VFD Driver/Controller IC
PT6312
PT6312 v2.2
Page 1
June 2002
Tel : 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
DESCRIPTION
PT6312 is a Vacuum Fluorescent Display (VFD) Controller driven on a 1/4 to 1/11 duty factor. Eleven
segment output lines, 6 grid output lines, 5 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 PT6312 via a three-line serial interface. It is
housed in a 44-pin plastic QFP or LQFP Package and is functionally compatible with µpD16312.
FEATURES
r CMOS Technology
r Low Power Consumption
r Key Scanning (6 x 4 matrix)
r Multiple Display Modes: (11 segments, 11 digits to 16 segments, 6 digits)
r 8-Step Dimming Circuitry
r LED Ports Provided (4 channels, 20 mA max.)
r 4- Bits General Purpose Input Ports Provided
r Serial Interface for Clock, Data Input, Data Output, Strobe Pins
r No External Resistors Needed for Driver Outputs
r Functional Compatibility with µpD16312
r Available in 44-pin, QFP or LQFP Package
APPLICATION
r Micro-computer Peripheral Device
VFD Driver/Controller IC
PT6312
PT6312 v2.2
Page 3
June 2002
Tel : 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
ORDER INFORMATION
V a lid P a r t N u m b e r
P a c k a g e T y p e
P T 6 3 1 2
4 4 p i n s , Q F P P a c k a g e
P T 6 3 1 2 L Q
4 4 p i n s , L Q F P P a c k a g e
6-GRID X 16-SEGMENT VFD APPLICATION CIRCUIT
Figure 18: PT6312 Application Circuit
G3
G2
G1
G4
S11
S10
S9
S8
S7
S6
S5
S4
S3
S2
S1
S12
6-GRID x 16-SEGMENT VFD
- 2 4 V
IN4148 x 6
5 6 K
+ 5 V
PT6312
M C U
+ 5 V
1 0 K
1
2
3
4
5
6
7
8
9
10
11
12
13
2 4
25
38
39
44
43
42
41
40
14
15
16
17
18
19
20
21
22
26
220
220
220
220
1 0 K
1 0 K
+ 5 V
S14
S13
S15
S16
G 5
G 6
33
32
31
30
29
28
27
2 3
37
36
35
34
1 0 K
10K
10K
1 0 K
1 0 K
1 0 K
1 0 K
0.1uF
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