNEL
GPIO3
Serializer
0x0F[3:0] = 0x3
0x0F[3:0] = 0x5
Deserializer
0x1F[3:0] = 0x5
0x1F[3:0] = 0x3
GPIO2
GPIO1
GPIO0
Serializer
0x0E[7:4] = 0x3
0x0E[7:4] = 0x5
Deserializer
0x1E[7:4] = 0x5
0x1E[7:4] = 0x3
Serializer
0x0E[3:0] = 0x3
0x0E[3:0] = 0x5
Deserializer
0x1E[3:0] = 0x5
0x1E[3:0] = 0x3
Serializer
0x0D[3:0] = 0x3
0x0D[3:0] = 0x5
Deserializer
0x1D[3:0] = 0x5
0x1D[3:0] = 0x3
7.3.14.2 GPIO_REG[8:5] Configuration
GPIO_REG[8:5] are register-only GPIOs and may be programmed as outputs or read as inputs through local
register bits only. Where applicable, these bits are shared with I2S pins and will override I2S input if enabled into
GPIO_REG mode. See Table 2 for GPIO enable and configuration.
A local GPIO value may be configured and read either through local register access, or remote register access
through the Bidirectional Control Channel. Configuration and state of these pins are not transported from
serializer to deserializer as is the case for GPIO[3:0].
Table 2. GPIO_REG and GPIO Local Enable and Configuration
DESCRIPTION
REGISTER CONFIGURATION
GPIO_REG8
0x11[7:4] = 0x01
Output, L
0x11[7:4] = 0x09
Output, H
0x11[7:4] = 0x03
Input, Read: 0x1D[0]
GPIO_REG7
GPIO_REG6
GPIO_REG5
GPIO3
20
FUNCTION
0x11[3:0] = 0x1
Output, L
0x11[3:0] = 0x9
Output, H
0x11[3:0] = 0x3
Input, Read: 0x1C[7]
0x10[7:4] = 0x1
Output, L
0x10[7:4] = 0x9
Output, H
0x10[7:4] = 0x3
Input, Read: 0x1C[6]
0x10[3:0] = 0x1
Output, L
0x10[3:0] = 0x9
Output, H
0x10[3:0] = 0x3
Input, Read: 0x1C[5]
0x0F[3:0] = 0x1
Output, L
0x0F[3:0] = 0x9
Output, H
0x0F[3:0] = 0x3
Input, Read: 0x1C[3]
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Table 2. GPIO_REG and GPIO Local Enable and Configuration (continued)
DESCRIPTION
REGISTER CONFIGURATION
FUNCTION
GPIO2
0x0E[7:4] = 0x1
Output, L
GPIO1
GPIO0
0x0E[7:4] = 0x9
Output, H
0x0E[7:4] = 0x3
Input, Read: 0x1C[2]
0x0E[3:0] = 0x1
Output, L
0x0E[3:0] = 0x9
Output, H
0x0E[3:0] = 0x3
Input, Read: 0x1C[1]
0x0D[3:0] = 0x1
Output, L
0x0D[3:0] = 0x9
Output, H
0x0D[3:0] = 0x3
Input, Read: 0x1C[0]
7.3.15 Backward Compatibility
This FPD-Link III serializer is backward-compatible to the DS90UB926Q-Q1 and DS90UB928Q-Q1 for TMDS
clock frequencies ranging from 25 MHz to 85 MHz. Backward compatibility does not need to be enabled.
7.3.16 Audio Modes
The DS90UB929-Q1 supports several audio modes and functions:
• HDMI Mode
• DVI Mode
• AUX Audio Channel
When using with the DS90UH926-Q1 because the default audio mode is I2S Surround Sound and DS90UH926Q1 can not receive more than 2 channels of audio while in 24-bit mode, the DS90UB929-Q1 will automatically
transmit 18-bit video to a DS90UH926-Q1. To transmit 24-bit video to a DS90UH926-Q1, I2S Surround must be
disabled by writing to register 0x1A[0]=0.
7.3.16.1 HDMI Audio
The DS90UB929-Q1 allows embedded audio in the HDMI interface to be transported over the FPD-Link III serial
link and output on the compatible deserializer. Depending on the number of channels, HDMI audio can be output
on several I2S pins on the deserializer, or it can be converted to TDM to output on one audio output pin on the
deserializer.
7.3.16.2 DVI I2S Audio Interface
The DS90UB929-Q1 serializer features six I2S input pins that, when paired with a compatible deserializer,
supports 7.1 High-Definition (HD) Surround Sound audio applications. The bit clock (I2S_CLK) supports
frequencies between 1 MHz and the lesser of IN_CLK/2 or 13 MHz. Four I2S data inputs transport two channels
of I2S-formatted digital audio each, with each channel delineated by the word select (I2S_WC) input. Refer to
Figure 11 and Figure 12 for I2S connection diagram and timing information.
Serializer
I2S
Transmitter
Bit Clock
Word Select
4
Data
I2S_CLK
I2S_WC
I2S_Dx
Figure 11. I2S Connection Diagram
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I2S_WC
I2S_CLK
MSB
I2S_Dx
LSB MSB
LSB
Figure 12. I2S Frame Timing Diagram
Table 3 covers several common I2S sample rates:
Table 3. Audio Interface Frequencies
SAMPLE RATE (kHz)
I2S DATA WORD SIZE (BITS)
I2S CLK (MHz)
32
16
1.024
44.1
16
1.411
48
16
1.536
96
16
3.072
192
16
6.144
32
24
1.536
44.1
24
2.117
48
24
2.304
96
24
4.608
192
24
9.216
32
32
2.048
44.1
32
2.822
48
32
3.072
96
32
6.144
192
32
12.288
7.3.16.2.1 I2S Transport Modes
By default, audio is packetized and transmitted during video blanking periods in dedicated Data Island Transport
frames. Data Island frames may be disabled from control registers if Forward Channel Frame Transport of I2S
data is desired. In this mode, only I2S_DA is transmitted to a DS90UB928Q-Q1, DS90UB940-Q1, or a
DS90UB948-Q1 deserializer. If connected to a DS90UB926Q-Q1 deserializer, I2S_DA and I2S_DB are
transmitted. Surround Sound Mode, which transmits all four I2S data inputs (I2S_D[A..D]), may only be operated
in Data Island Transport mode. This mode is only available when connected to a DS90UB928Q-Q1,
DS90UB940-Q1, or a DS90UB948-Q1 deserializer.
7.3.16.2.2 I2S Repeater
I2S audio may be fanned-out and propagated in the repeater application. By default, data is propagated through
Data Island Transport during the video blanking periods. If frame transport is desired, then the I2S pins should be
connected from the deserializer to all serializers. Activating surround sound at the top-level deserializer
automatically configures downstream serializers and deserializers for surround sound transport using Data Island
Transport. If 4-channel operation using I2S_DA and I2S_DB only is desired, this mode must be explicitly set in
each serializer and deserializer control register throughout the repeater tree (Table 8).
7.3.16.3 AUX Audio Channel
The AUX Audio Channel is a single separate I2S audio data channel that may be transported independently of
the main audio stream received in either HDMI Mode or DVI Mode. This channel is shared with the GPIO[1:0]
interface and is supported by DS90UB940-Q1 and DS90UB948-Q1 deserializers.
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7.3.16.4 TDM Audio Interface
In addition to the I2S audio interface, the DS90UB929-Q1 serializer also supports TDM format. Since a number of
specifications for TDM format are in common use, the DS90UB929-Q1 offers flexible support for word length, bit
clock, number of channels to be multiplexed, and so forth. For example, assume that the word clock signal
(I2S_WC) period = 256 × bit clock (I2S_CLK) time period. In this case, the DS90UB929-Q1 can multiplex 4
channels with maximum word length of 64 bits each, or 8 channels with maximum word length of 32 bits each.
Figure 13 shows the multiplexing of 8 channels with 24-bit word length, in a format similar to I2S.
t1/fS (256 BCKs at Single Rate, 128 BCKs at Dual Rate)t
I2S_WC
I2S_CLK
Ch 1
t32 BCKst
Ch 2
t32 BCKst
Ch 3
t32 BCKst
Ch 4
t32 BCKst
Ch 5
t32 BCKst
Ch 6
t32 BCKst
Ch 7
t32 BCKst
Ch 8
t32 BCKst
23 22
23 22
23 22
23 22
23 22
23 22
23 22
23 22
2
I S Mode
DIN1
(Single)
0
0
0
0
0
0
0
0
23 22
Figure 13. TDM Format
7.3.17 Built-In Self Test (BIST)
An optional At-Speed Built-In Self Test (BIST) feature supports testing of the high-speed serial link and back
channel without external data connections. This is useful in the prototype stage, equipment production, in-system
test, and system diagnostics.
7.3.17.1 BIST Configuration And Status
The BIST mode is enabled at the deserializer by pin (BISTEN) or BIST configuration register. The test may
select either an external TMDS clock or the internal Oscillator clock (OSC) frequency. In the absence of the
TMDS clock, the user can select the internal OSC frequency at the deserializer through the BISTC pin or BIST
configuration register.
When BIST is activated at the deserializer, a BIST enable signal is sent to the serializer through the Back
Channel. The serializer outputs a test pattern and drives the link at speed. The deserializer detects the test
pattern and monitors it for errors. The deserializer PASS output pin toggles to flag each frame received
containing one or more errors. The serializer also tracks errors indicated by the CRC fields in each back channel
frame.
The BIST status can be monitored in real time on the deserializer PASS pin with each detected error resulting in
a half-pixel clock period toggled LOW. After BIST is deactivated, the result of the last test is held on the PASS
output until reset (new BIST test or Power Down). A High on PASS indicates no errors were detected. A Low on
PASS indicates one or more errors were detected. The duration of the test is controlled by the pulse width
applied to the deserializer BISTEN pin. LOCK is valid throughout the entire duration of BIST.
See Figure 14 for the BIST mode flow diagram.
Step 1: The Serializer is paired with another FPD-Link III Deserializer, then BIST Mode is enabled through the
BISTEN pin or through register on the Deserializer. Right after BIST is enabled, part of the BIST sequence
requires bit 0x04[5] be toggled locally on the Serializer (set 0x04[5]=1, then set 0x04[5]=0). The desired clock
source is selected through the deserializer BISTC pin or through register on the Deserializer.
Step 2: An all-zeros pattern is balanced, scrambled, randomized, and sent through the FPD-Link III interface to
the deserializer. When the serializer and the deserializer are in BIST mode and the deserializer acquires Lock,
the PASS pin of the deserializer goes high and BIST starts checking the data stream. If an error in the payload (1
to 35) is detected, the PASS pin will switch low for one-half of the clock period. During the BIST test, the PASS
output can be monitored and counted to determine the payload error rate.
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Step 3: To stop the BIST mode, the deserializer BISTEN pin is set low. The deserializer stops checking the data.
The final test result is held on the PASS pin. If the test ran error-free, the PASS output will remain HIGH. If there
one or more errors were detected, the PASS output will output constant LOW. The PASS output state is held
until a new BIST is run, the device is reset, or the device is powered down. The BIST duration is user-controlled
by the duration of the BISTEN signal.
Step 4: The link returns to normal operation after the deserializer BISTEN pin is low. Figure 15 shows the
waveform diagram of a typical BIST test for two cases. Case 1 is error-free, and Case 2 shows one with multiple
errors. In most cases, it is difficult to generate errors due to the robustness of the link (differential data
transmission and so forth), thus they may be introduced by greatly extending the cable length, faulting the
interconnect medium, or reducing signal condition enhancements (Rx Equalization).
For more information on using BIST, refer to the white paper: Using BIST on 94x.
Normal
Step 1: DES in BIST
BIST
Wait
Step 2: Wait, SER in BIST
BIST
start
Step 3: DES in Normal
Mode - check PASS
BIST
stop
Step 4: DES/SER in Normal
Figure 14. BIST Mode Flow Diagram
7.3.17.2 Forward Channel and Back Channel Error Checking
While in BIST mode, the serializer stops sampling the FPD-Link input pins and switches over to an internal allzeroes pattern. The internal all-zeroes pattern goes through the scrambler, DC-balancing, and so forth and is
transmitted over the serial link to the deserializer. The deserializer, on locking to the serial stream, compares the
recovered serial stream with all-zeroes and records any errors in status registers. Errors are also dynamically
reported on the PASS pin of the deserializer.
The back-channel data is checked for CRC errors once the serializer locks onto the back-channel serial stream,
as indicated by link detect status (register bit 0x0C[0] - Table 8). CRC errors are recorded in an 8-bit register in
the deserializer. The register is cleared when the serializer enters BIST mode. As soon as the serializer enters
BIST mode, the functional mode CRC register starts recording any back channel CRC errors. The BIST mode
CRC error register is active in BIST mode only, and the register keeps a record of the last BIST run until the
register is cleared or the serializer enters BIST mode again.
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DES Outputs
BISTEN
(DES)
TxCLKOUT±
TxOUT[3:0]±
Case 1 - Pass
DATA
(internal)
PASS
Prior Result
PASS
DATA
(internal)
PASS
X
X
X
FAIL
Prior Result
Normal
PRBS
Case 2 - Fail
X = bit error(s)
BIST Test
BIST Duration
BIST
Result
Held
Normal
Figure 15. BIST Waveforms, in Conjunction With Deserializer Signals
7.3.18 Internal Pattern Generation
The DS90UB929-Q1 serializer provides an internal pattern generation feature that allows for basic testing and
debugging of an integrated panel. The test patterns are simple and repetitive and provide quick visual verification
of panel operation. As long as the device is not in power down mode, the test pattern will be displayed even if no
input is applied. If no clock is received, the test pattern can be configured to use a programmed oscillator
frequency. For more information, refer to Exploring the Internal Test Pattern Generation Feature of 720p FPDLink III Devices (SNLA132).
