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Texas Instruments TVP5154A VBI Quick Start Application notes
Application Report
SLEA104 – July 2010
TVP5154A VBI Quick Start
.....................................................................................................................................................
ABSTRACT
The TVP5154A video decoder has an internal vertical data processor (VDP) that can be used to slice
various VBI data services such as V-Chip, Teletext (WST, NABTS), closed captioning (CC), wide screen
signaling (WSS), copy generation management system (CGMS), video program system (VPS), electronic
program guide (EPG or Gemstar), program delivery control (PDC) and vertical interval time code (VITC).
This application report provides an introduction to the VBI data slicing capabilities of the TVP5154A and
focuses on configuring the TVP5154A for the more commonly used VBI data services.
Contents
1
Introduction .................................................................................................................. 2
2
VDP Configuration RAM ................................................................................................... 4
3
Line Mode Registers ........................................................................................................ 5
4
Sliced Data Retrieval ....................................................................................................... 7
5
Managing Data Retrieval ................................................................................................... 7
6
FIFO Access ................................................................................................................. 8
7
Ancillary Data ................................................................................................................ 9
8
Full-Field Mode ............................................................................................................ 10
9
VBI Raw Data Mode ...................................................................................................... 10
Appendix A
Subset of the TVP5154A VDP I2C Registers ................................................................. 12
Appendix B
Sample WinVCC CMD File for VBI Setup ..................................................................... 20
Appendix C Example TVP5154A C Code .................................................................................... 21
Appendix D VBI Raw Data I2C Registers .................................................................................... 22
List of Figures
.......................................
1
The VDP Configuration RAM is Loaded Prior to Line Mode Register Setup
2
Example Load of WSS/CGMS Configuration RAM ..................................................................... 5
3
3
Line Mode Setup for WSS/CGMS ........................................................................................ 6
4
Example WSS/CGMS Data Retrieval .................................................................................... 7
5
Line 21 Closed Caption ITU-R BT.656 Digital Output Capture with YUV Samples Present Raw Data
Mode disabled ............................................................................................................. 11
6
Line 21 Closed Caption ITU-R BT.656 Digital Output Capture in Raw Data ModeUV (chroma) data are
replaced with Y (luma) data .............................................................................................. 11
List of Tables
..................................................................................................
1
Supported Data Services
2
Configuration RAM Recommended Settings ............................................................................ 4
3
Line Mode Configuration Bits for Supported Modes.................................................................... 6
4
Dedicated VDP Data Registers ........................................................................................... 7
5
Ancillary Data Header ...................................................................................................... 9
6
525-Line Raw Data Setup to Include Line 21 .......................................................................... 10
7
625-Line Raw Data Setup ................................................................................................ 10
SLEA104 – July 2010
TVP5154A VBI Quick Start
Copyright © 2010, Texas Instruments Incorporated
2
1
Introduction
1
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Introduction
The TVP5154A video decoder has an internal Vertical Data Processor (VDP) that can be used to slice
various VBI data services such as V-Chip, Teletext (WST, NABTS), Closed Captioning (CC), Wide Screen
Signaling (WSS), Copy Generation Management System (CGMS), Video Program System (VPS),
Electronic Program Guide (EPG or Gemstar), Program Delivery Control (PDC), and Vertical Interval Time
Code (VITC). These data services are typically transmitted during the vertical blanking interval of the video
frame. Table 1 provides a summary of the supported data services including the line numbers on which
they are typically transmitted.
Table 1. Supported Data Services
VBI System
Standard
Line Number
Number of Bytes
Specification
Teletext WST A
SECAM
6-23 (field 1, 2)
38
ITU-R BT 653-3
Teletext WST B
PAL
6-22 (field 1, 2)
43
ITU-R BT 653-3
Teletext NABTS C
NTSC-M
10-21 (field 1, 2)
34
ITU-R BT 653-3
Teletext NABTS D
NTSC-J
10-21 (field 1, 2)
35
ITU-R BT 653-3
Closed Caption
PAL
22 (field 1, 2)
2
EIA-608-D
Closed Caption
NTSC
21 (field 1, 2)
2
EIA-608-D
WSS/CGMS
PAL
23 (field 1, 2)
14 bits
ITU-R BT 1119-1
WSS/CGMS
NTSC
20 (field 1, 2)
20 bits
IEC 61880
VITC
PAL
6-22
9
SMPTE 12M-1999
VITC
NTSC
10-20
9
SMPTE 12M-1999
VPS (PDC)
PAL
16
13
ETS 300 231
21 (field 2)
2
EIA-744-A
V-Chip
NTSC
Gemstar 1x
NTSC
2
Gemstar 2x
NTSC
5 with frame byte
User
Any
Programmable
Programmable
A host or backend receiver can retrieve the sliced data using one of three methods:
• I2C access of dedicated Closed Caption, WSS, CGMS, VPS, Gemstar, VITC, and V-Chip data
registers.
• I2C access of an internal 512-byte FIFO used primarily for high-bandwidth data services such as
full-field teletext.
• As ITU-R BT.656 ancillary data, inserted by the TVP5154A in the data stream during the horizontal
blanking interval.
Note: This document will focus primarily on the more commonly used dedicated I2C data registers.
Prior to accessing the VBI sliced data, the TVP5154A must be configured for the desired VBI data service.
This includes loading of the VDP Configuration RAM (C-RAM) and the Line Mode registers that are used
to enable various data services. Detailed descriptions of the VBI related I2C registers are shown in
Appendix A.
2
TVP5154A VBI Quick Start
SLEA104 – July 2010
Copyright © 2010, Texas Instruments Incorporated
Introduction
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Figure 1. The VDP Configuration RAM is Loaded Prior to Line Mode Register Setup
SLEA104 – July 2010
TVP5154A VBI Quick Start
Copyright © 2010, Texas Instruments Incorporated
3
VDP Configuration RAM
2
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VDP Configuration RAM
The first step in configuring the TVP5154A for VBI data slicing is to load the VDP Configuration RAM
(C-RAM). The C-RAM defines the data slicing modes for the various data services, with each mode
having its own unique RAM address and 16 byte block of memory. Table 2 shows the recommended
setup values for the various data services that are supported. Prior to loading the C-RAM, the Line Mode
registers must all be programmed with a value of FFh to avoid conflict between the VDP and
microprocessor during the load process. Full field mode must also be disabled in I2C register CFh.
