AD6312
1/4- to 1/11 Duty VFD Controller/Driver



This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. A4 Dec 29, 2003
1/13

null Features

˙ 4-pin serial interface
˙ Key scanning (6× 4 matrices)
˙ Programming display modes (11-segments & 11-
digits to 16-segments & 6-digits)
˙ Programming dimming step
˙ High-voltage output (V
DD
-35V max).
˙ 4 channels LED ports.
˙ 4-pin General-purpose input port
˙ Built-in oscillator
˙ No external resistor necessary for driver outputs

null General Description

The AD6312 is a VFD (Vacuum Fluorescent
Display) controller/driver that is driven on a 1/4- to
1/11 duty factor (include key scan). It consists of 5
segment output lines, 6 segment/key scan output
lines, 6 grid output lines, 5 segment/grid output
drive lines, a display memory, a control circuit, and
a key scan circuit. Serial data is input to the
AD6312 through a four-line serial interface.




null Pin Assignments


Grid4
Grid3
Grid2
Grid1
VDD
LED4
LED3
LED2
LED1
VSS
OSC
Seg8
Seg7
Seg6 / KS6
VDD
Key4
Key3
V
EE
Seg
16
/ Grid
7
Grid
6
Grid
5
Key
2
Key
1
STBCLK
V
SS
D
IN
D
OUT
Sw
4
Sw
3
Sw
2
Sw
1
Seg5 / KS5
Seg4 / KS4
Seg3 / KS3
Seg2 / KS2
Seg1 / KS1
Seg
15
/ Grid
8
Seg
14
/ Grid
9
Seg
13
/ Grid
10
Seg
12
/ Grid
11
Seg
11
Seg
10
Seg
9
34
35
36
37
38
39
40
41
42
43
44
22
21
20
19
18
17
16
15
14
13
12
1110987654321
2324252627282930313233




Use all power pins.