7.3.18.1 Pattern Options
The DS90UB929-Q1 serializer pattern generator is capable of generating 17 default patterns designers can use
for basic testing and debugging of panels. Each can be inverted using register bits (Table 8), shown below:
1. White/Black (default/inverted)
2. Black/White
3. Red/Cyan
4. Green/Magenta
5. Blue/Yellow
6. Horizontally Scaled Black to White/White to Black
7. Horizontally Scaled Black to Red/Cyan to White
8. Horizontally Scaled Black to Green/Magenta to White
9. Horizontally Scaled Black to Blue/Yellow to White
10. Vertically Scaled Black to White/White to Black
11. Vertically Scaled Black to Red/Cyan to White
12. Vertically Scaled Black to Green/Magenta to White
13. Vertically Scaled Black to Blue/Yellow to White
14. Custom Color (or its inversion) configured in PGRS
15. Black-White/White-Black Checkerboard (or custom checkerboard color, configured in PGCTL)
16. YCBR/RBCY VCOM pattern, orientation is configurable from PGCTL
17. Color Bars (White, Yellow, Cyan, Green, Magenta, Red, Blue, Black) – Note: not included in the autoscrolling feature
Additionally, the Pattern Generator incorporates one configurable full-screen, 24-bit color pattern, which is
controlled by the PGRS, PGGS, and PGBS registers. This is pattern #14. One of the pattern options is statically
selected in the PGCTL register when Auto-Scrolling is disabled. The PGTSC and PGTSO1-8 registers control
the pattern selection and order when Auto-Scrolling is enabled.
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7.3.18.2 Color Modes
By default, the Pattern Generator operates in 24-bit color mode, where all bits of the Red, Green, and Blue
outputs are enabled. 18-bit color mode can be activated from the configuration registers (Table 8). In 18-bit
mode, the 6 most significant bits (bits 7-2) of the Red, Green, and Blue outputs are enabled; the 2 least
significant bits will be 0.
7.3.18.3 Video Timing Modes
The Pattern Generator has two video timing modes—external and internal. In external timing mode, the Pattern
Generator detects the video frame timing present on the DE and VS inputs. If Vertical Sync signaling is not
present on VS, the Pattern Generator determines Vertical Blank by detecting when the number of inactive pixel
clocks (DE = 0) exceeds twice the detected active line length. In internal timing mode, the Pattern Generator
uses custom video timing as configured in the control registers. The internal timing generation may also be
driven by an external clock. By default, external timing mode is enabled. Internal timing or internal timing with
external clock are enabled by the control registers (Table 8).
7.3.18.4 External Timing
In external timing mode, the Pattern Generator passes the incoming DE, HS, and VS signals unmodified to the
video control outputs after a two-pixel clock delay. It extracts the active frame dimensions from the incoming
signals to properly scale the brightness patterns. If the incoming video stream does not use the VS signal, the
Pattern Generator determines the Vertical Blank time by detecting a long period of pixel clocks without DE
asserted.
7.3.18.5 Pattern Inversion
The Pattern Generator also incorporates a global inversion control, located in the PGCFG register, which causes
the output pattern to be bitwise-inverted. For example, the full screen Red pattern becomes full-screen Cyan, and
the Vertically Scaled Black to Green pattern becomes Vertically Scaled White to Magenta.
7.3.18.6 Auto Scrolling
The Pattern Generator supports an Auto-Scrolling mode, in which the output pattern cycles through a list of
enabled pattern types. A sequence of up to 16 patterns may be defined in the registers. The patterns may
appear in any order in the sequence and may also appear more than once.
7.3.18.7 Additional Features
Additional pattern generator features can be accessed through the Pattern Generator Indirect Register Map. It
consists of the Pattern Generator Indirect Address (PGIA reg_0x66 — Table 8) and the Pattern Generator
Indirect Data (PGID reg_0x67 — Table 8). See Exploring the Internal Test Pattern Generation Feature of 720p
FPD-Link III Devices (SNLA132).
7.3.19 Spread Spectrum Clock Tolerance
The DS90UB929-Q1 (for DVI mode) tolerates a spread spectrum input clock to help reduce EMI. The following
triangular SSC profile is supported:
• Frequency deviation ≤ 2.5%
• Modulation rate ≤ 100 kHz
Maximum frequency deviation and maximum modulation rate are not supported simultaneously. Some typical
examples:
• Frequency deviation: 2.5%, modulation rate: 50 kHz
• Frequency deviation: 1.25%, modulation rate: 100 kHz
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7.4 Device Functional Modes
7.4.1 Mode Select Configuration Settings (MODE_SEL[1:0])
Configuration of the device may be done through the MODE_SEL[1:0] input pins, or through the configuration
register bits. A pullup resistor and a pulldown resistor of suggested values may be used to set the voltage ratio of
the MODE_SEL[1:0] inputs. See Table 5 and Table 6. These values will be latched into the register location
during power-up:
Table 4. MODE_SEL[1:0] Settings
MODE
SETTING
FUNCTION
0
Look for remote EDID. If none found, use internal SRAM EDID. Can be overridden
from register. Remote EDID address may be overridden from default 0xA0.
1
Use external local EDID.
0
HDMI audio.
1
HDMI + AUX audio channel.
0
Internal HDMI control.
1
External HDMI control from I2C interface pins.
0
Enable FPD-Link III for twisted-pair cabling.
1
Enable FPD-Link III for coaxial cabling.
0
Use internal SRAM EDID.
1
If available, remote EDID is copied into internal SRAM EDID.
EDID_SEL: Display ID Select
AUX_I2S: AUX Audio Channel
EXT_CTL: External Controller
Override
COAX: Cable Type
REM_EDID_LOAD: Remote
EDID Load
1.8V
R3
VR4
MODE_SEL0
MODE_SEL1
1.8V
R4
Serializer
R5
VR6
R6
Figure 16. MODE_SEL[1:0] Connection Diagram
Table 5. Configuration Select (MODE_SEL0)
#
RATIO
VR4/VDD18
TARGET VR4
(V)
1
0
0
2
0.208
3
0.553
4
0.668
(1)
SUGGESTED
RESISTOR PULLUP
R3 kΩ (1% tol)
SUGGESTED
RESISTOR
PULLDOWN R4 kΩ
(1% tol)
EDID_SEL
AUX_I2S
OPEN
Any value less than
100 (1)
0
0
0.374
118
30.9
0
1
0.995
82.5
102
1
0
1.202
68.1
137
1
1
This resistor does not need to be 1% tolerance. 5% is acceptable.
Table 6. Configuration Select (MODE_SEL1)
#
RATIO
VR6/VDD18
TARGET VR6
(V)
SUGGESTED
RESISTOR
PULLUP R5 kΩ
(1% tol)
SUGGESTED
RESISTOR
PULLDOWN R6
kΩ (1% tol)
1
0
0
OPEN
Any value less
than 100 (1)
(1)
EXT_CTL
COAX
REM_EDID_LOA
D
0
0
0
This resistor does not need to be 1% tolerance. 5% is acceptable.
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Table 6. Configuration Select (MODE_SEL1) (continued)
#
RATIO
VR6/VDD18
TARGET VR6
(V)
SUGGESTED
RESISTOR
PULLUP R5 kΩ
(1% tol)
SUGGESTED
RESISTOR
PULLDOWN R6
kΩ (1% tol)
EXT_CTL
COAX
REM_EDID_LOA
D
2
0.208
0.374
118
30.9
0
0
1
3
0.323
0.582
107
51.1
0
1
0
4
0.440
0.792
113
88.7
0
1
1
5
0.553
0.995
82.5
102
1
0
0
6
0.668
1.202
68.1
137
1
0
1
7
0.789
1.420
56.2
210
1
1
0
8
1
1.8
Any value less
than 100 (1)
OPEN
1
1
1
The strapped values can be viewed and/or modified in the following locations:
• EDID_SEL : Latched into BRIDGE_CTL[0], EDID_DISABLE (0x4F[0]).
• AUX_I2S : Latched into BRIDGE_CFG[1], AUDIO_MODE[1] (0x54[1]).
• EXT_CTL: Latched into BRIDGE_CFG[7], EXT_CONTROL (0x54[7]).
• COAX : Latched into DUAL_CTL1[7], COAX_MODE (0x5B[7]).
• REM_EDID_LOAD : Latched into BRIDGE_CFG[5] (0x54[5]).
7.4.2 FPD-Link III Single Link Operation
The single link mode of the device transmits the video over a single FPD-Link III to a single receiver. Single link
mode supports frequencies up to 96 MHz for 24-bit video when paired with the DS90UB940-Q1/DS90UB948-Q1.
This mode is compatible with the DS90UB926Q-Q1/DS90UB928Q-Q1 when operating below 85 MHz.
7.4.3 Frequency Detection Circuit May Reset the FPD-Link III PLL During a Temperature Ramp
When ambient temperature around the DS90UB929-Q1 changes by more than 40°C, the frequency detection
logic in the device can RESET the FPD-Link III PLL even though the input PCLK has not changed. This behavior
may result in a loss of lock in the Deserializer and flicker on the system display.
The following programming sequence is required for all systems. This should be written after the user register
configuration of the DS90UB929-Q1 and downstream deserializer configuration.
• Disable the “Reset FPD-Link III PLL on Frequency Change” feature after the DS90UX9X9-Q1 power-up.
– Set Reg0x5B[5]=0b (Disable PLL reset feature via RST_PLL_FREQ field in DUAL_CTL1 register)
Any device configuration including this one should be written as a part of the Init A sequence as shown in
Figure 29.
7.5 Programming
7.5.1 Serial Control Bus
This serializer may also be configured by the use of a I2C-compatible serial control bus. Multiple devices may
share the serial control bus (up to 8 device addresses supported). The device address is set through a resistor
divider (R1 and R2 — see Figure 17 below) connected to the IDx pin.
28
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Programming (continued)
VDD18
VDDI2C
R1
VR2
4.7k
4.7k
IDx
R2
HOST
SER
SCL
SCL
SDA
SDA
To other
Devices
Figure 17. Serial Control Bus Connection
The serial control bus consists of two signals, SCL and SDA. SCL is a Serial Bus Clock Input. SDA is the Serial
Bus Data Input / Output signal. Both SCL and SDA signals require an external pullup resistor to VDD18 or VDD33.
For most applications, a 4.7-kΩ pullup resistor is recommended. However, the pullup resistor value may be
adjusted for capacitive loading and data rate requirements. The signals are either pulled High, or driven Low.
The IDx pin configures the control interface to one of 8 possible device addresses. A pullup resistor and a
pulldown resistor may be used to set the appropriate voltage on the IDx input pin See Table 8. 1% or 5%
resistors can be used.
Table 7. Serial Control Bus Addresses for IDx
(1)
#
RATIO
VR2 / VDD18
IDEAL VR2
(V)
SUGGESTED
RESISTOR R1 kΩ
(1% tol)
SUGGESTED
RESISTOR R2 kΩ
(1% tol)
1
0
0
OPEN
2
0.208
0.374
3
0.323
0.582
4
0.440
5
6
7-BIT ADDRESS
8-BIT ADDRESS
Any value less than
100 (1)
0x0C
0x18
118
30.9
0x0E
0x1C
107
51.1
0x10
0x20
0.792
113
88.7
0x12
0x24
0.553
0.995
82.5
102
0x14
0x28
0.668
1.202
68.1
137
0x16
0x2C
7
0.789
1.420
56.2
210
0x18
0x30
8
1
1.8
Any value less than
100 (1)
OPEN
0x1A
0x34
This resistor does not need to be 1% tolerance. 5% is acceptable.
The Serial Bus protocol is controlled by START, START-Repeated, and STOP phases. A START occurs when
SCL transitions Low while SDA is High. A STOP occurs when SDA transitions High while SCL is also HIGH. See
Figure 18.
SDA
SCL
P
S
START condition, or
START repeat condition
STOP condition
Figure 18. Start and Stop Conditions
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To communicate with an I2C slave, the host controller (master) sends the slave address and listens for a
response from the slave. This response is referred to as an acknowledge bit (ACK). If a slave on the bus is
addressed correctly, it Acknowledges (ACKs) the master by driving the SDA bus Low. If the address does not
match a slave address of the device, it Not-acknowledges (NACKs) the master by letting SDA be pulled High.
ACKs also occur on the bus when data is being transmitted. When the master is writing data, the slave ACKs
after every data byte is successfully received. When the master is reading data, the master ACKs after every
data byte is received to let the slave know that the host is ready to receive another data byte. When the master
wants to stop reading, it NACKs after the last data byte and creates a stop condition on the bus. All
communication on the bus begins with either a Start condition or a Repeated Start condition. All communication
on the bus ends with a Stop condition. A READ is shown in Figure 19 and a WRITE is shown in Figure 20.
Register Address
Slave Address
A
2
S
A
1
A
0
0
Slave Address
a
c
k
a
c
k
A
2
Sr
A
1
Data
A
0
1
a
c
k
a
c
k
P
Figure 19. Serial Control Bus — Read
Register Address
Slave Address
S
A
2
A
1
A
0
0
Data
a
c
k
a
c
k
a
c
k
P
Figure 20. Serial Control Bus — Write
The I2C Master located at the serializer must support I2C clock stretching. For more information on I2C interface
requirements and throughput considerations, refer to the TI Application Note AN-2173 I2C Communication Over
FPD-Link III with Bidirectional Control Channel (SNLA131).
7.5.2 Multi-Master Arbitration Support
The Bidirectional Control Channel in the FPD-Link III devices implements I2C-compatible bus arbitration in the
proxy I2C master implementation. When sending a data bit, each I2C master senses the value on the SDA line.
If the master is sending a logic 1 but senses a logic 0, the master has lost arbitration. It will stop driving SDA,
retrying the transaction when the bus becomes idle. Thus, multiple I2C masters may be implemented in the
system.
Ensure that all I2C masters on the bus support multi-master arbitration.
Assign I2C addresses with more than a single bit set to 1 for all devices on the I2C bus. 0x6A, 0x7B, and 0x37
are examples of good choices for an I2C address. 0x40 and 0x20 are examples of bad choices for an I2C
address.
If the system does require master-slave operation in both directions across the BCC, some method of
communication must be used to ensure only one direction of operation occurs at any time. The communication
method could include using available read/write registers in the deserializer to allow masters to communicate
with each other to pass control between the two masters. An example would be to use register 0x18 or 0x19 in
the deserializer as a mailbox register to pass control of the channel from one master to another.