Table 2. Configuration RAM Recommended Settings
Index
Address
Reserved
000h
WST SECAM
010h
Reserved
020h
WST PAL B
030h
Reserved
040h
WST PAL C
050h
Reserved
060h
WST NTSC
070h
Reserved
080h
NABTS, NTSC
090h
Reserved
0A0h
NABTS, NTSC-J
0B0h
Reserved
0C0h
CC, PAL/SECAM
0D0h
Reserved
0E0h
CC, NTSC
0F0h
Reserved
100h
WSS/CGMS, PAL/SECAM
110h
Reserved
120h
WSS/CGMS, NTSC
130h
Reserved
140h
VITC, PAL/SECAM
150h
Reserved
160h
VITC, NTSC
170h
Reserved
180h
VPS, PAL
190h
Reserved
1A0h
Gemstar Custom 1
1B0h
0
1
2
3
4
5
6
7
AA
AA
FF
FF
E7
2E
20
8
9
A
B
C
D
E
F
B4
OE
0
7
0
10
0
72
10
0
7
0
10
0
98
0D
0
0
0
10
0
93
0D
0
0
0
10
0
93
0D
0
7
0
15
0
93
0D
0
7
0
10
0
7B
09
0
0
0
27
0
8C
09
0
0
0
27
0
CD
0F
0
0
0
3A
0
7C
08
0
0
0
39
0
85
08
0
0
0
4C
0
94
08
0
0
0
4C
0
DA
0B
0
7
0
60
0
13
80
0
0
60
0
Reserved
A6
E4
Reserved
AA
AA
FF
FF
27
2E
20
AB
A4
Reserved
AA
AA
FF
FF
E7
2E
20
22
A4
Reserved
AA
AA
FF
FF
27
2E
20
23
63
Reserved
AA
AA
FF
FF
E7
2E
20
AA
AA
FF
FF
A7
2E
20
A2
63
Reserved
A3
63
Reserved
AA
2A
FF
3F
04
51
6E
02
A4
Reserved
AA
2A
FF
3F
04
51
6E
02
63
Reserved
5B
55
C5
FF
0
71
6E
42
A4
Reserved
38
0
3F
0
0
71
6E
0
0
0
0
0
8F
6D
43
63
Reserved
49
A4
Reserved
0
0
0
0
0
8F
6D
49
63
Reserved
AA
AA
FF
FF
BA
CE
2B
8D
A4
Programmable
99
99
FF
FF
05
51
6E
05
63
18
The C-RAM is accessed through the use of three I2C registers (C3h-C5h). Registers C4h and C5h must
be programmed with the 9-bit starting address of the block of C-RAM to be programmed. I2C read and
write operations are then performed indirectly using register C3h. The C-RAM address is automatically
incremented following each I2C transaction. Only the portion of the C-RAM that includes the data service
to be used needs to be programmed. If WSS/CGMS for NTSC is the only desired data service, for
example, only the 16 bytes starting at C-RAM address 130h need to be programmed. Figure 2 shows
example C code for loading the WSS/CGMS C-RAM.
4
TVP5154A VBI Quick Start
SLEA104 – July 2010
Copyright © 2010, Texas Instruments Incorporated
Line Mode Registers
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Configuration RAM I2C Access Registers
Address
C3h-C5h
Address
C3h
C4h
C5h
7
6
5
4
3
Configuration data
RAM address [7:0]
Reserved
2
1
0
RAM
address 8
Example: (Write 2 data bytes starting at C-RAM address 130h).
1. Set C-RAM starting address.
(a) Write 30h to register C4h (C-RAM address [7:0]).
(b) Write 01h to register C5h (C-RAM address [8]).
2. Write the two bytes (38h and 00h)
(a) Write 38h to register C3h. Write first byte to C-RAM address 130h.
(b) Write 00h to register C3h. Write next byte to C-RAM address 131h.
// TVP5154A NTSC WSS/CGMS C-RAM Load Example
#define TVP5154A 0xB8;
byte I2C_Data;
int CRAM_Address, count;
// TVP5154A main I2C address
byte I2CData ={0x14,0x02};
// recommended WSS/CGMS settings
byte WSS_ARRAY[]={0x38,0,0x3F,0,0,0x71,0x6E,0x43,0x63,0x7C,0x08,0,0,0,0x39,0};
I2C_RegAddress = 0xD0;
// starting address of Line Mode registers
I2C_Data = 0xFF;
For (count = 0; count < 44; count ++)
{
I2CWriteByte(TVP5154A, I2C_RegAddress, I2C_Data); //write FFh to Line Mode registers
I2C_RegAddress ++;
}
I2CWriteByte(TVP5154A, 0xCF, 0);
// disable full field mode
CRAM_Address = 0x130;
// address of NTSC WSS/CGMS C-RAM block
I2CWriteByte(TVP5154A, 0xC4, 0x30);
// load C4h with C-RAM address[7:0]
I2CWriteByte(TVP5154A, 0xC5, 0x01);
// load C5h with C-RAM address[8]
For (count = 0; count < 16; count++)
{
I2CWriteByte(TVP5154A, 0xC3, WSS_ARRAY[count]);
}
// write 16 bytes of WSS/CGMS C-RAM
// data to register C3h.
Figure 2. Example Load of WSS/CGMS Configuration RAM
3
Line Mode Registers
After the VDP Configuration RAM is loaded, the Line Mode Registers (D0h-FBh) must be properly
configured for the desired VBI data service. Each register in this register bank is linked to a specific video
line number and video field. Video lines 6 through 27 of both Field 1 and Field 2 are supported. For each
desired data service, the proper mode configuration bits need to be loaded into the line mode register that
is linked to the correct video line number. Additional data slicing options such as filtering, error correction,
and FIFO routing are also available in the line mode registers. Unused line mode and line address
registers must be programmed with FFh. A detailed description of these registers is shown in Appendix A.
The TVP5154A VDP is based on an NTSC line numbering convention, resulting in a 3-line VDP offset
SLEA104 – July 2010
TVP5154A VBI Quick Start
Copyright © 2010, Texas Instruments Incorporated
5
Line Mode Registers
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relative to actual PAL line numbers. For PAL systems, the Line Mode register for line “N+3” must be used
to configure a data service transmitted on line N of the input source. Figure 3 shows example C code for
configuring WSS/CGMS data services for NTSC and PAL. Included in this example is an I2C write to the
Pixel Alignment Registers (CBh-CCh), which define the horizontal position where data slicing begins. The
value used (4Eh) is recommended for all data services.
