Shenzhen | R6S | SC16312 - 深圳市富满电子集团股份有限公司

深圳市富满电子有限公司
SHENZHEN FUMAN ELECTRONICS CO., LTD.
SC16312(文件编号:S&CIC0208)
1/4 to 1/11 Duty VFD Controller
Features
●
●
●
●
●
●
●
●
Logic voltage:5V
High-voltage output:VDD-30Vmax
Multiple display (11-segment & 11-digit to 16-segment &4-digit)
6×4 matrix key scanning
8 steps dimmer circuit
4 LED output ports
4-bit general purpose input port
No external resistors necessary for driver output (provides PMOS open-drain and pull-low resistor
output)
● Serial interface with MCU (CLK, CS, DI, DO)
Applications
● Consumer products panel function control
● Other similar application panel function control
● Industrial measuring instrument panel unction control
General Description
SC16312 is a VFD (Vacuum Fluorescent Display) controller driver that is driven on a 1/4 to 1/11
duty factor. It consists of 11 segment output lines, 6 grid output lines, 5 segment/grid output drives,4 LED
output ports, a control circuit, a display memory, and a key scancircuit.
Serial data inputs to the SC16312 through a three-line serial interface. This VFD controller/driver is
ideal as a peripheral device for an MCU.
Block Diagram
第 1 页 共 11 页
5
6
深圳市富满电子有限公司
SHENZHEN FUMAN ELECTRONICS CO., LTD.
D
SC16312(文件编号:S&CIC0208)
1/4 to 1/11 Duty VFD Controller
Pin Assignment
G3
G2
G1
G0
VDD
LED3
LED2
LED1
LED0
VSS
OSC
44 43 42 41 40 39 38 37 36 35 34
SW0
1
33
G4
SW1
2
32
G5
SW2
3
31
S15/G6
SW3
4
30
S14/G7
D0
5
29
S13/G8
DI
6
28
S12/G9
VSS
7
27
VEE
CLK
8
26
S11/G10
CS
9
25
S10
K0
10
24
S9
K1
11
23
S8
SC16312
- 44 QFP
C
12 13 14 15 16 17 18 19 20 21 22
S7
S5/K5
S6
S4/K4
S3/K3
S2/K2
S1/K1
S0/K0
VDD
K3
K2
Pin Description
Pin No.
1~4
Pin Name
SW0~SW3
5
DO
6
DI
7,43
VSS
8
CLK
9
CS
10 ~13
K0~K3
14, 38
VDD
15~20
S0/K0~S5/K5
21~25
S0/K0~S5/K5
Pin No.
Pin Name
I/O
Description
I 4-bit general purpose input port
Output serial data at the falling edge of the shift clock,
Starting
B
O
from low order bit. This is an NMOS open-drain Output pin.
Input serial data at the rising edge of the shift clock, starting from
I
the low order bit.
— Power supply, ground
Reads serial data at the rising edge ,and outputs data at the Falling
I
edge.
Initializes serial interface at the rising or falling edge of the
SC16312. Then it waits to receive a command. Data input After
I CS has fallen is processed as a command. While command data is
processed, current processing is stopped, and the serial interface
is initialized. While CS is high, CLK is ignored.
Keying data input to these pins is latched at the end ofA the display
I
cycle.
Title
— Posistive power supply
Size
Number
Revision
Segment
or key source output pins (dual
function). This is PMOS
OB
open-drain
and pull-low resistor
output.
Date:
2-Apr-2003
Sheet of
File:
E:\
超晶规格图
\3.12\SC16312.Ddb
Drawn
By : (dual function).This is PMOS
Segment or key source output pins
5 O
6
open-drain and pull-low resistor output.
I/O
Description
第 2 页 共 11 页
深圳市富满电子有限公司
SHENZHEN FUMAN ELECTRONICS CO., LTD.
SC16312(文件编号:S&CIC0208)
26, 28~31
S11/G10~S15/G6
O
27
VEE
—
37~32
G0~G5
O
42~39
44
LED0~LED3
OSC
O
I
1/4 to 1/11 Duty VFD Controller
Segment or Grid driver output pins. These pins are selectable for
segment or grid driving. This is PMOS open-drain and pull-low
resistor output.
VFD power supply
Grid driver output pins (Grid only). This is PMOS open-drain and
pull-low resistor output.
LED driver output ports. This is a CMOS output pin
Connected to an external resistor or an RC oscillator circuit.