7.5.3 I2C Restrictions on Multi-Master Operation
The I2C specification does not provide for arbitration between masters under certain conditions. The system
should make sure the following conditions cannot occur to prevent undefined conditions on the I2C bus:
• One master generates a repeated Start while another master is sending a data bit.
• One master generates a Stop while another master is sending a data bit.
• One master generates a repeated Start while another master sends a Stop.
Note that these restrictions mainly apply to accessing the same register offsets within a specific I2C slave.
30
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7.5.4 Multi-Master Access to Device Registers for Newer FPD-Link III Devices
When using the latest generation of FPD-Link III devices, DS90UB929-Q1 or DS90UB940-Q1/DS90UB948-Q1
registers may be accessed simultaneously from both local and remote I2C masters. These devices have internal
logic to properly arbitrate between sources to allow proper read and write access without risk of corruption.
Access to remote I2C slaves would still be allowed in only one direction at a time.
7.5.5 Multi-Master Access to Device Registers for Older FPD-Link III Devices
When using older FPD-Link III devices, simultaneous access to serializer or deserializer registers from both local
and remote I2C masters may cause incorrect operation, thus restrictions should be imposed on accessing of
serializer and deserializer registers. The likelihood of an error occurrence is relatively small, but it is possible for
collision on reads and writes to occur, resulting in an errored read or write.
Two basic options are recommended. The first is to allow device register access only from one controller. This
would allow only the Host controller to access the serializer registers (local) and the deserializer registers
(remote). A controller at the deserializer would not be allowed to access the deserializer or serializer registers.
The second basic option is to allow local register access only with no access to remote serializer or deserializer
registers. The Host controller would be allowed to access the serializer registers while a controller at the
deserializer could access those register only. Access to remote I2C slaves would still be allowed in one direction.
In a very limited case, remote and local access could be allowed to the deserializer registers at the same time.
Register access can work as intended if both local and remote masters are accessing the same deserializer
register. This allows a simple method of passing control of the Bidirectional Control Channel from one master to
another.
7.5.6 Restrictions on Control Channel Direction for Multi-Master Operation
Only one direction should be active at any time across the Bidirectional Control Channel. If both directions are
required, some method of transferring control between I2C masters should be implemented.
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7.6 Register Maps
Table 8. Serial Control Bus Registers
ADD
(dec)
ADD
(hex)
REGISTER
NAME
0
0x00
I2C Device ID
1
32
0x01
Reset
A software I2C
reset command
issued by writing
to register 0x01
is supported only
when operating
I2C in the 3.3V
mode.
BIT(S)
REGISTER
TYPE
DEFAULT
(hex)
7:1
RW
Strap
DEVICE_ID
7-bit address of Serializer. Defaults to address configured by the IDx strap pin.
0
RW
0x00
ID Setting
I2C ID setting.
0: Device I2C address is from IDx strap pin (default).
1: Device I2C address is from 0x00[7:1].
7:5
4
FUNCTION
0x00
DESCRIPTION
Reserved.
RW
HDMI Reset
1
RW
Digital
RESET1
Reset the entire digital block including registers. This bit is self-clearing.
0: Normal operation (default).
1: Reset.
Following the setting of this bit, the software should also set bit 0x4F[1] (BRIDGE_CTL
register). This will restore register values that are initially loaded from Non-Volatile
Memory to their default state.
0
RW
Digital
RESET0
Reset the entire digital block except registers. This bit is self-clearing.
0: Normal operation (default).
1: Reset.
Registers which are loaded by pin strap will be restored to their original strap value when
this bit is set. These registers show 'Strap' as their default value in this table.
Registers 0x00, 0x13, 0x15, 0x18, 0x19, 0x1A, 0x48-0x55, 0x58, 0x5B, 0xC0, 0xC2,
0xC3, 0xC6, 0xC8, 0xCE and 0xD0 are also restored to their default value when this bit
is set.
3:2
HDMI Digital Reset.
Resets the HDMI digital block. This bit is self-clearing.
0: Normal operation.
1: Reset.
Reserved.
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
3
0x03
General
Configuration
BIT(S)
REGISTER
TYPE
DEFAULT
(hex)
7
RW
0xD2
FUNCTION
Back channel
CRC Checker
Enable
6
Reserved.
RW
I2C Remote
Write Auto
Acknowledge
Automatically acknowledge I2C remote writes. When enabled, I2C writes to the
Deserializer (or any remote I2C Slave, if I2C PASS ALL is enabled) are immediately
acknowledged without waiting for the Deserializer to acknowledge the write. This allows
higher throughput on the I2C bus. Note: this mode will prevent any NACK from a remote
device from reaching the I2C master.
0: Disable (default).
1: Enable.
4
RW
Filter Enable
HS, VS, DE two-clock filter. When enabled, pulses less than two full TMDS clock cycles
on the DE, HS, and VS inputs will be rejected.
0: Filtering disable.
1: Filtering enable (default).
3
RW
I2C Passthrough
I2C pass-through mode. Read/Write transactions matching any entry in the Slave Alias
registers will be passed through to the remote Deserializer.
0: Pass-through disabled (default).
1: Pass-through enabled.
RW
TMDS Clock
Auto
1
Reserved.
0
0x04
Mode Select
Enable/disable back channel CRC Checker.
0: Disable.
1: Enable (default).
5
2
4
DESCRIPTION
7
Switch over to internal oscillator in the absence of TMDS Clock.
0: Disable auto-switch.
1: Enable auto-switch (default).
Reserved.
RW
0x80
Failsafe State
6
Input failsafe state.
0: Failsafe to High.
1: Failsafe to Low (default).
Reserved.
5
RW
CRC Error
Reset
Clear back channel CRC Error counters. This bit is NOT self-clearing.
0: Normal operation (default).
1: Clear counters.
4
RW
Video gate
Set to 1. This prevents video from being sent during the blanking interval.
3:0
Reserved.
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
BIT(S)
5
0x05
I2C Control
7:5
6
7
0x06
0x07
DES ID
Slave ID[0]
DEFAULT
(hex)
FUNCTION
0x00
DESCRIPTION
Reserved.
4:3
RW
SDA Output
Delay
Configures output delay on the SDA output. Setting this value will increase output delay
in units of 40ns.
Nominal output delay values for SCL to SDA are:
00: 240ns (default).
01: 280ns.
10: 320ns.
11: 360ns.
2
RW
Local Write
Disable
Disable remote writes to local registers. Setting this bit to 1 will prevent remote writes to
local device registers from across the control channel. This prevents writes to the
Serializer registers from an I2C master attached to the Deserializer. Setting this bit does
not affect remote access to I2C slaves at the Serializer.
0: Enable (default).
1: Disable.
1
RW
I2C Bus Timer
Speedup
Speed up I2C bus Watchdog Timer.
0: Watchdog Timer expires after approximately 1s (default).
1: Watchdog Timer expires after approximately 50µs.
0
RW
I2C Bus Timer
Disable
Disable I2C bus Watchdog Timer. The I2C Watchdog Timer may be used to detect when
the I2C bus is free or hung up following an invalid termination of a transaction. If SDA is
high and no signaling occurs for approximately 1s, the I2C bus will be assumed to be
free. If SDA is low and no signaling occurs, the device will attempt to clear the bus by
driving 9 clocks on SCL.
0: Enable (default).
1: Disable.
7:1
RW
0
RW
7:1
RW
0
34
REGISTER
TYPE
0x00
0x00
DES Device ID 7-bit I2C address of the remote Deserializer. A value of 0 in this field disables I2C access
to the remote Deserializer. This field is automatically configured by the Bidirectional
Control Channel once RX Lock has been detected. Software may overwrite this value,
but should also assert the FREEZE DEVICE ID bit to prevent overwriting by the
Bidirectional Control Channel.
Freeze Device
ID
Freeze Deserializer Device ID.
1: Prevents auto-loading of the Deserializer Device ID by the Bidirectional Control
Channel. The ID will be frozen at the value written.
0: Allows auto-loading of the Deserializer Device ID from the Bidirectional Control
Channel.
Slave ID 0
7-bit I2C address of the remote Slave 0 attached to the remote Deserializer. If an I2C
transaction is addressed to Slave Alias ID 0, the transaction will be remapped to this
address before passing the transaction across the Bidirectional Control Channel to the
Deserializer. A value of 0 in this field disables access to the remote Slave 0.
Reserved.
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
BIT(S)
REGISTER
TYPE
DEFAULT
(hex)
8
0x08
Slave Alias[0]
7:1
RW
0x00
Slave Alias ID
0
10
0x0A
CRC Errors
7:0
R
0x00
CRC Error
LSB
Number of back channel CRC errors – 8 least significant bits. Cleared by 0x04[5].
11
0x0B
7:0
R
0x00
CRC Error
MSB
Number of back channel CRC errors – 8 most significant bits. Cleared by 0x04[5].
12
0x0C
0x00
Link Lost
Link lost flag for selected port:
This bit indicates that loss of link has been detected. This register bit will stay high until
cleared using the CRC Error Reset in register 0x04.
FUNCTION
0
General Status
DESCRIPTION
7-bit Slave Alias ID of the remote Slave 0 attached to the remote Deserializer. The
transaction will be remapped to the address specified in the Slave ID 0 register. A value
of 0 in this field disables access to the remote Slave 0.
Reserved.
7:5
Reserved.
4
3
R
BIST CRC
Error
Back channel CRC error(s) during BIST communication with Deserializer. This bit is
cleared upon loss of link, restart of BIST, or assertion of CRC Error Reset bit in 0x04[5].
0: No CRC errors detected during BIST.
1: CRC error(s) detected during BIST.
2
R
TMDS Clock
Detect
Pixel clock status:
0: Valid clock not detected at HDMI input.
1: Valid clock detected at HDMI input.
1
R
DES Error
CRC error(s) during normal communication with Deserializer. This bit is cleared upon
loss of link or assertion of 0x04[5].
0: No CRC errors detected.
1: CRC error(s) detected.
0
R
Link Detect
Link detect status:
0: Cable link not detected.
1: Cable link detected.
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
13
0x0D
GPIO0
Configuration
14
36
0x0E
GPIO1 and
GPIO2
Configuration
BIT(S)
REGISTER
TYPE
7:4
R
3
RW
2:0
RW
7
RW
6:4
DEFAULT
(hex)
FUNCTION
DESCRIPTION
Revision ID
Revision ID.
GPIO0 Output
Value
Local GPIO Output Value. This value is output on the GPIO pin when the GPIO function
is enabled, the local GPIO direction is set to output, and remote GPIO control is disabled.
0: Output LOW (default).
1: Output HIGH.
GPIO0 Mode
Determines operating mode for the GPIO pin:
x00: Functional input mode.
x10: TRI-STATE™
001: GPIO mode, output.
011: GPIO mode, input.
101: Remote-hold mode. The GPIO pin will be an output, and the value is received from
the remote Deserializer. In remote-hold mode, data is maintained on link loss.
111: Remote-default mode. The GPIO pin will be an output, and the value is received
from the remote Deserializer. In remote-default mode, GPIO's Output Value bit is output
on link loss.
GPIO2 Output
Value
Local GPIO Output Value. This value is output on the GPIO pin when the GPIO function
is enabled, the local GPIO direction is set to output, and remote GPIO control is disabled.
0: Output LOW (default).
1: Output HIGH.
RW
GPIO2 Mode
Determines operating mode for the GPIO pin:
x00: Functional input mode.
x10: TRI-STATE™.
001: GPIO mode, output.
011: GPIO mode, input.
101: Remote-hold mode. The GPIO pin will be an output, and the value is received from
the remote Deserializer. In remote-hold mode, data is maintained on link loss.
111: Remote-default mode. The GPIO pin will be an output, and the value is received
from the remote Deserializer. In remote-default mode, GPIO's Output Value bit is output
on link loss.
3
RW
GPIO1 Output
Value
Local GPIO Output Value. This value is output on the GPIO pin when the GPIO function
is enabled, the local GPIO direction is set to output, and remote GPIO control is disabled.
0: Output LOW (default).
1: Output HIGH.
2:0
RW
GPIO1 Mode
Determines operating mode for the GPIO pin:
x00: Functional input mode.
x10: TRI-STATE™.
001: GPIO mode, output.
011: GPIO mode, input.
101: Remote-hold mode. The GPIO pin will be an output, and the value is received from
the remote Deserializer. In remote-hold mode, data is maintained on link loss.
111: Remote-default mode. The GPIO pin will be an output, and the value is received
from the remote Deserializer. In remote-default mode, GPIO's Output Value bit is output
on link loss.
0x00
0x00
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
15
0x0F
GPIO3
Configuration
16
0x10
GPIO5_REG
and
GPIO6_REG
Configuration
BIT(S)
REGISTER
TYPE
7:4
DEFAULT
(hex)
FUNCTION
0x00
DESCRIPTION
Reserved.
3
RW
GPIO3 Output
Value
Local GPIO Output Value. This value is output on the GPIO pin when the GPIO function
is enabled, the local GPIO direction is set to output, and remote GPIO control is disabled.
0: Output LOW (default).
1: Output HIGH.
2:0
RW
GPIO3 Mode
Determines operating mode for the GPIO pin:
x00: Functional input mode.
x10: TRI-STATE.
001: GPIO mode, output.
011: GPIO mode, input.
101: Remote-hold mode. The GPIO pin will be an output, and the value is received from
the remote Deserializer. In remote-hold mode, data is maintained on link loss.
111: Remote-default mode. The GPIO pin will be an output, and the value is received
from the remote Deserializer. In remote-default mode, GPIO's Output Value bit is output
on link loss.
7
RW
GPIO6_REG
Output Value
Local GPIO Output Value. This value is output on the GPIO pin when the GPIO function
is enabled and the local GPIO direction is set to output.
0: Output LOW (default).
1: Output HIGH.
0x00
6
Reserved.
5:4
RW
GPIO6_REG
Mode
Determines operating mode for the GPIO pin:
00: Functional input mode.
10: TRI-STATE™.
01: GPIO mode, output.
11: GPIO mode; input.