Table 3. Line Mode Configuration Bits for Supported Modes
Line Mode Register
(D0h-FCh) Bits [3:0]
Name
Video Line Number
0000b
WST SECAM
6-23 (field 1, 2)
Teletext, SECAM
0001b
WST PAL B
6-22 (field 1, 2)
Teletext, PAL, System B
0010b
WST PAL C
6-22 (field 1, 2)
Teletext, PAL, System C
0011b
WST, NTSC B
10-21 (field 1, 2)
Teletext, NTSC, System B
0100b
NABTS, NTSC C
10-21 (field 1, 2)
Teletext, NTSC, System C
0101b
NABTS, NTSC D
10-21 (field 1, 2)
Teletext, NTSC, System D (Japan)
0110b
CC, PAL/SECAM
22 (field 1, 2)
Closed caption PAL/SECAM
0111b
CC, NTSC
21 (field 1, 2)
Closed caption NTSC
1000b
WSS/CGMS, PAL/SECAM
23 (field 1, 2)
Wide-screen signal, PAL/SECAM
1001b
WSS/CGMS, NTSC
20 (field 1, 2)
Wide-screen signal, NTSC
1010b
VITC, PAL/SECAM
6-22
Vertical interval timecode, PAL/SECAM
1011b
VITC, NTSC
10-20
Vertical interval timecode, NTSC
1100b
VPS, PAL
16
1101b
EPG/Gemstar
1110b
x
x
1111b
Active Video
Active Video
Description
Video program system, PAL
Electronic program guide - Custom mode
Reserved
Active video/full field
// Example C Code for setting up WSS/CGMS Line Mode Registers
//
// Load C-RAM
//
// NTSC WSS/CGMS Line Mode setup for line 20 of both fields
I2CWriteByte(TVP5154A, 0xEC, 0x09);
I2CWriteByte(TVP5154A, 0xED, 0x09);
// line 20 field 1 (0xEC), mode bits = 0x09
// line 20 field 2 (0xED), mode bits = 0x09
I2CWriteByte(TVP5154A, 0xCB, 0x4E);
I2CWriteByte(TVP5154A, 0xCC, 0x00);
// Set Pixel Alignment [7:0]to 0x4E
// Set Pixel Alignment [9:8]to 0x00
// PAL WSS/CGMS Line Mode setup for line 23 (source input) of both fields.
// PAL line numbering has 3 line offset so the Line 26 line mode registers are used.
I2CWriteByte(TVP5154A, 0xF8, 0x08);
I2CWriteByte(TVP5154A, 0xF9, 0x08);
// line 26 field 1 (0xF8), mode bits = 0x08
// line 26 field 2 (0xF9), mode bits = 0x08
I2CWriteByte(TVP5154A, 0xCB, 0x4E);
I2CWriteByte(TVP5154A, 0xCC, 0x00);
// Set Pixel Alignment [7:0]to 0x4E
// Set Pixel Alignment [9:8]to 0x00
Figure 3. Line Mode Setup for WSS/CGMS
6
TVP5154A VBI Quick Start
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Copyright © 2010, Texas Instruments Incorporated
Sliced Data Retrieval
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4
Sliced Data Retrieval
The TVP5154A provides dedicated I2C registers (see Table 4) for the retrieval of sliced data. Due to
higher bandwidth requirements, teletext data is stored in a 512-byte FIFO. With all other data services,
sliced data can be automatically sent to the dedicated registers or to the FIFO depending on the line mode
setup. The WSS/CGMS example in Figure 3 results in WSS/CGMS data being routed to the dedicated
WSS/CGMS data registers.
Table 4. Dedicated VDP Data Registers
I2C Address
Register Name
VDP Closed Caption Data (field 1)
90h - 91h
VDP Closed Caption Data (field 2)
92h - 93h
VDP WSS/CGMS Data (field 1)
94h - 96h
VDP WSS/CGMS Data (field 2)
97h - 99h
VDP VPS (PAL) /Gemstar 2x (NTSC)
Data
9Ah - A6h
VDP VITC Data
A7h - AFh
The internal 512-byte FIFO is used primarily for high-bandwidth teletext acquisition but can also be used
for capture of the other data services if enable in the Line Mode register. A header containing information
about the sliced data precedes all sliced data that is routed to the FIFO. The FIFO can be directly
accessed by the host at I2C address B0h. Bit 0 of the FIFO output control register (CDh) must be set to a
logic1 to enable host access to the FIFO.
5
Managing Data Retrieval
The VDP Status Registers (C6h) can be used to determine if sliced data is available. Unmasked data
available bits for the supported data services are available in this register.
VDP Status Register
Address
7
FIFO full error
C6h
6
FIFO empty
5
TTX available
4
CC field 1
available
3
CC field 2
available
2
WSS/CGMS
available
1
VPS/Gemstar
2x available
0
VITC available
A logic 1 indicates that sliced data is available. Once set, these bits need to be cleared after data retrieval. Writing a 1 to the appropriate
bit(s) in this register clears the status bit. Figure 4 shows an example WSS/CGMS data retrieval.
// Example C Code for WSS/CGMS NTSC Sliced Data Read
// Load C-RAM
// Configure Line Mode Registers
byte Status;
byte WSSData[3];
I2CReadBuffer(TVP5154A,0xC6,&Status,1);
//read 1 byte(status)from register C6h
if ((Status & 0x20) == 1)
{
I2CReadBuffer(TVP5154A,0x94,&WSSData[0],3);
I2CWriteByte(TVP5154A,0xC6,0x20);
//
//
//
//
if WSS/CGMS bit set,
read the 3 WSS/CGMS bytes
at WSS/CGMS data registers 94h–96h.
clear WSS/CGMS available status bit
}
Figure 4. Example WSS/CGMS Data Retrieval
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TVP5154A VBI Quick Start
Copyright © 2010, Texas Instruments Incorporated
7
FIFO Access
6
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FIFO Access
The internal 512-byte FIFO is used primarily for high-bandwidth teletext acquisition but can also be used
for capture of the other data services. The FIFO can be directly accessed by the host at I2C address B0h.
Bit 0 of the VDP FIFO output control register (CDh) must be set to logic 1 to enable host access to the
FIFO. A header containing information about the sliced data precedes all sliced data that is routed to the
FIFO. A VDP FIFO Interrupt threshold register (C8h), FIFO word count register (C7h), and FIFO full/empty
status bits (C6h) are available for managing FIFO data flow.
