Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
VFD Driver/Controller IC
PT6313-S
DESCRIPTION
PT6313-S is a Vacuum Fluorescent Display (VFD) Controller driven on a 1/4 to 1/8 duty factor. Eight
segment output lines, 4 grid output lines, 4 segment/grid output drive lines, one display memory,
control circuit, key scan circuit are all incorporated into a single chip to build a highly reliable peripheral
device for a single chip micro computer. Serial data is fed to PT6313-S via a three-line serial interface.
It is housed in a 28pins, SOP.
FEATURES
•
•
•
•
•
•
•
•
CMOS Technology
Low Power Consumption
Key Scanning (8 x 2 matrix)
Multiple Display Modes: (8 Segments, 8 Digits to 12 Segments, 4 Digits)
8-Step Dimming Circuitry
Serial Interface for Clock, Data Input, Data Output, Strobe Pins
No External Resistors Needed for Driver Outputs
Available in 28pins, SOP
APPLICATION
•
Microcomputer Peripheral Devices
PT6313-S V1.2
-1-
September, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
VFD Driver/Controller IC
PT6313-S
BLOCK DIAGRAM
SG1/KS1
Control
DIN
DOUT
CLK
STB
Serial
Data
Interface
Segment
Driver/
Display Memory
Grid
Driver/
Key Scan
Output
OSC
OSC
R
SG2/KS2
SG3/KS3
SG4/KS4
SG5/KS5
SG6/KS6
SG7/KS7
SG8/KS8
SG9/GR8
SG10/GR7
Timing Generator
SG11/GR6
SG12/GR5
Key Matrix Memory
GR1
Grid
Driver
GR2
GR3
GR4
Dimming Circuit
K1
K2
VDD
GND
VEE
PT6313-S V1.2
-2-
September, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
VFD Driver/Controller IC
PT6313-S
PIN CONFIGURATION
CLK
STB
K1
K2
VSS
VDD
SG1/KS1
SG2/KS2
SG3/KS3
SG4/KS4
SG5/KS5
SG6/KS6
SG7/KS7
SG8/KS8
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
DIN
DOUT
OSC
VSS
VDD
GR1
GR2
GR3
GR4
SG12/GR5
SG11/GR6
SG10/GR7
SG9/GR8
VEE
P T 63 1 3- S
22
21
20
19
18
17
16
15
PT6313-S V1.2
-3-
September, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
VFD Driver/Controller IC
PT6313-S
PIN DESCRIPTION
Pin Name
CLK
I/O
I
Description
Clock Input Pin
This pin reads serial data at the rising edge and
outputs data at the falling edge.
Serial Interface Strobe Pin
The data input after the STB has fallen is
processed as a command. When this in is
“HIGH”, CLK is ignored.
Key Data Input Pins
The data inputted to these pins is latched at the
end of the display cycle.
Logic Ground Pin
Logic Power Supply
High-Voltage Segment Output Pins
Also acts as the Key Source.
Pull-Down Level
High-Voltage Segment Output Pins
High-Voltage Grid Output Pins
Oscillator Input Pin
A resistor is connected to this pin to determine
the oscillation frequency.
Data Output Pin (N-Channel, Open-Drain)
This pin outputs serial data at the falling edge of
the shift clock (starting from the lower bit).
Data Input Pin
This pin inputs serial data at the rising edge of
the shift clock (starting from the lower bit).
Pin No.
1
STB
I
2
K1 to K2
VSS
VDD
SG1/KS1 to SG8/KS8
VEE
SG9/GR8 to SG12/GR5
GR4 to GR1
OSC
I
-
-
O
-
O
O
I
3, 4
5, 25
6, 24
7 to 14
15
16 to 19
20 to 23
26
DOUT
O
27
DIN
I
28
PT6313-S V1.2
-4-
September, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
VFD Driver/Controller IC
PT6313-S
FUNCTION DESCRIPTION
COMMANDS
Commands determine the display mode and status of PT6313-S. A command is the first byte (b0 to b7)
inputted to PT6313-S via the DIN Pin after STB Pin has changed from “HIGH” to “LOW” State. If for
some reason the STB Pin is set to “HIGH” while data or commands are being transmitted, the serial
communication is initialized, and the data/commands being transmitted are considered invalid.
COMMAND 1: DISPLAY MODE SETTING COMMANDS
PT6313-S provides 4 display mode settings as shown in the diagram below: As stated earlier a
command is the first one byte (b0 to b7) transmitted to PT6313-S via the DIN Pin when STB is “LOW”.
However, for these commands, the bits 4 to 6 (b3 to b5) are ignored, bits 7 & 8 (b6 to b7) are given a
value of “0”.
The Display Mode Setting Commands determine the number of segments and grids to be used (1/4 to
1/8 duty, 12 to 8 segments).
When Power is turned “ON”, the 8-digit, 8-segment mode is selected.
MSB
0
0
-
-
-
LSB
b2 b1 b0
Display Mode Settings:
000: 4 digits, 12 segments
001: 5 digits, 11 segments
010: 6 digits, 10 segments
011: 7 digits, 9 segments
100: 8 digits, 8 segments
Not Relevant
PT6313-S V1.2
-5-
September, 2005
stm32/stm8
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