3
RW
GPIO5_REG
Output Value
Local GPIO Output Value. This value is output on the GPIO pin when the GPIO function
is enabled and the local GPIO direction is set to output.
0: Output LOW (default).
1: Output HIGH.
2
1:0
Reserved.
RW
GPIO5_REG
Mode
Determines operating mode for the GPIO pin:
00: Functional input mode.
10: TRI-STATE™.
01: GPIO mode, output.
11: GPIO mode; input.
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
17
0x11
GPIO7_REG
and
GPIO8_REG
Configuration
BIT(S)
REGISTER
TYPE
DEFAULT
(hex)
7
RW
0x00
FUNCTION
GPIO8_REG
Output Value
6
Local GPIO Output Value. This value is output on the GPIO pin when the GPIO function
is enabled and the local GPIO direction is set to output.
0: Output LOW (default).
1: Output HIGH.
Reserved.
5:4
RW
GPIO8_REG
Mode
Determines operating mode for the GPIO pin:
00: Functional input mode.
10: TRI-STATE.
01: GPIO mode, output.
11: GPIO mode; input.
3
RW
GPIO7_REG
Output Value
Local GPIO Output Value. This value is output on the GPIO pin when the GPIO function
is enabled and the local GPIO direction is set to output.
0: Output LOW (default).
1: Output HIGH.
2
1:0
38
DESCRIPTION
Reserved.
RW
GPIO7_REG
Mode
Determines operating mode for the GPIO pin:
00: Functional input mode.
10: TRI-STATE.
01: GPIO mode, output.
11: GPIO mode; input.
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
18
0x12
Data Path
Control
19
0x13
General Purpose
Control
BIT(S)
REGISTER
TYPE
7
DEFAULT
(hex)
FUNCTION
0x00
DESCRIPTION
Reserved.
6
RW
Pass RGB
Setting this bit causes RGB data to be sent independent of DE. However, setting this bit
blocks packetized audio. This bit does not need to be set in UB serializers.
0: Normal operation.
1: Pass RGB independent of DE.
5
RW
DE Polarity
This bit indicates the polarity of the DE (Data Enable) signal.
0: DE is positive (active high, idle low).
1: DE is inverted (active low, idle high).
4
RW
I2S Repeater
Regen
Regenerate I2S data from Repeater I2S pins.
0: Repeater pass through I2S from video pins (default).
1: Repeater regenerate I2S from I2S pins.
3
RW
I2S Channel B
Enable
Override
I2S Channel B Enable Override.
0: Disable I2S Channel B override.
1: Set I2S Channel B Enable from 0x12[0].
2
RW
18-Bit Video
Select
0: Select 24-bit video mode.
1: Select 18-bit video mode.
1
RW
I2S Transport
Select
Select I2S transport mode:
0: Enable I2S Data Island transport (default).
1: Enable I2S Data Forward Channel Frame transport.
0
RW
I2S Channel B
Enable
I2S Channel B Enable.
0: I2S Channel B disabled.
1: Enable I2S Channel B on B1 input.
Note that in a repeater, this bit may be overridden by the in-band I2S mode detection.
7
R
MODE_SEL1
Done
Indicates MODE_SEL1 value has stabilized and has been latched.
6:4
R
MODE_SEL1
Decode
Returns the 3-bit decode of the MODE_SEL1 pin.
3
R
MODE_SEL0
Done
Indicates MODE_SEL0 value has stabilized and has been latched.
2:0
R
MODE_SEL0
Decode
Returns the 3-bit decode of the MODE_SEL0 pin.
0x88
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
20
0x14
BIST Control
REGISTER
TYPE
7:3
DEFAULT
(hex)
FUNCTION
0x00
DESCRIPTION
Reserved.
2:1
RW
OSC Clock
Source
Allows choosing different OSC clock frequencies for forward channel frame.
OSC clock frequency in functional mode when TMDS clock is not present and 0x03[2]=1:
00: 50 MHz oscillator.
01: 50 MHz oscillator.
10: 100 MHz oscillator.
11: 25 MHz oscillator.
Clock source in BIST mode i.e. when 0x14[0]=1:
00: External pixel clock.
01: 33 MHz oscillator.
1x: 100 MHz oscillator.
0
RW
BIST Enable
BIST control:
0: Disabled (default).
1: Enabled.
21
0x15
I2C Voltage
Select
7:0
RW
0x01
I2C Voltage
Select
Selects 1.8 or 3.3V for the I2C_SDA and I2C_SCL pins. This register is loaded from the
I2C_VSEL strap option from the SCLK pin at power-up. At power-up, a logic LOW will
select 3.3V operation, while a logic HIGH (pull-up resistor attached) will select 1.8V
signaling. Issuing either of the digital resets via register 0x01 will cause the I2C_VSEL
value to be reset to 3.3V operation.
Reads of this register return the status of the I2C_VSEL control:
0: Select 1.8V signaling.
1: Select 3.3V signaling.
This bit may be overwritten via register access or via eFuse program by writing an 8-bit
value to this register:
Write 0xb5 to set I2C_VSEL.
Write 0xb6 to clear I2C_VSEL.
22
0x16
BCC Watchdog
Control
7:1
RW
0xFE
Timer Value
The watchdog timer allows termination of a control channel transaction if it fails to
complete within a programmed amount of time. This field sets the Bidirectional Control
Channel Watchdog Timeout value in units of 2 milliseconds. This field should not be set
to 0. Set to 0x01.
0
RW
Timer Control
Disable Bidirectional Control Channel (BCC) Watchdog Timer:
0: Enable BCC Watchdog Timer operation (default).
1: Disable BCC Watchdog Timer operation.
7
RW
I2C Pass All
0: Enable Forward Control Channel pass-through only of I2C accesses to I2C Slave IDs
matching either the remote Deserializer Slave ID or the remote Slave ID (default).
1: Enable Forward Control Channel pass-through of all I2C accesses to I2C Slave IDs
that do not match the Serializer I2C Slave ID.
6:4
RW
SDA Hold
Time
Internal SDA hold time:
Configures the amount of internal hold time provided for the SDA input relative to the
SCL input. Units are 40 nanoseconds.
3:0
RW
I2C Filter
Depth
Configures the maximum width of glitch pulses on the SCL and SDA inputs that will be
rejected. Units are 5 nanoseconds.
23
40
BIT(S)
0x17
I2C Control
0x1E
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
BIT(S)
REGISTER
TYPE
DEFAULT
(hex)
24
0x18
SCL High Time
7:0
RW
0x7F
TX_SCL_HIGH I2C Master SCL high time:
This field configures the high pulse width of the SCL output when the Serializer is the
Master on the local I2C bus. Units are 40 ns for the nominal oscillator clock frequency.
The default value is set to provide a minimum 5us SCL high time with the internal
oscillator clock running at 26.25MHz rather than the nominal 25MHz. Delay includes 5
additional oscillator clock periods.
Min_delay = 38.0952ns * (TX_SCL_HIGH + 5).
25
0x19
SCL Low Time
7:0
RW
0x7F
TX_SCL_LOW
26
0x1A
Data Path
Control 2
7:4
R
Strap
SECONDARY
_AUDIO
3
0x1B
BIST BC Error
Count
DESCRIPTION
I2C Master SCL low time:
This field configures the low pulse width of the SCL output when the Serializer is the
Master on the local I2C bus. This value is also used as the SDA setup time by the I2C
Slave for providing data prior to releasing SCL during accesses over the Bidirectional
Control Channel. Units are 40 ns for the nominal oscillator clock frequency. The default
value is set to provide a minimum 5us SCL low time with the internal oscillator clock
running at 26.25MHz rather than the nominal 25MHz. Delay includes 5 additional clock
periods.
Min_delay = 38.0952ns * (TX_SCL_LOW + 5).
Reserved.
2
27
FUNCTION
0x01
Enable Secondary Audio.
This register indicates that the AUX audio channel is enabled. The control for this
function is via the AUX_AUDIO bit in the BRIDGE_CFG register register offset 0x54).
The AUX_AUDIO control is strapped from the MODE_SEL0 pin at power-up.
Reserved.
1
RW
MODE_28B
Enable 28-bit Serializer Mode.
0: 24-bit high-speed data + 3 low-speed control (DE, HS, VS).
1: 28-bit high-speed data mode.
0
RW
I2S Surround
Enable 5.1- or 7.1-channel I2S audio transport:
0: 2-channel or 4-channel I2S audio is enabled as configured in register 0x12 bits 3 and
0.
1: 5.1- or 7.1-channel audio is enabled.
Note that I2S Data Island Transport is the only option for surround audio. Also note that
in a repeater, this bit may be overridden by the in-band I2S mode detection (default).
7:0
R
BIST BC Error
BIST back channel CRC error counter.
This register stores the back channel CRC error count during BIST Mode (saturates at
255 errors). Clears when a new BIST is initiated or by 0x04[5].
0x00
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
28
0x1C
GPIO Pin Status
1
BIT(S)
REGISTER
TYPE
DEFAULT
(hex)
7
R
0x00
6
5
FUNCTION
GPIO7_REG
Pin Status
GPIO7_REG input pin status.
Note: status valid only if pin is set to GPI (input) mode.
R
GPIO6_REG
Pin Status
GPIO6_REG input pin status.
Note: status valid only if pin is set to GPI (input) mode.
R
GPIO5_REG
Pin Status
GPIO5_REG input pin status.
Note: status valid only if pin is set to GPI (input) mode.
4
29
30
42
0x1D
0x1E
DESCRIPTION
Reserved.
3
R
GPIO3 Pin
Status
GPIO3 input pin status.
Note: status valid only if pin is set to GPI (input) mode.
2
R
GPIO2 Pin
Status
GPIO2 input pin status.
Note: status valid only if pin is set to GPI (input) mode.
1
R
GPIO1 Pin
Status
GPIO1 input pin status.
Note: status valid only if pin is set to GPI (input) mode.
0
R
GPIO0 Pin
Status
GPIO0 input pin status.
Note: status valid only if pin is set to GPI (input) mode.
GPIO Pin Status
2
7:1
Transmitter Port
Select
7:3
0
0x00
R
Reserved
GPIO8_REG
Pin Status
GPIO8_REG input pin status.
Note: status valid only if pin is set to GPI (input) mode.
Reserved.
2
RW
0x01
PORT1_I2C_E Port1 I2C Enable.
N
Enables secondary I2C address. The second I2C address provides access to Port1
registers as well as registers that are shared between Port0 and Port1. The second I2C
address value will be set to DeviceID + 1 (7-bit format). The PORT1_I2C_EN bit must
also be set to allow accessing remote devices over the second link when the device is in
Replicate mode.
1
RW
PORT1_SEL
Selects Port1 for register access from primary I2C address.
For writes, Port1 registers and shared registers will both be written.
For reads, Port1 registers and shared registers will be read. This bit must be cleared to
read Port0 registers.
This bit is ignored if PORT1_I2C_EN is set.
0
RW
PORT0_SEL
Selects Port0 for register access from primary I2C address.
For writes, Port0 registers and shared registers will both be written.
For reads, Port0 registers and shared registers will be read. Note that if PORT1_SEL is
also set, then Port1 registers will be read.
This bit is ignored if PORT1_I2C_EN is set.
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
31
0x1F
Frequency
Counter
32
0x20
Deserializer
Capabilities 1
BIT(S)
REGISTER
TYPE
DEFAULT
(hex)
7:0
RW
0x00
Frequency
Count
Frequency counter control.
A write to this register will enable a frequency counter to count the number of pixel clock
during a specified time interval. The time interval is equal to the value written multiplied
by the oscillator clock period (nominally 40ns). A read of the register returns the number
of pixel clock edges seen during the enabled interval. The frequency counter will freeze
at 0xff if it reaches the maximum value. The frequency counter will provide a rough
estimate of the pixel clock period. If the pixel clock frequency is known, the frequency
counter may be used to determine the actual oscillator clock frequency.
7
RW
0x00
FREEZE_DES
_CAP
Freeze Deserializer Capabilities.
Prevent auto-loading of the Deserializer Capabilities by the Bidirectional Control Channel.
The Capabilities will be frozen at the values written in registers 0x20 and 0x21.
FUNCTION
6
DESCRIPTION
Reserved.
5
0x00
SEND_FREQ
Send Frequency Training Pattern.
Indicates the DS90UB929-Q1 should send the Frequency Training Pattern. This field is
automatically configured by the Bidirectional Control Channel once RX Lock has been
detected. Software may overwrite this value, but must also set the FREEZE DES CAP bit
to prevent overwriting by the Bidirectional Control Channel.
SEND_EQ
Send Equalization Training Pattern.
Indicates the DS90UB929-Q1 should send the Equalization Training Pattern. This field is
automatically configured by the Bidirectional Control Channel once RX Lock has been
detected. Software may overwrite this value, but must also set the FREEZE DES CAP bit
to prevent overwriting by the Bidirectional Control Channel.
4
RW
3
RW
DUAL_LINK_C Dual link Capabilities.
AP
Indicates if the Deserializer is capable of dual link operation. This field is automatically
configured by the Bidirectional Control Channel once RX Lock has been detected.
Software may overwrite this value, but must also set the FREEZE DES CAP bit to
prevent overwriting by the Bidirectional Control Channel.
2
RW
DUAL_CHANN Dual Channel 0/1 Indication.
EL
In a dual-link capable device, indicates if this is the primary or secondary channel.
0: Primary channel (channel 0).
1: Secondary channel (channel 1).
This field is automatically configured by the Bidirectional Control Channel once RX Lock
has been detected. Software may overwrite this value, but must also set the FREEZE
DES CAP bit to prevent overwriting by the Bidirectional Control Channel.
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
32
0x20
Deserializer
Capabilities 1
33
38
44
0x21
0x26
BIT(S)
REGISTER
TYPE
DEFAULT
(hex)
1
RW
0x00
0
RW
FUNCTION
DESCRIPTION
VID_24B_HD_
AUD
Deserializer supports 24-bit video concurrently with HD audio.
This field is automatically configured by the Bidirectional Control Channel once RX Lock
has been detected. Software may overwrite this value, but must also set the FREEZE
DES CAP bit to prevent overwriting by the Bidirectional Control Channel.