8
TVP5154A VBI Quick Start
SLEA104 – July 2010
Copyright © 2010, Texas Instruments Incorporated
Ancillary Data
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7
Ancillary Data
An option is available to enable transmission of sliced VBI data as ancillary data in the ITU-R BT.656
video data stream. In this mode, the sliced data is inserted on the Y[7:0] output terminals during the
horizontal blanking interval. An 8-byte header containing information about the sliced data is also inserted
in the data stream prior to the sliced data. The header includes a 00h, FFh, FFh preamble that identifies
the data as VBI ancillary data, so the host or backend must be able to distinguish between this preamble
and the ITU-R BT.656 embedded sync codes (FFh, 00h, 00h, E/SAV). The first header byte is inserted
immediately following the EAV code during the horizontal blanking interval of the digital line where it
occurred. The ancillary data header is summarized in Table 5.
The ancillary data mode is enabled by setting bit 6 in the appropriate line-mode register to a logic 1 and
the host-access enable bit (bit 0) in register CDh to a logic 0. When the ancillary data mode is enabled in
register CDh, sliced data is not routed to the internal 512-byte FIFO.
Table 5. Ancillary Data Header
Byte No.
D7 (MSB)
D6
D5
D4
D3
D2
D1
D0 (LSB)
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
3
NEP
EP
0
1
0
DID2
DID1
DID0
4
NEP
EP
F5
F4
F3
F2
F1
F0
Secondary data ID (SDID)
5
NEP
EP
N5
N4
N3
N2
N1
N0
Number of 32 bit data (NN)
6
7
Video line # [7:0]
0
0
0
Data error
Match #1
Description
Ancillary data preamble
Data ID (DID)
Internal Data ID0 (IDID0)
Match #2
Video line # [9:8]
Internal Data ID1 (IDID1)
8
1. Data
Data byte
9
2. Data
Data byte
10
3. Data
Data byte
11
4. Data
Data byte
...
...
...
m-1. Data
Data byte
m. data
Data byte
CS [7:0]
4N+7
0
0
0
0
1st word
Nth word
Checksum
0
0
0
0
Fill byte
EP:
NEP:
DID:
Even parity for D0-D5
Negate even parity
91h:
Sliced data from the vertical blanking interval of first field
53h:
Sliced data from outside of the vertical blanking interval of first field
55h:
Sliced data from the vertical blanking interval of second field
97h:
Sliced data from outside of the vertical blanking interval of second field
SDID:
This field holds the data format taken from the line-mode register of the corresponding line.
NN:
Number of Dwords beginning with byte 8 through 4N+7. Note that each Dword is 4 bytes.
IDID0:
Transaction video line number [7:0]
IDID1:
Bit
Transaction video line number [9:8].
0/1:
Bit 2: Match 2 flag.
Bit 3: Match 1 flag.
Bit 4: Value = 1 if a single error was detected in the EDC block. Value = 0 if no error was detected.
CS:
Sum of D0-D7 of 1.Data through last data byte.
Fill byte:
Fill byte makes a multiple of 4 bytes from byte zero to last fill byte.
Note: The number of bytes (m) varies depending on the VBI data service.
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TVP5154A VBI Quick Start
Copyright © 2010, Texas Instruments Incorporated
9
Full-Field Mode
8
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Full-Field Mode
Some teletext services transmit data on multiple video lines occurring anywhere in the video field. The
TVP5154A provides a full-field mode which arms VDP slicing for all lines in the video field. When full-field
mode is enabled, all video lines excluding those defined in the line-mode registers are sliced as specified
in the VDP full-field mode register (FCh). The full-field mode register uses the same mode configuration
format as the line-mode registers. Full-field mode is enabled by setting the full-field enable bit in register
CFh to a logic 1. Sliced data is then retrieved by I2C FIFO access or as ancillary data in the ITU-R BT.656
data stream.
9
VBI Raw Data Mode
The TVP5154A offers a VBI raw data mode for use in systems where VBI data slicing and processing is
handled in the digital backend receiver instead of the video decoder. In this mode of operation, the
decoders are configured to output raw 2x over-sampled luma data on the ITU-R BT.656 output during the
defined VBLK (vertical blanking) interval. The raw, un-sliced A/D video data is transmitted during the
active video portion of the line with chroma samples being replaced with the luma samples.
The default VBLK interval for Field 1 is defined as lines 1 through 20 for 525-line video formats and lines
623 through 23 for 625-line video formats. This interval may be adjusted to include additional lines.
Support for NTSC line 21 closed caption data, for example, requires extension of the VBLK interval to
include line 21.
The default VBLK interval for the TVP5154A is defined as lines 1 through 20 for 525-line video formats
and lines 623 through 23 for 625-line formats. The TVP5154A VBLK interval can be adjusted with the
VBLK Start and Stop registers (18h-19h). The TVP5154A VBLK Start and Stop registers provide relative
adjustments to the default VBLK interval. After configuring the desire VBLK interval, the Luma bypass (bit
4) in the Luminance Processing Control #1 register (07h) must be set to a logic 1 to enable raw data
output. Table 6 shows the default I2C registers with a modified VBLK interval for Line 21 inclusion, while
Table 7 shows the default 625-line setup. Also shown in Figure 5 and Figure 6 are digital captures of the
TVP5154A ITU-R BT.656 output for comparison of normal operation and raw data operation. Insertion of a
4-byte preamble (00h FFh FFh 60h) prior to the start of the raw data is optional in I2C register 07h.
Table 6. 525-Line Raw Data Setup to Include Line 21
I2C Subaddress
Default
I2C Data
07h
00h
10h
Enable raw data (Luma bypass) and Preamble
18h
00h
00h
VBLK Start = default line 1
19h
00h
01h
VBLK Stop = default +1 to include line 21
Description
Table 7. 625-Line Raw Data Setup
2
I C Subaddress
Default
I2C Data
07h
00h
10h
Enable raw data (Luma bypass) and Preamble
18h
00h
00h
VBLK Start = default line 623
19h
00h
00h
VBLK Stop = default
Description
Note: Detailed descriptions of the TVP5154A I2C registers related to VBI Raw Data Mode are shown in
Appendix A.
Example (set up NTSC for raw data on lines 1 through 21)
1. Set up VBLK interval.
• Write 01h to register 19h to include line 21.
