TP6312
1/4 TO 1/11-DUTY VFD CONTROLLER/DRIVER
General Description
The TP6312 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 drivelines, a
display memory, a control circuit, and a Key scan
circuit.
Serial data is input to TP6312 through a
This VFD controller/driver
three-line serial interface.
microcomputer.
Features
Multiple display modes (11-segment & 11-digit to
16-segment & 4-digit)
Key scanning (6
×
4 matrices)
Dimming circuit (eight steps)
High-voltage output (V
DD
– 35V max)
LED ports (4 chs, 20 mA max)
General-purpose input port (4 bits)
No external resistor necessary for driver outputs
(P-ch open-drain + pull-down resistor output)
Serial interface (CLK, STB, D
IN
, D
OUT
)
is ideal as a peripheral device of a single-chip
Ordering Information
TP 6312
Footprint
Version
Package Type
Package Type
F: LQFP
S: 2.0 mm
Footprint
L: 3.2 mm
Block Diagram
Dimming circuit
Command decoder
D
IN
16-bit output latch
D
OUT
Serial I/F
CLK
STB
Display memory
16bit x 11 word
16
11
Segment driver
Seg
1
Seg
11
5
R
Segment/grid driver
Seg
12
/Gird
11
Data selector
OSC
Timing generator key
scan
16-bit output latch
5
Seg
16
/Gird
7
Key1
to
Key4
11
4
6
Grid driver
Key data memory
(4x6)
5
Grid
1
Grid
6
SW1
to
SW4
4 bit latch
4 bit latch
V
DD
(+5V)
LED
1
LED
4
V
SS
(0V)
V
EE
(-30V)
4
Version 1.1
September 2003
Page 1 of 9
http://www.topro.com.tw
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