DES_CAP_FC
_GPIO
Deserializer supports GPIO in the Forward Channel Frame.
This field is automatically configured by the Bidirectional Control Channel once RX Lock
has been detected. Software may overwrite this value, but must also set the FREEZE
DES CAP bit to prevent overwriting by the Bidirectional Control Channel.
Deserializer
Capabilities 2
7:2
Reserved.
1:0
Reserved.
Link Detect
Control
7:3
Reserved.
2:0
RW
0x00
LINK DETECT
TIMER
Bidirectional Control Channel Link Detect Timer.
This field configures the link detection timeout period. If the timer expires without valid
communication over the reverse channel, link detect will be deasserted.
000: 162 microseconds.
001: 325 microseconds.
010: 650 microseconds.
011: 1.3 milliseconds.
100: 10.25 microseconds.
101: 20.5 microseconds.
110: 41 microseconds.
111: 82 microseconds.
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SNLS457B – NOVEMBER 2014 – REVISED AUGUST 2019
Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
48
0x30
SCLK_CTRL
BIT(S)
REGISTER
TYPE
DEFAULT
(hex)
7
RW
0x00
6:5
FUNCTION
DESCRIPTION
SCLK/WS
SCLK to Word Select Ratio.
0 : 64.
1 : 32.
RW
MCLK/SCLK
MCLK to SCLK Select Ratio.
00 : 4.
01 : 2.
10 : 1.
11 : 8.
4:3
RW
CLEAN
CLOCK_DIV
Clock Cleaner divider.
00 : FPD_VCO_CLOCK/8.
01 : FPD_VCO_CLOCK/4.
10 : FPD_VCO_CLOCK/2.
11 : AON_OSC.
2:1
RW
CLEAN Mode
If non-zero, the SCLK Input or HDMI N/CTS generated Audio Clock is cleaned digitally
before being used.
00 : Off.
01 : ratio of 1.
10 : ratio of 2.
11 : ratio of 4.
0
RW
MASTER
If set, the SCLK I/O and the WS_IO are used as an output and the Clock Generation
Circuits are enabled, otherwise they are inputs.
49
0x31
AUDIO_CTS0
7:0
RW
0x00
CTS[7:0]
If non-zero, the CTS value is used to generate a new clock from the PFD PLLs VCO.
50
0x32
AUDIO_CTS1
7:0
RW
0x00
CTS[15:8]
If non-zero, the CTS value is used to generate a new clock from the PFD PLLs VCO.
51
0x33
AUDIO_CTS2
7:0
RW
0x00
CTS[23:16]
If non-zero, the CTS value is used to generate a new clock from the PFD PLLs VCO.
52
0x34
AUDIO_N0
7:0
RW
0x00
N[7:0]
If non-zero, the CTS value is used to generate a new clock from the PFD PLLs VCO.
53
0x35
AUDIO_N1
7:0
RW
0x00
N[15:8]
If non-zero, the CTS value is used to generate a new clock from the PFD PLLs VCO.
54
0x36
AUDIO_N2_CO
EFF
7:4
RW
0x00
COEFF[3:0]
Selects the LPF_COEFF in the Clock Cleaner (Feedback is divided by 2^COEFF).
3:0
RW
0x00
N[19:16]
If non-zero, the CTS value is used to generate a new clock from the PFD PLLs VCO.
CLK_CLEAN_ST
S
7:6
55
0x37
Reserved.
5:3
R
0x00
IN_FIFO_LVL
2:0
R
0x00
OUT_FIFO_LV Clock Cleaner Output FIFO Level.
L
Clock Cleaner Input FIFO Level.
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
46
ADD
(dec)
ADD
(hex)
REGISTER
NAME
64
0x40
ANA_IA_CNTL
BIT(S)
REGISTER
TYPE
7:5
DEFAULT
(hex)
FUNCTION
0x00
DESCRIPTION
Reserved.
4:2
RW
ANA_IA_SEL
Analog register select
Selects target for register access
000b: Disabled
001b - 011b: Reserved
100b: HDMI Registers
101b: FPD3 TX Registers
11xb: Reserved
1
RW
ANA_AUTO_I
NC
Analog Register Auto Increment
0: Disable auto-increment mode
1: Enable auto-increment mode. Upon completion of a read or write, the register address
will automatically be incremented by 1.
0
RW
ANA_IA_REA
D
Start Analog Register Read
0: Write analog register
1: Read analog register
Analog register offset
This register contains the 8-bit register offset for the indirect access.
65
0x41
ANA_IA_ADDR
7:0
RW
0x00
ANA_IA_ADD
R
66
0x42
ANA_IA_DATA
7:0
RW
0x00
ANA_IA_DATA Analog register data
Writing this register will cause an indirect write of the ANA_IA_DATA value to the
selected analog block register. Reading this register will return the value of the selected
analog block register.
72
0x48
APB_CTL
7:5
Reserved.
4:3
RW
2
0x00
APB_SELECT
APB Select: Selects target for register access.
00 : HDMI APB interface.
01 : EDID SRAM.
10 : Configuration Data (read only).
11 : Die ID (read only).
RW
APB_AUTO_I
NC
APB Auto Increment: Enables auto-increment mode. Upon completion of an APB read or
write, the APB address will automatically be incremented by 0x4 for HDMI registers or by
0x1 for others.
1
RW
APB_READ
Start APB Read: Setting this bit to a 1 will begin an APB read. Read data will be available
in the APB_DATAx registers. The APB_ADRx registers should be programmed prior to
setting this bit. This bit will be cleared when the read is complete.
0
RW
APB_ENABLE
APB Interface Enable: Set to a 1 to enable the APB interface. The APB_SELECT bits
indicate what device is selected.
73
0x49
APB_ADR0
7:0
RW
0x00
APB_ADR0
APB Address byte 0 (LSB).
74
0x4A
APB_ADR1
7:0
RW
0x00
APB_ADR1
APB Address byte 1 (MSB).
75
0x4B
APB_DATA0
7:0
RW
0x00
APB_DATA0
Byte 0 (LSB) of the APB Interface Data.
76
0x4C
APB_DATA1
7:0
RW
0x00
APB_DATA1
Byte 1 of the APB Interface Data.
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
77
0x4D
78
0x4E
79
0x4F
80
0x50
BIT(S)
REGISTER
TYPE
DEFAULT
(hex)
APB_DATA2
7:0
RW
0x00
APB_DATA2
Byte 2 of the APB Interface Data.
APB_DATA3
7:0
RW
0x00
APB_DATA3
Byte 3 (MSB) of the APB Interface Data.
BRIDGE_CTL
7:5
BRIDGE_STS
FUNCTION
DESCRIPTION
Reserved.
4
RW
3
0x00
CEC_CLK_SR
C
CEC Clock Source Select: Selects clock source for generating the 32.768kHz clock for
CEC operations in the HDMI Receive Controller.
0 : Selects internal generated clock.
1 : Selects external 25MHz oscillator clock.
RW
CEC_CLK_EN
CEC Clock Enable: Enable CEC clock generation. Enables generation of the 32.768kHz
clock for the HDMI Receive controller. This bit should be set prior to enabling CEC
operation via the HDMI controller registers.
2
RW
EDID_CLEAR
Clear EDID SRAM: Set to 1 to enable clearing the EDID SRAM. The EDID_INIT bit must
be set at the same time for the clear to occur. This bit will be cleared when the
initialization is complete.
1
RW
EDID_INIT
Initialize EDID SRAM from EEPROM: Causes a reload of the EDID SRAM from the nonvolatile EDID EEPROM. This bit will be cleared when the initialization is complete.
0
R
Strap
EDID_DISABL
E
Disable EDID access via DDC/I2C: Disables access to the EDID SRAM via the HDMI
DDC interface. This value is loaded from the MODE_SEL0 pin at power-up.
7
R
0x03
RX5V_DETEC
T
RX +5V detect: Indicates status of the RX_5V pin. When asserted, indicates the HDMI
interface has detected valid voltage on the RX_5V input.
6
R
HDMI_INT
HDMI Interrupt Status: Indicates an HDMI Interrupt is pending. HDMI interrupts are
serviced through the HDMI Registers via the APB Interface.
4
R
INIT_DONE
Initialization Done: Initialization sequence has completed. This step will complete after
configuration complete (CFG_DONE).
3
R
REM_EDID_L
OAD
Remote EDID Loaded: Indicates EDID SRAM has been loaded from a remote EDID
EEPROM device over the Bidirectional Control Channel. The EDID_CKSUM value
indicates if the EDID load was successful.
2
R
CFG_DONE
Configuration Complete: Indicates automatic configuration has completed. This step will
complete prior to initialization complete (INIT_DONE).
1
R
CFG_CKSUM
Configuration checksum status: Indicates result of Configuration checksum during
initialization. The device verifies the 2’s complement checksum in the last 128 bytes of
the EEPROM. A value of 1 indicates the checksum passed.
0
R
EDID_CKSUM
EDID checksum Status: Indicates result of EDID checksum during EDID initialization. The
device verifies the 2’s complement checksum in the first 256 bytes of the EEPROM. A
value of 1 indicates the checksum passed.
5
Reserved.
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
81
0x51
EDID_ID
82
83
0x52
0x53
EDID_CFG0
EDID_CFG1
BIT(S)
REGISTER
TYPE
DEFAULT
(hex)
7:1
RW
0x50
0
RW
6:4
3:0
DESCRIPTION
EDID_ID
EDID I2C Slave Address: I2C address used for accessing the EDID information. These
are the upper 7 bits in 8-bit format addressing, where the lowest bit is the Read/Write
control.
0
EDID_RDONL
Y
EDID Read Only: Set to a 1 puts the EDID SRAM memory in read-only mode for access
via the HDMI DDC interface. Setting to a 0 allows writes to the EDID SRAM memory.
RW
0x01
EDID_SDA_H
OLD
RW
0x0E
EDID_FLTR_D I2C Glitch Filter Depth: This field configures the maximum width of glitch pulses on the
PTH
DDC_SCL and DDC_SDA inputs that will be rejected. Units are 5 nanoseconds.
RW
0x00
EDID_SDA_DL SDA Output Delay: This field configures output delay on the DDC_SDA output when the
Y
EDID memory is accessed. Setting this value will increase output delay in units of 40ns.
Nominal output delay values for DDC_SCL to DDC_SDA are:
00 : 240ns.
01 : 280ns.
10 : 320ns.
11 : 360ns.
7
Reserved.
7:2
1:0
48
FUNCTION
Internal SDA Hold Time: This field configures the amount of internal hold time provided
for the DDC_SDA input relative to the DDC_SCL input. Units are 40 nanoseconds. The
hold time is used to qualify the start detection to avoid false detection of Start or Stop
conditions.
Reserved.
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
84
0x54
BRIDGE_CFG
BIT(S)
REGISTER
TYPE
DEFAULT
(hex)
7
RW
Strap
EXT_CTL
6
RW
0x00
HDMI_INT_EN HDMI Interrupt Enable: When this bit is set, Interrupts from the HDMI Receive controller
will be reported on the INTB pin. Software may check the BRIDGE_STS register to
determine if the interrupt is from the HDMI Receiver.
5
RW
Strap
DIS_REM_EDI Disable Remote EDID load: Disables automatic load of EDID SRAM from a remote EDID
D
EEPROM. By default, the device will check the remote I2C bus for an EEPROM with a
valid EDID, and load the EDID data to local EDID SRAM. If this bit is set to a 1, the
remote EDID load will be bypassed. This value is loaded from the MODE_SEL1 pin at
power-up.
4
RW
0x00
AUTO_INIT_DI Disable Automatic initialization: The Bridge control will automatically initialize the HDMI
S
Receiver for operation. Setting this bit to a 1 will disable automatic initialization of the
HDMI Receiver. In this mode, initialization of the HDMI Receiver must be done through
EEPROM configuration or via external control.
2
RW
0x00
AUDIO_TDM
1
RW
0
RW
FUNCTION
3
DESCRIPTION
External Control: When this bit Is set, the internal bridge control function is disabled. This
disables initialization of the HDMI Receiver. These operations must be controlled by an
external controller attached to the I2C interface. This value is loaded from the
MODE_SEL1 pin at power-up.
Reserved.
Enable TDM Audio: Setting this bit to a 1 will enable TDM audio for the HDMI audio.
AUDIO_MODE Audio Mode: Selects source for audio to be sent over the FPD-Link III downstream link.
0 : HDMI audio.
1 : Local/DVI audio.
Local audio is sourced from the device I2S pins rather than from HDMI, and is useful in
modes such as DVI that do not include audio.
Strap
AUX_AUDIO_
EN
AUX Audio Channel Enable: Setting this bit to a 1 will enable the AUX audio channel.
This allows sending additional 2-channel audio in addition to the HDMI or DVI audio. This
bit is loaded from the MODE_SEL0 pin at power-up.
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
85
0x55
AUDIO_CFG
BIT(S)
REGISTER
TYPE
DEFAULT
(hex)
7
RW
0x00
6
RW
FUNCTION
TDM_2_PARA
LLEL
50
0x5A
FPD3_STS
Enable I2S TDM to parallel audio conversion: When this bit is set, the i2s tdm to parallel
conversion module is enabled. The clock output from the i2s tdm to parallel conversion
module is them used to send data to the deserializer.
HDMI_I2S_OU HDMI Audio Output Enable: When this bit is set, the HDMI I2S audio data will be output
T
on the I2S audio interface pins. This control is ignored if the
BRIDGE_CFG:AUDIO_MODE is not set to 00 (HDMI audio only).
5:4
90
DESCRIPTION
Reserved.
3
RW
2
0x0C
RST_ON_TYP
E
Reset Audio FIFO on Type Change: When this bit is set, the internal bridge control
function will reset the HDMI Audio FIFO on a change in the Audio type.
RW
RST_ON_AIF
Reset Audio FIFO on Audio Infoframe: When this bit is set, the internal bridge control
function will reset the HDMI Audio FIFO on a change in the Audio Infoframe checksum.