2. Enable Raw Data Mode
• Write 10h to register 07h to enable raw data mode.
10
TVP5154A VBI Quick Start
SLEA104 – July 2010
Copyright © 2010, Texas Instruments Incorporated
VBI Raw Data Mode
www.ti.com
Figure 5. Line 21 Closed Caption ITU-R BT.656 Digital Output Capture with YUV Samples Present
Raw Data Mode disabled
Figure 6. Line 21 Closed Caption ITU-R BT.656 Digital Output Capture in Raw Data Mode
UV (chroma) data are replaced with Y (luma) data
Note: The full-scale transitions are embedded sync codes.
SLEA104 – July 2010
TVP5154A VBI Quick Start
Copyright © 2010, Texas Instruments Incorporated
11
www.ti.com
Appendix A Subset of the TVP5154A VDP I2C Registers
VDP Closed Caption Data
Address
90h-93h
Read only
Address
90h
91h
92h
93h
7
6
5
4
Closed Caption
Closed Caption
Closed Caption
Closed Caption
Field
Field
Field
Field
3
1 byte
1 byte
2 byte
2 byte
2
1
0
1
2
1
2
These registers contain the closed caption data arranged in bytes per field.
VDP WSS/CGMS Data
Address
94h-99h
WSS/CGMS NTSC:
Read only
Address
94h
95h
96h
97h
98h
99h
7
6
b13
b12
b13
b12
5
b5
b11
b19
b5
b11
b19
4
b4
b10
b18
b4
b10
b18
3
b4
b9
b17
b4
b9
b17
2
b2
b8
b16
b2
b8
b16
1
b1
b7
b15
b1
b7
b15
0
b0
b6
b14
b0
b6
b14
WSS/CGMS
WSS/CGMS
WSS/CGMS
WSS/CGMS
WSS/CGMS
WSS/CGMS
Byte
Field
Field
Field
Field
Field
Field
1
b1
b9
0
b0
b8
Byte
WSS/CGMS Field 1 byte 1
WSS/CGMS Field 1 byte 2
b1
b7
b0
b6
WSS/CGMS Field 2 byte 1
WSS/CGMS Field 2 byte 2
1
1
1
2
2
2
byte
byte
byte
byte
byte
byte
1
2
3
1
2
3
These registers contain the wide screen signaling data for NTSC.
Bits 0 - 1
Represent word 0, aspect ratio
Bits 2 - 5
Represent word 1, header code for word 2
Bits 6 - 13
Represent word 2, copy control
Bits 14 - 19 Represent word 3, CRC
WSS/CGMS PAL/SECAM:
Read only
Address
94h
95h
96h
97h
98h
99h
7
b7
6
b6
5
b5
b13
4
b4
b12
3
b4
b11
b7
b6
b5
b11
b4
b10
b4
b9
2
b2
b10
Reserved
b2
b8
Reserved
These registers contain the wide screen signaling data for PAL/SECAM:
Bits 0 - 3
Represent group 1, aspect ratio
Bits 4 - 7
Represent group 2, enhanced services
Bits 8 - 10
Represent group 3, subtitles
Bits 11 - 13 Represent group 4, others
12
TVP5154A VBI Quick Start
SLEA104 – July 2010
Copyright © 2010, Texas Instruments Incorporated
Appendix A
www.ti.com
VDP VPS, EPG Data
Address
9Ah-A6h
VPS:
Read only
Address
9Ah
9Bh
9Ch
9Dh
9Eh
9Fh
A0h
A1h
A2h
A3h
A4h
A5h
A6h
7
6
5
4
3
2
1
0
VPS byte 1
VPS byte 2
VPS byte 3
VPS byte 4
VPS byte 5
VPS byte 6
VPS byte 7
VPS byte 8
VPS byte 9
VPS byte 10
VPS byte 11
VPS byte 12
VPS byte 13
These registers contain the entire VPS data line except the clock run-in code or the frame code.
EPG:
Read Only
Address
9Ah
9Bh
9Ch
9Dh
9Eh
9Fh
A0h
A1h
A2h
A3h
A4h
A5h
A6h
7
6
5
4
3
EPG Frame Code
EPG byte 1
EPG byte 2
EPG byte 3
EPG byte 4
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
2
1
0
6
5
4
3
VITC Frame byte 1
VITC Frame byte 2
VITC Seconds byte 1
VITC Seconds byte 2
VITC Minutes byte 1
VITC Minutes byte 2
VITC Hours byte 1
VITC Hours byte 2
VITC CRC byte
2
1
0
VDP VITC Data
Address
A7h-AFh
Read only
Address
A7h
A8h
A9h
AAh
ABh
ACh
ADh
AEh
AFh
7
These registers contain the VITC data.
SLEA104 – July 2010
TVP5154A VBI Quick Start
Copyright © 2010, Texas Instruments Incorporated
13
Appendix A
www.ti.com
VDP FIFO Read Data
Address
B0h
Read only
7
6
5
4
3
FIFO read data [7:0]
2
1
0
FIFO read data [7:0]: This register is provided to access VBI FIFO data through the host port. All forms of teletext data come directly from
the FIFO, while all other forms of VBI data can be programmed to come from registers or from the FIFO. Current status of the FIFO can be
found at address C6h and the number of bytes in the FIFO is located at address C7h. If the host port is to be used to read data from the
FIFO, the FIFO output control register CDh bit 0 must be set to 1.
VDP Configuration RAM Register
Address
Address
C3h
C4h
C5h
C3h-C5h
7
6
5
4
3
Configuration data
RAM address [7:0]
Reserved
2
1
0
RAM
address 8
The configuration RAM data is provided to initialize the VDP with initial constants. The configuration RAM is 512 bytes organized as 32
different configurations of 16 bytes each. The first 12 configurations are defined for the current VBI standards. An additional 2 configurations
can be used as a custom programmed mode for unique standards like Gemstar.
Address C3h is used to read or write to the RAM. The RAM internal address counter is automatically incremented with each transaction.
Addresses C5h and C4h make up a 9-bit address to load the internal address counter with a specific start address. This can be used to
write a subset of the RAM for only those standards of interest. Registers D0h-FBh must all be programmed with FFh, before writing or
reading the configuration RAM. Full field mode (CFh) must be disabled as well.