Approximate internal connections
Absolute Maximum Ratings
Supply Voltage ------------------ -0.3v to 5.5v
Input Voltage ------------------- vss-0.3v to VDD+0.3v
Operating Temperature ----------- -25℃ to 75℃
Storage Temperature ------------- -50℃ to 125℃
Note:These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum
Ratings” may cause substantial damage to the device. Function of this device at other conditions
beyond those listed in the specification is not implied and prolonged exposure to extreme
conditions may affect device reliability.
第 3 页 共 11 页
深圳市富满电子有限公司
SHENZHEN FUMAN ELECTRONICS CO., LTD.
SC16312(文件编号:S&CIC0208)
1/4 to 1/11 Duty VFD Controller
D. C. Characteristics
Symbol
Parameter
Test Conditions
VDD
Conditions
-
Min.
Typ.
Max.
Unit
4.5
5
5.5
V
0
-
VDD-30
V
VDD
Logic Supply Voltage
VEE
VFD Supply Voltage
fOSC
Output Pull-low Resistor
5V
ROSS=51kΩ
350
500
650
KHz
RPL
Output Pull-low Resistor
5V
Driver output
50
100
150
KΩ
IDD
Operating Current
5V
No load,
VFD display off
-
-
5
MA
IOL
Driver Leakage Current
5V
Vo=VDD-30V
VFD driver off
-
-
-10
UA
IOL1
LED Sink Current
5V
VOL=1V
LED0~LED3
20
-
-
mA
IOH1
LED Source Current
5V
VOH=0.9VDD
LED0~LED3
-1
-
-
mA
IOH21
Segment/Key Source
Current
5V
-3
-
-
mA
IoH22
Segment/Grid Source
Current
5V
-15
-
-
mA
IoL3
DO Sink Current
5V
4
-
-
mA
VIH
“H” Input Voltage
-
-
0.7VDD
-
VDD
V
VIL
“L” Input Voltage
-
-
0
-
0.3VDD
V
VoH1
High-level Output
Voltage
5V
LED0~LED3,
IoH1=-1mA
0.9VDD
-
VDD
V
VoL1
Low-level Output
Voltage
5V
LED0~LED3,
IoL1=20MA
0
-
1
V
VoL2
Low-level Output
Voltage
5V
DO, IOL2=4mA
0
-
0.4
V
-
-
VOH=VDD-2V
S0/K0~S5/K5,
S6~S10
VoH=VDD-2V
G0~G5,
S11/G10~S1/G6
VOL=0.4V
第 4 页 共 11 页
深圳市富满电子有限公司
SHENZHEN FUMAN ELECTRONICS CO., LTD.
SC16312(文件编号:S&CIC0208)
1/4 to 1/11 Duty VFD Controller
A. C. Characteristics
Symbol
tPHL
tPLH
Parameter
Propagation Delay Time
tr1
Rise TIme
Tr2
tf
tmax
Ci
tcw
tsw
tSU
th
Fall Time
Maximum Clock Frequency
Input Capacitance
Clock Pulse Width
Strobe Pulse Width
Data Setup Time
Data Hold Time
tcs
Clock-Strobe Time
tw
Wait Time
Test Conditions
VDD
Conditions
5V CL→DO
5V CL=15pF,RL=10kΩ
CL=300PF,
5V
S0~S10
CL=300PF,
5V Go~G5,
S11/G10~S15/G6
5V CL=300pF, Sn, Gn
5V Duty=50%
5V
5V
5V
5V
5V
CLK rising edge to
5V
CS rising edge
CLK rising edge to
5V
CS rising edge
Min.
Typ.
Max.
Unit
-
-
300
100
ns
ns
-
-
2
us
-
-
0.5
us
1
400
1
100
100
-
120
15
-
us
MHz
pF
ns
ns
ns
ns
1
-
-
us
1
-
-
us
Functional Description
Display RAM and display mode
The static display RAM is organized into 22×8 bits and stores the data transmitted from an external
device to the SC16312 through a serial interface. The contents of the RAM are directly mapped to the
contents of the VFD driver. Data in the RAM can be accessed through the data setting, address setting and
display control commands. It is assigned addresses in 8-bitunit as follows:
S0 ~ S3
S4 ~ S7
S8 ~ S11
S12 ~ S15
第 5 页 共 11 页
深圳市富满电子有限公司
SHENZHEN FUMAN ELECTRONICS CO., LTD.
SC16312(文件编号:S&CIC0208)
1/4 to 1/11 Duty VFD Controller
Dimming Control
SC16312 porvides 8-step dimmer function on display by controlling the 3-bit binary command code.
The full pulse width of grid signal is divides into 16 uniform sections by PWM(pulse width
modulation )technology.