1
RW
RST_ON_AVI
Reset Audio FIFO on Audio Video Information Infoframe: When this bit is set, the internal
bridge control function will reset the HDMI Audio FIFO on a change in the Audio Video
Information Infoframe checksum.
0
RW
RST_ON_ACR Reset Audio FIFO on Audio Control Frame: When this bit is set, the internal bridge
control function will reset the HDMI Audio FIFO on a change in the Audio Control Frame
N or CTS fields.
7
R
6
0x00
FPD3_LINK_R
DY
This bit indicates that the FPD-Link III has detected a valid downstream connection and
determined capabilities for the downstream link.
R
FPD3_TX_ST
S
FPD-Link III transmit status:
This bit indicates that the FPD-Link III transmitter is active and the receiver is LOCKED to
the transmit clock. It is only asserted once a valid input has been detected, and the FPDLink III transmit connection has entered the correct mode (Single vs. Dual mode).
5:4
R
FPD3_PORT_
STS
FPD3 Port Status: If FPD3_TX_STS is set to a 1, this field indicates the port mode status
as follows:
01: Single FPD-Link III Transmit on port 0.
3
R
TMDS_VALID
HDMI TMDS Valid: This bit indicates the TMDS interface is recovering valid TMDS data
from HDMI.
2
R
HDMI_PLL_LO HDMI PLL lock status: Indicates the HDMI PLL has locked to the incoming TMDS clock.
CK
1
R
NO_HDMI_CL
K
No TMDS Clock Detected: This bit indicates the Frequency Detect circuit did not detect
an TMDS clock greater than the value specified in the FREQ_LOW register.
0
R
FREQ_STABL
E
HDMI Frequency is Stable: Indicates the Frequency Detection circuit has detected a
stable TMDS clock frequency.
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
BIT(S)
REGISTER
TYPE
DEFAULT
(hex)
91
0x5B
FPD3_CTL1
7
RW
Strap
FPD3_COAX_
MODE
5
RW
1
RST_PLL_FR
EQ
Reset FPD3 PLL on Frequency Change: When set to a 1, frequency changes detected
by the Frequency Detect circuit will result in a reset of the FPD3 PLL. Set to 0.
4
RW
0
FREQ_DET_P
LL
Frequency Detect Select PLL Clock: Determines the clock source for the Frequency
detection circuit:
0 : TMDS clock (prior to PLL).
1: HDMI PLL clock.
FUNCTION
6
92
93
0x5C
0x5D
FPD3_CTL2
FREQ_LOW
DESCRIPTION
FPD3 Coax Mode: Enables configuration for the FPD3 Interface cabling type.
0 : Twisted Pair.
1 : Coax This bit is loaded from the MODE_SEL1 pin at power-up.
Reserved.
3
Reserved.
2
Reserved.
1
Reserved.
0
Reserved.
7
Reserved.
6
RW
0x00
FORCE_LINK_ Force Link Ready: Forces link ready indication, bypassing back channel link detection.
RDY
5
RW
FORCE_CLK_
DET
Force Clock Detect: Forces the HDMI/OpenLDI clock detect circuit to indicate presence
of a valid input clock. This bypasses the clock detect circuit, allowing operation with an
input clock that does not meet frequency or stability requirements.
4:3
RW
FREQ_STBL_
THR
Frequency Stability Threshold: The Frequency detect circuit can be used to detect a
stable clock frequency. The Stability Threshold determines the amount of time required
for the clock frequency to stay within the FREQ_HYST range to be considered stable:
00 : 40us.
01 : 80us.
10 : 320us.
11 : 1.28ms.
2:0
RW
0x02
FREQ_HYST
Frequency Detect Hysteresis: The Frequency detect hysteresis setting allows ignoring
minor fluctuations in frequency. A new frequency measurement will be captured only if
the measured frequency differs from the current measured frequency by more than the
FREQ_HYST setting. The FREQ_HYST setting is in MHz.
6
RW
0
HDMI_RST_M
ODE
HDMI Phy Reset Mode:
0 : Reset HDMI Phy on change in mode or frequency.
1 : Don't reset HDMI Phy on change in mode or frequency if +5 V is asserted.
5:0
RW
6
FREQ_LO_TH
R
Frequency Low Threshold: Sets the low threshold for the TMDS Clock frequency detect
circuit in MHz. This value is used to determine if the TMDS clock frequency is too low for
proper operation.
7
Reserved.
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
BIT(S)
REGISTER
TYPE
DEFAULT
(hex)
95
0x5F
HDMI Frequency
7:0
R
0x00
HDMI_FREQ
HDMI frequency:
Returns the value of the HDMI frequency in MHz. A value of 0 indicates the HDMI
receiver is not detecting a valid signal.
100
0x64
Pattern
Generator
Control
7:4
RW
0x10
Pattern
Generator
Select
Fixed Pattern Select
Selects the pattern to output when in Fixed Pattern Mode. Scaled patterns are evenly
distributed across the horizontal or vertical active regions. This field is ignored when
Auto-Scrolling Mode is enabled.
xxxx: normal/inverted.
0000: Checkerboard.
0001: White/Black (default).
0010: Black/White.
0011: Red/Cyan.
0100: Green/Magenta.
0101: Blue/Yellow.
0110: Horizontal Black-White/White-Black.
0111: Horizontal Black-Red/White-Cyan.
1000: Horizontal Black-Green/White-Magenta.
1001: Horizontal Black-Blue/White-Yellow.
1010: Vertical Black-White/White-Black.
1011: Vertical Black-Red/White-Cyan.
1100: Vertical Black-Green/White-Magenta.
1101: Vertical Black-Blue/White-Yellow.
1110: Custom color (or its inversion) configured in PGRS, PGGS, PGBS registers.
1111: VCOM.
See TI App Note AN-2198.
FUNCTION
3
52
DESCRIPTION
Reserved.
2
RW
Color Bars
Pattern
Enable color bars:
0: Color Bars disabled (default).
1: Color Bars enabled.
Overrides the selection from reg_0x64[7:4].
1
RW
VCOM Pattern
Reverse
Reverse order of color bands in VCOM pattern:
0: Color sequence from top left is (YCBR) (default).
1: Color sequence from top left is (RBCY).
0
RW
Pattern
Generator
Enable
Pattern Generator enable:
0: Disable Pattern Generator (default).
1: Enable Pattern Generator.
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
101
0x65
Pattern
Generator
Configuration
102
0x66
PGIA
BIT(S)
REGISTER
TYPE
7
DEFAULT
(hex)
FUNCTION
0x00
DESCRIPTION
Reserved.
6
RW
Checkerboard
Scale
Scale Checkered Patterns:
0: Normal operation (each square is 1x1 pixel) (default).
1: Scale checkered patterns (VCOM and checkerboard) by 8 (each square is 8x8 pixels).
Setting this bit gives better visibility of the checkered patterns.
5
RW
Custom
Checkerboard
Use Custom Checkerboard Color:
0: Use white and black in the Checkerboard pattern (default).
1: Use the Custom Color and black in the Checkerboard pattern.
4
RW
PG 18–bit
Mode
18-bit Mode Select:
0: Enable 24-bit pattern generation. Scaled patterns use 256 levels of brightness
(default).
1: Enable 18-bit color pattern generation. Scaled patterns will have 64 levels of
brightness and the R, G, and B outputs use the six most significant color bits.
3
RW
External Clock
Select External Clock Source:
0: Selects the internal divided clock when using internal timing (default).
1: Selects the external pixel clock when using internal timing.
This bit has no effect in external timing mode (PATGEN_TSEL = 0).
2
RW
Timing Select
Timing Select Control:
0: The Pattern Generator uses external video timing from the pixel clock, Data Enable,
Horizontal Sync, and Vertical Sync signals (default).
1: The Pattern Generator creates its own video timing as configured in the Pattern
Generator Total Frame Size, Active Frame Size. Horizontal Sync Width, Vertical Sync
Width, Horizontal Back Porch, Vertical Back Porch, and Sync Configuration registers.
See Exploring the Internal Test Pattern Generation Feature of 720p FPD-Link III Devices
(SNLA132).
1
RW
Color Invert
Enable Inverted Color Patterns:
0: Do not invert the color output (default).
1: Invert the color output.
See Exploring the Internal Test Pattern Generation Feature of 720p FPD-Link III Devices
(SNLA132).
0
RW
Auto Scroll
Auto Scroll Enable:
0: The Pattern Generator retains the current pattern (default).
1: The Pattern Generator will automatically move to the next enabled pattern after the
number of frames specified in the Pattern Generator Frame Time (PGFT) register.
See Exploring the Internal Test Pattern Generation Feature of 720p FPD-Link III Devices
(SNLA132).
7:0
RW
PG Indirect
Address
This 8-bit field sets the indirect address for accesses to indirectly-mapped registers. It
should be written prior to reading or writing the Pattern Generator Indirect Data register.
See Exploring the Internal Test Pattern Generation Feature of 720p FPD-Link III Devices
(SNLA132).
0x00
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
BIT(S)
REGISTER
TYPE
DEFAULT
(hex)
103
0x67
PGID
7:0
RW
0x00
PG Indirect
Data
When writing to indirect registers, this register contains the data to be written. When
reading from indirect registers, this register contains the read back value.
See Exploring the Internal Test Pattern Generation Feature of 720p FPD-Link III Devices
(SNLA132).
112
0x70
Slave ID[1]
7:1
RW
0x00
Slave ID 1
7-bit I2C address of the remote Slave 1 attached to the remote Deserializer. If an I2C
transaction is addressed to Slave Alias ID 1, the transaction will be remapped to this
address before passing the transaction across the Bidirectional Control Channel to the
Deserializer. A value of 0 in this field disables access to the remote Slave 1.
113
0x71
Slave ID[2]
7:1
RW
0x00
Slave ID 2
FUNCTION
0
Reserved.
0
114
0x72
Slave ID[3]
7:1
115
0x73
Slave ID[4]
7:1
116
0x74
Slave ID[5]
7:1
RW
0x00
Slave ID 3
RW
0x00
Slave ID 4
RW
0x00
Slave ID 5
7:1
118
0x76
Slave ID[7]
7:1
54
7-bit I2C address of the remote Slave 5 attached to the remote Deserializer. If an I2C
transaction is addressed to Slave Alias ID 5, the transaction will be remapped to this
address before passing the transaction across the Bidirectional Control Channel to the
Deserializer. A value of 0 in this field disables access to the remote Slave 5.
Reserved.
RW
0x00
Slave ID 6
RW
0x00
Slave ID 7
0
0
7-bit I2C address of the remote Slave 4 attached to the remote Deserializer. If an I2C
transaction is addressed to Slave Alias ID 4, the transaction will be remapped to this
address before passing the transaction across the Bidirectional Control Channel to the
Deserializer. A value of 0 in this field disables access to the remote Slave 4.
Reserved.
0
Slave ID[6]
7-bit I2C address of the remote Slave 3 attached to the remote Deserializer. If an I2C
transaction is addressed to Slave Alias ID 3, the transaction will be remapped to this
address before passing the transaction across the Bidirectional Control Channel to the
Deserializer. A value of 0 in this field disables access to the remote Slave 3.
Reserved.
0
0x75
7-bit I2C address of the remote Slave 2 attached to the remote Deserializer. If an I2C
transaction is addressed to Slave Alias ID 2, the transaction will be remapped to this
address before passing the transaction across the Bidirectional Control Channel to the
Deserializer. A value of 0 in this field disables access to the remote Slave 2.
Reserved.
0
117
DESCRIPTION
7-bit I2C address of the remote Slave 6 attached to the remote Deserializer. If an I2C
transaction is addressed to Slave Alias ID 6, the transaction will be remapped to this
address before passing the transaction across the Bidirectional Control Channel to the
Deserializer. A value of 0 in this field disables access to the remote Slave 6.
Reserved.
7-bit I2C address of the remote Slave 7 attached to the remote Deserializer. If an I2C
transaction is addressed to Slave Alias ID 7, the transaction will be remapped to this
address before passing the transaction across the Bidirectional Control Channel to the
Deserializer. A value of 0 in this field disables access to the remote Slave 7.
Reserved.
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
BIT(S)
REGISTER
TYPE
DEFAULT
(hex)
119
0x77
Slave Alias[1]
7:1
RW
0x00
Slave Alias ID
1
120
0x78
Slave Alias[2]
7:1
RW
0x00
Slave Alias ID
2
121
0x79
Slave Alias[3]
7:1
RW
0x00
Slave Alias ID
3
122
0x7A
Slave Alias[4]
7:1
RW
0x00
Slave Alias ID
4
123
0x7B
Slave Alias[5]
7:1
RW
0x00
Slave Alias ID
5
124
0x7C
Slave Alias[6]
7:1
RW
0x00
Slave Alias ID
6
125
0x7D
Slave Alias[7]
7:1
RW
0x00
Slave Alias ID
7
FUNCTION
0
7-bit Slave Alias ID of the remote Slave 1 attached to the remote Deserializer. The
transaction will be remapped to the address specified in the Slave ID 1 register. A value
of 0 in this field disables access to the remote Slave 1.
Reserved.
0
7-bit Slave Alias ID of the remote Slave 2 attached to the remote Deserializer. The
transaction will be remapped to the address specified in the Slave ID 2 register. A value
of 0 in this field disables access to the remote Slave 2.
Reserved.
0
7-bit Slave Alias ID of the remote Slave 3 attached to the remote Deserializer. The
transaction will be remapped to the address specified in the Slave ID 3 register. A value
of 0 in this field disables access to the remote Slave 3.
Reserved.
0
7-bit Slave Alias ID of the remote Slave 4 attached to the remote Deserializer. The
transaction will be remapped to the address specified in the Slave ID 4 register. A value
of 0 in this field disables access to the remote Slave 4.
Reserved.
0
7-bit Slave Alias ID of the remote Slave 5 attached to the remote Deserializer. The
transaction will be remapped to the address specified in the Slave ID 5 register. A value
of 0 in this field disables access to the remote Slave 5.
Reserved.
0
0
DESCRIPTION
7-bit Slave Alias ID of the remote Slave 6 attached to the remote Deserializer. The
transaction will be remapped to the address specified in the Slave ID 6 register. A value
of 0 in this field disables access to the remote Slave 6.