14
TVP5154A VBI Quick Start
SLEA104 – July 2010
Copyright © 2010, Texas Instruments Incorporated
Appendix A
www.ti.com
VDP Status
Address
C6h
Read only
7
FIFO full
error
6
FIFO
empty
5
TTX
available
4
CC field 1
available
3
CC field 2
available
2
WSS/CGMS
available
1
VPS/Gemstar
2x available
0
VITC
available
The VDP status register indicates whether data is available in either the FIFO or data registers, and status information about the FIFO.
Reading data from the corresponding register does not clear the status flags automatically. These flags are only reset by writing a 1 to the
respective bit. However, bit 6 is updated automatically.
FIFO full error:
0
No FIFO full error
1
FIFO was full during a write to FIFO.
The FIFO full error flag is set when the current line of VBI data can not enter the FIFO. For example, if the FIFO has only 10 bytes left and
teletext is the current VBI line, the FIFO full error flag is set, but no data is written because the entire teletext line will not fit. However, if the
next VBI line is closed caption requiring only 2 bytes of data plus the header, this goes into the FIFO. Even if the full error flag is set.
FIFO empty:
0
FIFO is not empty.
1
FIFO is empty.
TTX available:
0
Teletext data is not available.
1
Teletext data is available.
CC field 1 available:
0
Closed caption data from field 1 is not available.
1
Closed caption data from field 1 is available.
CC field 2 available:
0
Closed caption data from field 2 is not available.
1
Closed caption data from field 2 is available.
WSS/CGMS available:
0
WSS/CGMS data is not available.
1
WSS/CGMS data is available.
VPS/Gemstar 2x available:
0
VPS/Gemstar 2x data is not available.
1
VPS/Gemstar 2x data is available.
VITC available:
0
VITC data is not available.
1
VITC data is available.
VDP FIFO Word Count
Address
C7h
7
6
5
4
3
Number of words
2
1
0
2
1
0
This register provides the number of words in the FIFO. 1 word equals 2 bytes.
VDP FIFO Interrupt Threshold
Address
C8h
7
6
5
4
3
Number of words
This register is programmed to trigger an interrupt when the number of words in the FIFO exceeds this value (default 80h). This interrupt
must be enabled at address C1h. 1 word equals 2 bytes.
SLEA104 – July 2010
TVP5154A VBI Quick Start
Copyright © 2010, Texas Instruments Incorporated
15
Appendix A
www.ti.com
VDP FIFO Reset
Address
C9h
7
6
5
4
3
2
1
0
2
1
0
Any data
Writing any data to this register resets the FIFO and clears any data present.
VDP Line Number Interrupt
Address
CAh
7
Field 1
enable
6
Field 2
enable
5
4
3
Line number
This register is programmed to trigger an interrupt when the video line number matches this value in bits 5:0. This interrupt must be enabled
at address C1h. The value of 0 or 1 does not generate an interrupt.
Field 1 enable:
0
Disabled (default)
1
Enabled
Field 2 enable:
0
Disabled (default)
1
Enabled
Line number: (default 00h)
VDP Pixel Alignment
Address
CBh-CCh
Address
CBh
CCh
7
6
5
4
3
Switch pixel [7:0]
2
1
Reserved
0
Switch pixel [9:8]
These registers form a 10-bit horizontal pixel position from the falling edge of sync, where the VDP controller initiates the program from one
line standard to the next line standard. For example, the previous line of teletext to the next line of closed caption. This value must be set
so that the switch occurs after the previous transaction has cleared the delay in the VDP, but early enough to allow the new values to be
programmed before the current settings are required.
VDP FIFO Output Control
Address
CDh
Default (00h)
7
6
5
4
Reserved
3
2
1
0
Host access enable
Host access enable:
This register is programmed to allow host port access to the FIFO or allow all VDP data to go out the video port.
0
Output FIFO data to the video output Y[7:0]
1
Allow host port access to the FIFO data (default)
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TVP5154A VBI Quick Start
SLEA104 – July 2010
Copyright © 2010, Texas Instruments Incorporated
Appendix A
www.ti.com
VDP Full-Field Enable
Address
CFh
Default (00h)
7
6
5
4
Reserved
3
2
1
0
Full field enable
Full field enable:
0
Disable full field mode (default)
1
Enable full field mode
This register enables the full-field mode. In this mode, all lines outside the vertical blank area and all lines in the line-mode register
programmed with FFh are sliced with the definition of register FCh. Values other than FFh in the line-mode registers allow a different slice
mode for that particular line.
SLEA104 – July 2010
TVP5154A VBI Quick Start
Copyright © 2010, Texas Instruments Incorporated
17
Appendix A
www.ti.com
VDP Line Mode
Address
D0h-FBh
Read only
Address
D0h
D1h
D2h
D3h
D4h
D5h
D6h
D7h
D8h
D9h
DAh
DBh
DCh
DDh
DEh
DFh
E0h
E1h
E2h
E3h
E4h
E5h
E6h
E7h
E8h
E9h
EAh
EBh
ECh
EDh
EEh
EFh
F0h
F1h
F2h
F3h
F4h
F5h
F6h
F7h
F8h
F9h
FAh
FBh
18
7
6
5
4
3
Line 6 Field 1
Line 6 Field 2
Line 7 Field 1
Line 7 Field 2
Line 8 Field 1
Line 8 Field 2
Line 9 Field 1
Line 9 Field 2
Line 10 Field 1
Line 10 Field 2
Line 11 Field 1
Line 11 Field 2
Line 12 Field 1
Line 12 Field 2
Line 13 Field 1
Line 13 Field 2
Line 14 Field 1
Line 14 Field 2
Line 15 Field 1
Line 15 Field 2
Line 16 Field 1
Line 16 Field 2
Line 17 Field 1
Line 17 Field 2
Line 18 Field 1
Line 18 Field 2
Line 19 Field 1
Line 19 Field 2
Line 20 Field 1
Line 20 Field 2
Line 21 Field 1
Line 21 Field 2
Line 22 Field 1
Line 22 Field 2
Line 23 Field 1
Line 23 Field 2
Line 24 Field 1
Line 24 Field 2
Line 25 Field 1
Line 25 Field 2
Line 26 Field 1
Line 26 Field 2
Line 27 Field 1
Line 27 Field 2
TVP5154A VBI Quick Start
2
1
0
SLEA104 – July 2010
Copyright © 2010, Texas Instruments Incorporated
Appendix A
www.ti.com
(continued)
These registers program the specific VBI standard at a specific line in the video field.