The 16 uniform sections available form 8 steps dimmer via 3-bit binary code. The 8-step dimmer
includes 1/16, 2/16, 4/16, 10/16, 11/16, 12/16, 13/16, and 14/16. The 1/16 pulse width indicates minimum
lightness. The 14/16 pulse width represents maximum lightness. The 14/16 pulse width represents
maximum lightness. (Refer to the display control command).
Key matrix and key-input data storage RAM
The key matrix scans the series key states at each level of the key strobe signal
(S0/K0~S5/K5)output of the :SC16312. The key strobe signal outputs are time-multiplexed signals from
S0/K0~S5/K5. The states of inputs K0~K3 are sampled by strobe signal S0/K0~S5/K5 and latched into
the register.
The key matrix is made up of a 6x4 matrix, as shown below.
Detail
The data of each key is stored as illustrated below. And is read with the read command, starting form
the least significant bit.
第 6 页 共 11 页
深圳市富满电子有限公司
SHENZHEN FUMAN ELECTRONICS CO., LTD.
SC16312(文件编号:S&CIC0208)
1/4 to 1/11 Duty VFD Controller
LED port
The LED port belongs to the CMOS output configuration.
Data is written to the LED port with the write command, starting from the least port’s least
significant bit. In out application (see application circuits). The user adopts an internal NMOS device to a
driver LED component by connecting VDD. When a bit of this port is 0, the corresponding LED lights;
when the bit is 1,the LED turns off. The data of bits 5 through 8 are ignored.
SW data
SC16312 provides an extra 4-bit general input port. The SW data is provided with available binary
code. The SW data is read with the read command. Starting from the least significant bit. Bits 5 through 8
of the SW data are 0.
Commands
Commands set the display mode and status of the VFD driver.
The first 1 byte input to the SC16312 through the DI pin after the CS pin has fallen, is regarded as a
command. If CS is set high while commands/data are transmitted. Serial communication is initialized,
and the commands/data being transmitted are not valid (however, the commands/data previously
transmitted remains valid).
• Display mode setting commands
These commands initialize the SC16312 and select the number of segments and the number of grids
(1/4~1/11 duty, 11 segments to 16 segments).
When these commands are executed, the display is forcibly turned off, and key scanning is selected,
nothing happens.
第 7 页 共 11 页
深圳市富满电子有限公司
SHENZHEN FUMAN ELECTRONICS CO., LTD.
SC16312(文件编号:S&CIC0208)
1/4 to 1/11 Duty VFD Controller
• Data setting commands
These commands set the data write and data read modes.
• Address setting commands
These commands set the address of the display memory.
If address 16H or higher is set, data is ignored until a valid address is set.
• Display control commands
第 8 页 共 11 页
深圳市富满电子有限公司
SHENZHEN FUMAN ELECTRONICS CO., LTD.
SC16312(文件编号:S&CIC0208)
1/4 to 1/11 Duty VFD Controller
Timing Diagrams
Key scanning and display timing
Note: n=0~5
T=1/16T
T: pulse width of segment signal is decided by oscillator frequency
One cycle of key scanning consists of one frame.
第 9 页 共 11 页
深圳市富满电子有限公司
SHENZHEN FUMAN ELECTRONICS CO., LTD.
SC16312(文件编号:S&CIC0208)
1/4 to 1/11 Duty VFD Controller
Serial communication format
Reception (command/data write)
Transmission (data read)
DO must be sure to connect an external pull-high resistor to this pin (1kΩ to 10kΩ).
Note: When data is read, a wait time “tw” of 1 μs is necessary.
Updating display memory by incrementing address
第 10 页 共 11 页
深圳市富满电子有限公司
SHENZHEN FUMAN ELECTRONICS CO., LTD.
SC16312(文件编号:S&CIC0208)
1/4 to 1/11 Duty VFD Controller
Updating specific addresses
2
3
4
Application Circuits
R6
R7
R8
R9
D1
D2
D3
D4
D5
D6
S0~S5
VDD
K0 K1 K2 K3
S0/K0
S1/K1
S2/K2
S3/K3
S4/K4
S5/K5
VDD
VFD
5 SEGMENTS
Rosc
S6~S10
OSC
IC:SC16312
CS
5 Grids/Segments
S11/G10~S15/G6
6 Grids
G0~G5
CLK
MCU
DI
VEE
D0
LED0
R1
R2
LED1
R3
LED2
R4
LED3
SW0
SW1
SW2
R5
VDD
VDD
Note: Rosc=51kΩ for oscillator resistor
R1=1~10 kΩ for external pull-high resistor
R2~R5=750 Ω ~1.2 Ω
R6~R9=10 kΩ for external pull-low resistor
D1~D6=1N4001
Ef=Fiament voltage for VFD
第 11 页 共 11 页
SW3
VSS
- 25V
Ef
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