Reserved.
7-bit Slave Alias ID of the remote Slave 7 attached to the remote Deserializer. The
transaction will be remapped to the address specified in the Slave ID 7 register. A value
of 0 in this field disables access to the remote Slave 7.
Reserved.
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Register Maps (continued)
Table 8. Serial Control Bus Registers (continued)
ADD
(dec)
ADD
(hex)
REGISTER
NAME
198
0xC6
ICR
199
0xC7
ISR
BIT(S)
REGISTER
TYPE
DEFAULT
(hex)
7
RW
0x00
6
FUNCTION
DESCRIPTION
IE_IND_ACC
Interrupt on Indirect Access Complete: Enables interrupt on completion of Indirect
Register Access.
RW
IE_RXDET_IN
T
Interrupt on Receiver Detect: Enables interrupt on detection of a downstream Receiver.
5
RW
IE_RX_INT
Interrupt on Receiver interrupt: Enables interrupt on indication from the Receiver. Allows
propagation of interrupts from downstream devices.
4
RW
IE_LIST_RDY
Interrupt on KSV List Ready: Enables interrupt on KSV List Ready.
3
RW
IE_KSV_RDY
Interrupt on KSV Ready: Enables interrupt on KSV Ready.
2
RW
IE_AUTH_FAI
L
Interrupt on Authentication Failure: Enables interrupt on authentication failure or loss of
authentication.
1
RW
IE_AUTH_PAS Interrupt on Authentication Pass: Enables interrupt on successful completion of
S
authentication.
0
RW
7
R
6
INT_EN
Global Interrupt Enable: Enables interrupt on the interrupt signal to the controller.
IS_IND_ACC
Interrupt on Indirect Access Complete: Indirect Register Access has completed.
R
IS_RXDET_IN
T
Interrupt on Receiver Detect interrupt: A downstream receiver has been detected.
5
R
IS_RX_INT
Interrupt on Receiver interrupt: Receiver has indicated an interrupt request from downstream device.
4
R
IS_LIST_RDY
Interrupt on KSV List Ready: The KSV list is ready for reading by the controller.
3
R
IS_KSV_RDY
Interrupt on KSV Ready: The Receiver KSV is ready for reading by the controller.
2
R
IS_AUTH_FAI
L
Interrupt on Authentication Failure: Authentication failure or loss of authentication has
occurred.
1
R
IS_AUTH_PAS Interrupt on Authentication Pass: Authentication has completed successfully.
S
0x00
0
R
INT
Global Interrupt: Set if any enabled interrupt is indicated.
7:0
R
0x5F
ID0
First byte ID code: "_".
0xF1
7:0
R
0x55
ID1
Second byte of ID code: "U".
242
0xF2
7:0
R
0x42
ID2
Third byte of ID code: "B".
243
0xF3
7:0
R
0x39
ID3
Fourth byte of ID code: "9".
244
0xF4
7:0
R
0x32
ID4
Fifth byte of ID code: "2".
245
0xF5
7:0
R
0x39
ID5
Sixth byte of ID code: “9”.
240
0xF0
241
TX ID
NOTE
Registers 0x40, 0x41, and 0x42 of the Serial Control Bus Registers are used to access the Page 0x10 and 0x14 registers.
56
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Register Maps (continued)
Table 9. Page 0x10 Register
ADD
(dec)
ADD
(hex)
REGISTER
NAME
73
0x49
OLDI_PLL_STA
TE_MC_CNTL
BIT(S)
REGISTER
TYPE
7:5
4
DEFAULT
(hex)
FUNCTION
0x00
RW
DESCRIPTION
Reserved
OLDI_STATE_ Enable HDMI PLL reset state
MC_RESET
0: Disable state machine reset (normal operation).
1: Enable state machine reset.
3:0
Reserved, when writing to this register always write '0000b to these bits.
Table 10. Page 0x14 Register
ADD
(dec)
ADD
(hex)
REGISTER
NAME
73
0x49
FPD_PLL_STAT
E_MC_CNTL
BIT(S)
REGISTER
TYPE
7:5
4
3:0
DEFAULT
(hex)
FUNCTION
0x00
RW
DESCRIPTION
Reserved
FPD_STATE_
MC_RESET
Enable FPD PLL reset state
0: Disable state machine reset (normal operation).
1: Enable state machine reset.
Reserved, when writing to this register always write '0000b to these bits.
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8 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Applications Information
The DS90UB929-Q1, in conjunction with the DS90UB926Q-Q1/DS90UB928Q-Q1deserializer, is intended to
interface between a host (graphics processor) and a display, supporting 24-bit color depth (RGB888) and high
definition (720p) digital video format. It can receive an 8-bit RGB stream with a pixel clock rate up to 96 MHz
together with four I2S audio streams when paired with the DS90UB940-Q1/DS90UB948-Q1 deserializer.
8.2 Typical Applications
Bypass capacitors should be placed near the power supply pins. A capacitor and resistor are placed on the PDB
pin to delay the enabling of the device until power is stable. See and for typical STP and coax connection
diagrams.
58
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Typical Applications (continued)
VDD18
(Filtered 1.8V)
1.8V
FB1
10µF
1µF
0.01µF
- 0.1µF
0.1µF
0.01µF
- 0.1µF
VDD18
VDDHA11
VDD18
0.1µF
FB2
10µF
1µF
10µF
0.01µF
- 0.1µF
VDDHS11
0.01µF
- 0.1µF
VDDL11
VDDHS11
VDDL11
VDDS11
FB4
0.01µF
- 0.1µF
0.01µF
- 0.1µF
3.3V (DC coupled)/1.8V (AC coupled)
1µF
VDDHA11
0.01µF
- 0.1µF
0.1µF
0.1µF
FB3
0.01µF
- 0.1µF
VDDIO
1.1V
10µF
VDDHA11
VDDIO
1µF
1µF
0.01µF
- 0.1µF
VDD18
0.1µF
0.1µF
VDDHA11
0.01µF
- 0.1µF
1µF
1.1V
0.01µF
- 0.1µF
0.01µF
- 0.1µF
VDDA11
0.01µF
- 0.1µF
VTERM
FB5
VDDP11
0.01µF
0.01µF
- 0.1µF
IN_CLK+
IN_CLKTMDS
(DC coupled)
C1
C2
DOUT+
DOUT-
IN_D0+
IN_D0-
FPD-Link III
50
IN_D1+
IN_D1LFT
IN_D2+
IN_D2-
10nF
VDD18
(Filtered 1.8V)
R1
IDx
R2
0.1µF
R3
MODE_SEL0
Hot Plug Detect
R4
RX_5V
HPD
1k
0.1µF
R5
MODE_SEL1
R6
3.3V
27k
47k
0.1µF
47k
DDC_SDA
DDC_SCL
CEC
HDMI Control
VDDI2C
1.8V
4.7k 4.7k 4.7k
SDA
SCL
INTB
REM_INTB
1.8V
10k
PDB
Controller (Optional)
>10µF
REF CLKIN
4.7k
I2C
Interrupts
X1
SCLK
SWC
SDIN
MCLK
I2S_WC
I2S_CLK
I2S_DA
I2S_DB
I2S_DC
I2S_DD
I2S Audio
float
RES0
RES1
RES2
DAP
NC[8:0]
Aux Audio
NOTE:
50
FB1,FB5: DCR<=0.3Ohm; Z=1Kohm@100MHz
FB2-FB4: DCR<=25mOhm; Z=120ohm@100MHz
C1 = 0.033µF (50 WV; 0402)
C2 = 0.015µF (50 WV; 0402)
R1 ± R2 (see IDx Resistor Values Table)
R3 ± R6 (see MODE_SEL Resistor Values Table)
VDDI2C = Pull up voltage of I2C bus. Refer to I2CSEL pin
description for 1.8V or 3.3V operation.
DS90UB929-Q1
Figure 21. Typical Application Connection -- Coax
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Typical Applications (continued)
VDD18
(Filtered 1.8V)
1.8V
FB1
10µF
1µF
0.01µF
- 0.1µF
0.1µF
0.01µF
- 0.1µF
VDD18
VDDHA11
VDD18
0.1µF
FB2
10µF
1µF
10µF
0.01µF
- 0.1µF
VDDHS11
0.01µF
- 0.1µF
VDDL11
VDDHS11
VDDL11
VDDS11
FB4
0.01µF
- 0.1µF
0.01µF
- 0.1µF
3.3V (DC coupled)/1.8V (AC coupled)
1µF
VDDHA11
0.01µF
- 0.1µF
0.1µF
0.1µF
FB3
0.01µF
- 0.1µF
VDDIO
1.1V
10µF
VDDHA11
VDDIO
1µF
1µF
0.01µF
- 0.1µF
VDD18
0.1µF
0.1µF
VDDHA11
0.01µF
- 0.1µF
1µF
1.1V
0.01µF
- 0.1µF
0.01µF
- 0.1µF
VDDA11
0.01µF
- 0.1µF
VTERM
FB5
VDDP11
0.01µF
0.01µF
- 0.1µF
IN_CLK+
IN_CLKTMDS
(DC coupled)
C1
C2
DOUT+
DOUT-
IN_D0+
IN_D0-
FPD-Link III
IN_D1+
IN_D1LFT
IN_D2+
IN_D2-
10nF
VDD18
(Filtered 1.8V)
R1
IDx
R2
0.1µF
R3
MODE_SEL0
Hot Plug Detect
R4
RX_5V
HPD
1k
0.1µF
R5
MODE_SEL1
R6
3.3V
27k
47k
0.1µF
47k
DDC_SDA
DDC_SCL
CEC
HDMI Control
VDDI2C
1.8V
4.7k 4.7k 4.7k
SDA
SCL
INTB
REM_INTB
1.8V
10k
PDB
Controller (Optional)
>10µF
REF CLKIN
4.7k
I2C
Interrupts
X1
SCLK
SWC
SDIN
MCLK
I2S_WC
I2S_CLK
I2S_DA
I2S_DB
I2S_DC
I2S_DD
I2S Audio
float
RES0
RES1
RES2
DAP
NC[8:0]
Aux Audio
50
NOTE:
FB1,FB5: DCR<=0.3Ohm; Z=1Kohm@100MHz
FB2-FB4: DCR<=25mOhm; Z=120ohm@100MHz
C1-C2 = 0.1µF (50 WV; 0402) with DS90UB926/928
C1-C2 = 0.033µF (50 WV; 0402) with DS90UB940/948
R1 ± R2 (see IDx Resistor Values Table)
R3 ± R6 (see MODE_SEL Resistor Values Table)
VDDI2C = Pull up voltage of I2C bus. Refer to I2CSEL pin
description for 1.8V or 3.3V operation.
DS90UB929-Q1
Figure 22. Typical Application Connection -- STP
60
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Typical Applications (continued)
VDDIO
1.8V
Mobile Device
/Graphics
Processor
TMDS Interface
HDMI
3.3V
1.1V
VDDIO
1.8V or 3.3V
RIN-
R[7:0]
G[7:0]
B[7:0]
HS
VS
DE
PCLK
DS90UB926Q-Q1
Deserializer
LOCK
PASS
FPD-Link III
1 Pair / AC Coupled
IN_CLK+
IN_D0+
DOUT+
IN_D1+
IN_D2+
CEC
DDC
HPD
GPIO
RIN+
DOUTPDB
OSS_SEL
OEN
MODE_SEL
DS90UB929-Q1
Serializer
4
/
3
/
INTB_IN
I2C_SCL
I2C_SDA
IDx
SCL
SDA
IDx
DAP
RGB Display
720p
24-bit color depth
I2S AUDIO
(STEREO)
MCLK
DAP
TMDS ± Transition-Minimized Differential Signaling
HDMI ± High Definition Multimedia Interface
Figure 23. Typical System Diagram
8.2.1 Design Requirements
The SER/DES supports only AC-coupled interconnects through an integrated DC-balanced decoding scheme.
External AC-coupling capacitors must be placed in series in the FPD-Link III signal path as shown in Figure 24.
Table 11. Design Parameters
DESIGN PARAMETER
EXAMPLE VALUE
VDDIO
1.8 V
AC-Coupling Capacitor for DOUT0± and DOUT1± with 92x
deserializers
100 nF
AC-Coupling Capacitor for DOUT0± and DOUT1± with 94x
deserializers
33 nF
For applications using single-ended 50-Ω coaxial cable, the unused data pins (DOUT-) should use a 15-nF
capacitor and should be terminated with a 50-Ω resistor.
DOUT+
RIN+
DOUT-
RIN-
SER
DES
Figure 24. AC-Coupled Connection (STP)
DOUT+
RIN+
SER
DES
DOUT-
50Q
50Q
RIN-
Figure 25. AC-Coupled Connection (Coaxial)
For high-speed FPD–Link III transmissions, the smallest available package should be used for the AC-coupling
capacitor. This will help minimize degradation of signal quality due to package parasitics.
8.2.2 Detailed Design Procedure
8.2.2.1 High-Speed Interconnect Guidelines
See LVDS SerDes Gen I PCB and Interconnect Design-In Guidelines (SNLA008) and Transmission Line
RAPIDESIGNER Operation and Applications Guide (SNLA035) for full details.
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•
•
•
•
•
•
•
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Use 100-Ω coupled differential pairs
Use the S/2S/3S rule in spacings
– S = space between the pair
– 2S = space between pairs
– 3S = space to LVCMOS signal
Minimize the number of Vias
Use differential connectors when operating above 500-Mbps line speed
Maintain balance of the traces
Minimize skew within the pair
Terminate as close to the TX outputs and RX inputs as possible
Additional general guidance can be found in the LVDS Owner’s Manual - available in PDF format from the Texas
Instruments web site at: LVDS Owner's Manual (SNLA187).
8.2.3 Application Curves
8.2.3.1 Application Performance Plots
Figure 26 corresponds to 720p60 video application with single lane FPD-Link III output. Figure 27 corresponds to
3.36-Gbps single-lane output from 96-MHz input TMDS clock.