Bit 7:
0
1
Disable filtering of null bytes in closed caption modes
Enable filtering of null bytes in closed caption modes (default)
In teletext modes, bit 7 enables the data filter function for that particular line. If it is set to 0, then the data filter passes all data on that line.
Bit 6:
0
1
Send VBI data to registers only.
Send VBI data to FIFO and the registers. Teletext data only goes to FIFO. (default)
Bit 5:
0
1
Allow VBI data with errors in the FIFO
Do not allow VBI data with errors in the FIFO (default)
Bit 4:
0
1
Do not enable error detection and correction
Enable error detection and correction (when bits [3:0] = 1 2, 3, and 4 only) (default)
Bits [3:0]:
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
WST SECAM
WST PAL B
WST PAL C
WST NTSC
NABTS NTSC
TTX NTSC
CC PAL
CC NTSC
WSS/CGMS-A PAL
WSS/CGMS NTSC
VITC PAL
VITC NTSC
VPS PAL
Gemstar 2x Custom 1
Custom 2
Active video (VDP off) (default)
A value of FFh in the line mode registers is required for any line to be sliced as part of the full field mode.
VDP Full-Field Enable
Address
FCh
Default (7Fh)
7
6
5
4
3
Full field mode [7:0]
2
1
0
Full field mode [7:0]: This register programs the specific VBI standard for full-field mode. It can be any VBI standard. Individual line settings
take priority over the full-field register. This allows each VBI line to be programmed independently but have the remaining lines in full-field
mode. The full-field mode register has the same bits definition as line-mode registers. (default 7Fh)
SLEA104 – July 2010
TVP5154A VBI Quick Start
Copyright © 2010, Texas Instruments Incorporated
19
www.ti.com
Appendix B Sample WinVCC CMD File for VBI Setup
/////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////
// These commands can be used with the WinVCC4 EVM software to configure the Line Mode
// registers for a typical NTSC VBI setup.
// The WR_REG commands are direct writes to the I2C registers.
// Each command shown writes 1 byte to the I2C address
// specified in the command line.
BEGIN_DATASET
DATASET_NAME,"TVP5154A NTSC VDP/VBI SETUP"
INCLUDE, VDPRegsIdle.inc
// Set VDP registers to their default state
INCLUDE, SlicerRAM_601.inc
// Load VDP configuration RAM
WR_REG,VID_DEC,0x01,0xD8,0x44
WR_REG,VID_DEC,0x01,0xD9,0x44
WR_REG,VID_DEC,0x01,0xE0,0x0B
WR_REG,VID_DEC,0x01,0xE1,0x0B
WR_REG,VID_DEC,0x01,0xEC,0x09
WR_REG,VID_DEC,0x01,0xED,0x09
WR_REG,VID_DEC,0x01,0xEE,0x07
WR_REG,VID_DEC,0x01,0xEF,0x07
//
//
//
//
//
//
//
//
Line10
Line10
Line14
Line14
Line20
Line20
Line21
Line21
(Field
(Field
(Field
(Field
(Field
(Field
(Field
(Field
1)-TTX NTSC
2)-TTX NTSC
1)-VITC NTSC
2)-VITC NTSC
1)-WSS/CGMS NTSC
2)-WSS/CGMS NTSC
1)-CC NTSC
2)-CC NTSC
WR_REG,VID_DEC,0x01,0xCD,0x01
WR_REG,VID_DEC,0x01,0xCB,0x4E
WR_REG,VID_DEC,0x01,0xCC,0x00
// Enable FIFO access, disable ANC data
// Set Pixel Alignment [7:0] to 4Eh
// Set Pixel Alignment [9:8] to 0
END_DATASET
/////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////
// These commands can be used with the WinVCC4 EVM software to configure the Line Mode
// registers for a typical PAL VBI setup. For PAL systems, the Line Mode register has
// a +3 line offset relative to the actual line number. Each command shown writes
// 1 byte to the I2C address specified in the command line.
/////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////
BEGIN_DATASET
DATASET_NAME,"TVP5154A PAL VDP/VBI SETUP"
INCLUDE, VDPRegsIdle.inc
// Set VDP registers to their default FFh state
INCLUDE, SlicerRAM_601.inc
// Load VDP configuration RAM
WR_REG,VID_DEC,0x01,0xD8,0x41
WR_REG,VID_DEC,0x01,0xD9,0x41
WR_REG,VID_DEC,0x01,0xEA,0x0C
WR_REG,VID_DEC,0x01,0xEB,0x0C
WR_REG,VID_DEC,0x01,0xF0,0x0A
WR_REG,VID_DEC,0x01,0xF1,0x0A
WR_REG,VID_DEC,0x01,0xF6,0x06
WR_REG,VID_DEC,0x01,0xF7,0x06
WR_REG,VID_DEC,0x01,0xF8,0x08
WR_REG,VID_DEC,0x01,0xF9,0x08
//
//
//
//
//
//
//
//
//
//
Line10
Line10
Line19
Line19
Line22
Line22
Line25
Line25
Line26
Line26
(Field
(Field
(Field
(Field
(Field
(Field
(Field
(Field
(Field
(Field
1)-TTX-B PAL(Line7)
2)-TTX-B PAL (Line7
1)-VPS PAL (Line 16)
2)-VPS PAL (Line 16)
1)-VITC PAL(Line 19)
2)-VITC PAL(Line 19)
1)-CC PAL(Line 22)
2)-CC PAL(Line 22)
1)-WSS/CGMS PAL(Line 23)
2)-WSS/CGMS PAL(Line 23)
WR_REG,VID_DEC,0x01,0xCD,0x01
// Enable FIFO access, disable ANC data
WR_REG,VID_DEC,0x01,0xCB,0x4E
// Set Pixel Alignment [7:0] to 4Eh
WR_REG,VID_DEC,0x01,0xCC,0x00
// Set pixel Alignment [9:8] to 0
END_DATASET
/////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////
20
TVP5154A VBI Quick Start
SLEA104 – July 2010
Copyright © 2010, Texas Instruments Incorporated
www.ti.com
Appendix C Example TVP5154A C Code
// TVP5154A WSS/CGMS Example
#define TVP5154A 0xB8;
byte I2C_RegAddress,Status;
byte I2C_Data;
int CRAM_Address, count;
// TVP5154A main I2C address
// recommended WSS/CGMS settings
byte WSS_ARRAY[]={0x38,0,0x3F,0,0,0x71,0x6E,0x43,0x63,0x7C,0x08,0,0,0,0x39,0};
byte WSSData[3];
// data array for WSS/CGMS
////////////////////////////////////////////////////////////////////////////////
// initialize
////////////////////////////////////////////////////////////////////////////////
// load WSS/CGMS C-RAM
I2C_RegAddress = 0xD0;
// starting address of Line Mode registers
I2C_Data = 0xFF;
For (count = 0; count < 44; count ++)
{
I2CWriteByte(TVP5154A, I2C_RegAddress, I2C_Data); //write FFh to Line Mode registers
I2C_RegAddress ++;
}
I2CWriteByte(TVP5154A, 0xCF, 0);
// disable full field mode
CRAM_Address = 0x130;
// address of NTSC WSS/CGMS C-RAM block
I2CWriteByte(TVP5154A, 0xC4, 0x30);
I2CWriteByte(TVP5154A, 0xC5, 0x01);
// load C4h with C-RAM address[7:0]
// load C5h with C-RAM address[8]
For (count = 0; count < 16; count++)
{
I2CWriteByte(TVP5154A, 0xC3, WSS_ARRAY[count]); // write 16 bytes of WSS/CGMS C-RAM
}
// data to register C3h.