Figure 26. 720p60 Video at 2.6-Gbps Serial Line Rate,
Single Lane FPD-Link III output
62
Figure 27. Serializer Output at 3.36-Gbps (96-MHz TMDS
Clock)
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9 Power Supply Recommendations
This device provides separate power and ground pins for different portions of the circuit. This is done to isolate
switching noise effects between different sections of the circuit. Separate planes on the PCB are typically not
required. The Pin Functions table in the Pin Configuration and Functions section provides guidance on which
circuit blocks are connected to which power pins. In some cases, an external filter many be used to provide clean
power to sensitive circuits such as PLLs.
9.1 Power-Up Requirements and PDB Pin
The power supply ramp should be faster than 1.5 ms with a monotonic rise. A large capacitor on the PDB pin
may be used to ensure PDB arrives after all the supply pins have settled to the recommended operating voltage.
When PDB pin is pulled up to VDDIO, a 10-kΩ pullup and a >10-μF capacitor to GND are required to delay the
PDB input signal rise. All inputs must not be driven until all power supplies have reached steady state.
The recommended power up sequence is as follows:
• VDD18
• VTERM
• VDD11
• Wait until all supplies have settled
• Activate PDB
• Apply HDMI input
There will be no functional impact to using a different sequence than shown below, but the current draw on
VTERM during power up may be higher in other cases.
The initialization sequence A shown in Figure 29 consists of any user-defined device configurations and the
following:
1. Set Register 0x5B bit 5 to 0. This disables the FPD3 PLL from resetting when a frequency change is
detected.
2. Set Register 0x16 to 0x02. This minimizes the duration of inadvertent I2C events.
3. Set Register 0x04 bit 4 to 1. This prevents video from being sent during the blanking interval.
The initialization sequence B shown in Figure 29 should be performed after the TMDS clock has stabilized.
Sequence B consists of the following:
1. Reset the HDMI PLL by writing the following registers:
– Register 0x40 = 0x10
– Register 0x41 = 0x49
– Register 0x42 = 0x10
– Register 0x42 = 0x00
2. Reset the FPD PLL by writing the following registers:
– Register 0x40 = 0x14
– Register 0x41 = 0x49
– Register 0x42 = 0x10
– Register 0x42 = 0x00
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Power-Up Requirements and PDB Pin (continued)
tr0
VTERM
GND
tr0
VDDIO
VDD18
GND
tr1
t0
VDD11
GND
t1
(*)
PDB
t2
VDDIO
VPDB_HIGH
VPDB_LOW
GND
t4
t3
t3
t5
GPIO
(*)
TI recommends that the designer assert PDB (active High) with a microcontroller rather than an RC filter network to
help ensure proper sequencing of PDB pin after settling of power supplies.
Figure 28. Recommended Power Sequencing
64
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Power-Up Requirements and PDB Pin (continued)
VDDx
t2
PDB
t3
HDMI
TMDS clock
+/-0.5% variation
...
...
t6
Init A
Init B
I2C Local
DOUT0/1
Valid Data
Figure 29. Initialization Sequencing
Table 12. Power-Up Sequencing Constraints
SYMBOL
DESCRIPTION
VDD18, VDDIO
VDD18 / VDDIO voltage
range
TEST CONDITIONS
MIN
TYP
MAX
UNIT
1.71
1.89
V
VTERM
VTERM voltage range
DC-coupled HDMI termination
3.135
3.465
V
AC-coupled HDMI termination
1.71
1.89
VDD11
VDD11 voltage range
V
1.045
1.155
V
VPDB_LOW
PDB LOW threshold
Note: VPDB should not exceed
limit for respective I/O voltage
before 90% voltage of VDD12
VDDIO = 1.8V ± 5%
VPDB_HIGH
PDB HIGH threshold
VDDIO = 1.8V ± 5%
0.65 *
VDDIO
V
tr0
VTERM / VDDIO / VDD18 rise
time
These time constants are specified for
rise time of power supply voltage ramp
(10% -90%).
1.5
ms
tr1
VDD11 rise time
These time constants are specified for
rise time of power supply voltage ramp
(10% -90%).
1.5
ms
t0
VDDIO / VDD18 delay time
VTERM needs to ramp-up before VDD18
and VDDIO.
0
ms
t1
VDD11 delay time
VDDIO and VDD18 need to ramp-up
before VDD11.
0
ms
t2
PDB delay time
PDB should be released after all supplies
are stable.
0
ms
t3
I2C ready time
Starting from PDB high, the local I2C
access is available after this time.
2
ms
t4
Hard reset time
PDB negative pulse width required for the
device reset.
2
ms
0.35 *
VDDIO
V
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Power-Up Requirements and PDB Pin (continued)
Table 12. Power-Up Sequencing Constraints (continued)
SYMBOL
66
DESCRIPTION
TEST CONDITIONS
MIN
t5
PDB to HDMI delay time
Keep GPIOs low or high until after PDB
release.
0
ms
t6
TMDS Clock Stable to PLL
Reset (Init B)
TMDS Clock must be within 0.5% of the
target frequency and stable.
1
µs
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MAX
UNIT
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10 Layout
10.1 Layout Guidelines
Circuit board layout and stack-up for the LVDS serializer and deserializer devices should be designed to provide
low-noise power to the device. Good layout practice will also separate high frequency or high-level inputs and
outputs to minimize unwanted stray noise, feedback and interference. Power system performance may be greatly
improved by using thin dielectrics (2 to 4 mil) for power / ground sandwiches. This arrangement uses the plane
capacitance for the PCB power system and has low-inductance, which has proven effectiveness especially at
high frequencies, and makes the value and placement of external bypass capacitors less critical. External bypass
capacitors should include both RF ceramic and tantalum electrolytic types. RF capacitors may use values in the
range of 0.01-μF to 10-μF. Tantalum capacitors may be in the 2.2-μF to 10-μF range. The voltage rating of the
tantalum capacitors should be at least 5X the power supply voltage being used.
MLCC surface mount capacitors are recommended due to their smaller parasitic properties. When using multiple
capacitors per supply pin, place the smaller value closer to the pin. A large bulk capacitor is recommended at the
point of power entry. This is typically in the 50-μF to 100-μF range and will smooth low frequency switching noise.
TI recommends to connect power and ground pins directly to the power and ground planes with bypass
capacitors connected to the plane with via on both ends of the capacitor. Connecting power or ground pins to an
external bypass capacitor will increase the inductance of the path. A small body size X7R chip capacitor, such as
0603 or 0805, is recommended for external bypass. A small body sized capacitor has less inductance. The user
must pay attention to the resonance frequency of these external bypass capacitors, usually in the range of 20
MHz to 30 MHz. To provide effective bypassing, multiple capacitors are often used to achieve low impedance
between the supply rails over the frequency of interest. At high frequency, it is also a common practice to use
two vias from power and ground pins to the planes, reducing the impedance at high frequency.
Some devices provide separate power and ground pins for different portions of the circuit. This is done to isolate
switching noise effects between different sections of the circuit. Separate planes on the PCB are typically not
required. Pin Description tables typically provide guidance on which circuit blocks are connected to which power
pin pairs. In some cases, an external filter many be used to provide clean power to sensitive circuits such as
PLLs. For DS90UB929-Q1, only one common ground plane is required to connect all device related ground pins.
Use at least a four-layer board with a power and ground plane. Place LVCMOS signals away from the LVDS
lines to prevent coupling from the LVCMOS lines to the LVDS lines. Closely coupled differential lines of 100 Ω
are typically recommended for LVDS interconnect. The closely coupled lines help to ensure that coupled noise
will appear as common mode and thus is rejected by the receivers. The tightly coupled lines will also radiate
less.
At least 9 thermal vias are necessary from the device center DAP to the ground plane. They connect the device
ground to the PCB ground plane, as well as conduct heat from the exposed pad of the package to the PCB
ground plane. More information on the LLP style package, including PCB design and manufacturing
requirements, is provided in TI Application Note: AN-1187 (SNOA401).
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10.2 Layout Example
Figure 30 is derived from a layout design of the DS90UB929-Q1. This graphic is used to demonstrate proper
high-speed routing when designing in the Serializer.
Figure 30. DS90UB929-Q1 Serializer Layout Example
68
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11 Device and Documentation Support
11.1 Documentation Support
11.1.1 Related Documentation
For related documentation see the following:
• Absolute Maximum Ratings For Soldering (SNOA549)
• Semiconductor and IC Package Thermal Metrics (SPRA953)
• Channel-Link PCB and Interconnect Design-In Guidelines (SNLA008)
• Transmission Line RAPIDESIGNER Operation and Application Guide (SNLA035)
• Leadless Leadframe Package (LLP) Application Report (SNOA401)
• LVDS Owner's Manual (SNLA187)
• I2C Communication Over FPD-Link III With Bidirectional Control Channel (SNLA131)
• Using The I2s Audio Interface of DS90Ux92x FPD-Link III Devices (SNLA221)
• Exploring The Internal Test Pattern Generation Feature of 720p FPD-Link III Devices (SNLA132)
11.2 Receiving Notification of Documentation Updates
To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper
right corner, click on Alert me to register and receive a weekly digest of any product information that has
changed. For change details, review the revision history included in any revised document.
11.3 Trademarks
TRI-STATE is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
11.4 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
11.5 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
12 Mechanical, Packaging and Orderable Information
The following pages include mechanical packaging and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
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PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
Lead/Ball Finish
MSL Peak Temp
(2)
(6)
(3)
Op Temp (°C)
Device Marking
(4/5)
DS90UB929TRGCRQ1
ACTIVE
VQFN
RGC
64
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-3-260C-168 HR
-40 to 105
UB929Q
DS90UB929TRGCTQ1
ACTIVE
VQFN
RGC
64
250
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-3-260C-168 HR
-40 to 105
UB929Q
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based
flame retardants must also meet the <=1000ppm threshold requirement.
(3)
MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4)
There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5)
Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6)
Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 1
Samples
PACKAGE OPTION ADDENDUM
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Addendum-Page 2
PACKAGE MATERIALS INFORMATION
www.ti.com
17-Nov-2019
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
Diameter Width (mm)
(mm) W1 (mm)
B0
(mm)
K0
(mm)
P1
(mm)
W
Pin1
(mm) Quadrant
DS90UB929TRGCRQ1
VQFN
RGC
64
2000
330.0
16.4
9.3
9.3
1.1
12.0
16.0
Q2
DS90UB929TRGCTQ1
VQFN
RGC
64
250
180.0
16.4
9.3
9.3
1.1
12.0
16.0
Q2
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
17-Nov-2019
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
DS90UB929TRGCRQ1
VQFN
RGC
64
2000
367.0
367.0
38.0
DS90UB929TRGCTQ1
VQFN
RGC
64
250
210.0
185.0
35.0
Pack Materials-Page 2
GENERIC PACKAGE VIEW
RGC 64
VQFN - 1 mm max height
PLASTIC QUAD FLATPACK - NO LEAD
9 x 9, 0.5 mm pitch
Images above are just a representation of the package family, actual package may vary.
Refer to the product data sheet for package details.
4224597/A
www.ti.com
PACKAGE OUTLINE
VQFN - 1 mm max height
RGC0064K
PLASTIC QUAD FLAT PACK- NO LEAD
A
9.1
8.9
B
9.1
8.9
PIN 1 INDEX AREA
1.00
0.80
C
0.05
0.00
SEATING PLANE
0.08 C
7.5
5.75±0.1
60X 0.5
16
33
SYMM
65
7.5
PIN 1 ID
(OPTIONAL)
(0.2) TYP
32
17
1
48
64
SYMM
49
64X 0.5
0.3
64X 0.30
0.18
0.1
0.05
C A B
C
4224668/A 11/2018
NOTES:
1.
2.
3.
All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing
per ASME Y14.5M.
This drawing is subject to change without notice.
The package thermal pad must be soldered to the printed circuit board for optimal thermal and mechanical performance.
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EXAMPLE BOARD LAYOUT
VQFN - 1 mm max height
RGC0064K
PLASTIC QUAD FLAT PACK- NO LEAD
2X (8.8)
2X (7.5)
( 5.75)
64X (0.6)
49
64
64X (0.24)
1
48
60X (0.5)
SYMM
2X
(1.36)
65
(Ø0.2) VIA
TYP
(R0.05)
TYP
2X
2X
(7.5) (8.8)
2X
(1.265)
16
33
32
17
2X (1.36)
2X (1.265)
SYMM
LAND PATTERN EXAMPLE
EXPOSED METAL SHOWN
SCALE: 8X
0.07 MAX
ALL AROUND
0.07 MIN
ALL AROUND
EXPOSED METAL
SOLDER MASK
OPENING
EXPOSED METAL
METAL
NON SOLDER MASK
DEFINED
(PREFERRED)
SOLDER MASK
OPENING
SOLDER MASK
DEFINED
SOLDER MASK DETAILS
METAL UNDER
SOLDER MASK
4224668/A 11/2018
NOTES: (continued)
4.
5.
This package is designed to be soldered to a thermal pad on the board. For more information, see Texas Instruments literature
number SLUA271 (www.ti.com/lit/slua271) .
Vias are optional depending on application, refer to device data sheet. If any vias are implemented, refer to their locations shown
on this view. It is recommended that vias under paste be filled, plugged or tented.
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EXAMPLE STENCIL DESIGN
VQFN - 1 mm max height
RGC0064K
PLASTIC QUAD FLAT PACK- NO LEAD
2X (8.8)
2X (7.5)
16X (
64X (0.6)
1.16)
49
64
64X (0.24)
1
48
60X (0.5)
65
2X
(0.68)
SYMM
2X
2X
(7.5) (8.8)
METAL
TYP
(R0.05)
TYP
2X
(1.36)
16
33
32
17
2X (0.68)
SYMM
2X (1.36)
SOLDER PASTE EXAMPLE
BASED ON 0.125 mm THICK STENCIL
EXPOSED PAD
65% PRINTED COVERAGE BY AREA
SCALE: 8X
4224668/A 11/2018
NOTES: (continued)
6.
Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate
design recommendations.
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IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD
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These resources are intended for skilled developers designing with TI products. You are solely responsible for (1) selecting the appropriate
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Copyright © 2019, Texas Instruments Incorporated
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