I2CWriteByte(TVP5154A, 0xCB, 0x4E);
// Set Pixel Alignment[7:0]to 0x4E
I2CWriteByte(TVP5154A, 0xCC, 0x00);
// Set Pixel Alignment[9:8]to 0x00
// NTSC WSS/CGMS Line Mode setup for line 20 of both fields
I2CWriteByte(TVP5154A, 0xEC, 0x09);
// line 20 field 1 (0xEC), mode bits = 0x09
I2CWriteByte(TVP5154A, 0xED, 0x09);
// line 20 field 2 (0xED), mode bits = 0x09
// PAL WSS/CGMS Line Mode setup for line 23 (source input) of both fields.
// PAL line numbering has 3 line offset so the Line 26 line mode registers are used.
I2CWriteByte(TVP5154A, 0xF8, 0x08);
I2CWriteByte(TVP5154A, 0xF9, 0x08);
I2CWriteByte(TVP5154A, 0xCD, 0x01);
// line 26 field 1 (0xF8), mode bits = 0x08
// line 26 field 2 (0xF9), mode bits = 0x08
// disable ANC data, enable FIFO access.
//////////////////////////////////////////////////////////////////////////////////////
// check status and get sliced data
//////////////////////////////////////////////////////////////////////////////////////
I2CReadBuffer(TVP5154A,0xC6,&Status,1);
//read 1 byte(status)from register C6h
if ((Status & 0x20) ==1)
{
I2CReadBuffer(TVP5154A,0x94,&WSSData[0],3);
I2CWriteByte(TVP5154A,0xC6,0x20);
//if WSS/CGMS bit set,
// read the 3 WSS/CGMS bytes
// at WSS/CGMS data registers 94h–96h.
// clear WSS/CGMS available status bit
}
SLEA104 – July 2010
TVP5154A VBI Quick Start
Copyright © 2010, Texas Instruments Incorporated
21
www.ti.com
Appendix D VBI Raw Data I2C Registers
Luminance Processing Control #1 Register
Address
07h
7
Luma bypass
mode
6
Pedestal not
present
5
Disable raw
header
4
Luma bypass
during vertical
blank
3
2
1
0
Luminance signal delay with respect to chrominance signal
Luma bypass mode:
0
Input video bypasses the chroma trap and comb filters. Chroma outputs are forced to zero (default).
1
Input video bypasses the whole luma processing. Raw A/D data is output alternatively as UV data and Y data at SCLK rate.
The output data is properly clipped to comply with ITU-R BT.601 coding range. Only valid for 8-bit YUV output format (YUV
output format = 100 or 111 at register 0Dh).
Pedestal not present:
0
1
7.5 IRE pedestal is present on the analog video input signal (default).
Pedestal is not present on the analog video input signal.
Disable raw header:
0
Insert 656 ancillary headers for raw data.
1
Disable 656 ancillary headers.
Luminance bypass enabled during vertical blanking:
0
Disabled (default)
1
Enabled
Luminance bypass occurs for the duration of the vertical blanking as defined by registers 18h and 19h. This feature may be used to prevent
distortion of test and data signals present during the vertical blanking interval. Luma signal delay with respect to chroma signal in pixel clock
increments (range -8 to +7 pixel clocks):
1111
-8 pixel clocks delay
1011
-4 pixel clocks delay
1000
-1 pixel clocks delay
0000
0 pixel clocks delay (default)
0011
3 pixel clocks delay
0111
7 pixel clocks delay
Vertical Blanking Start Register
Address
7
18h
6
5
4
3
Vertical blanking start
2
1
0
Vertical blanking (VBLK) start:
0111 1111
127 lines after start of vertical blanking interval
0000 0001
1 line after start of vertical blanking interval
0000 0000
Same time as start of vertical blanking interval (default)
1000 0001
1 line before start of vertical blanking interval
1111 1111
128 lines before start of vertical blanking interval
Vertical blanking is adjustable with respect to the standard vertical blanking intervals. The setting in this register determines the timing of
the GPCL/VBLK signal when it is configured to output vertical blank. The setting in this register also determines the duration of the luma
bypass function (see register 07h).
22
TVP5154A VBI Quick Start
SLEA104 – July 2010
Copyright © 2010, Texas Instruments Incorporated
Appendix D
www.ti.com
Vertical Blanking Stop Register
Address
1ph
7
6
5
4
3
Vertical blanking stop
2
1
0
Vertical blanking (VBLK) stop:
0111 1111 127 lines after stop of vertical blanking interval
0000 0001 1 line after stop of vertical blanking interval
0000 0000 Same time as stop of vertical blanking interval (default)
1000 0001 1 line before stop of vertical blanking interval
1111 1111 128 lines before stop of vertical blanking interval
Vertical blanking is adjustable with respect to the standard vertical blanking intervals. The setting in this register determines the timing of
the GPCL/VBLK signal when it is configured to output vertical blank (see register 03h). The setting in this register also determines the
duration of the luma bypass function (see register 07h).
SLEA104 – July 2010
TVP5154A VBI Quick Start
Copyright © 2010, Texas Instruments Incorporated
23
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