W66880CF
VFD CONTROLLER/DRIVER
Winbond Corporate Headquarters
Tel : 886-3-5790666
Fax : 886-3-5796139
Taipei Sales Office
Tel : 886-2-7190505
Fax : 886-2-7197502
Winbond Electronics North America Corp.
Tel : 1-408-9436666
Fax : 1-408-9436668
Winbond Electronics H.K. Ltd.
Tel : 852-27513100
Fax : 852-27552064
Details are subject to change without notice. All trademarks are property of their respective holders.
Apr. 1999
GENERAL DESCRIPTION
The W66880CF is a VFD (Vacuum Fluorescent Display)
controller/ driver. It can be programmed to drive a VFD
with 4 grids by 16 segments to 8 grids by 14 segments.
The W66880CF also includes a 24-key key scan circuit
and four LED ports and four general purpose input ports.
Data communication with the W66880CF is via a serial
interface.
FEATURES
Flexible display modes (4 to 8 grids)
-
4 grids
16 segments to 8 grids
14 segments
6
4 matrix key scanning
8 steps dimming circuit
High voltage output (V
DD
- V
EE
= 30V max)
Four 15 mA LED ports
Four general-purpose input port
Internal driver output pull-down resisters
Only one external resister is needed for the on chip
oscillator
Simple serial interface
44-pin plastic QFP package
APPLICATIONS
VFD display driving and panel function control
Functional Block
Pin Configuration
V
DD
SW1
SW2
SW3
SW4
CLK
STB
Key1
Key2
Key3
Key4
Sg1/KS1
Sg2/KS2
Sg3/KS3
Sg7
Sg9
Sg10
Sg12
G4
G3
G1
V
SS
V
DD
LED1
OSC
44
43
42
41
40
39
38
37
36
35
34
1
2
3
4
5
6
7
8
9
10
11
33
32
31
30
29
28
27
26
25
24
23
12
13
14
15
16
17
18
19
20
21
22
W66880
Dout
Sg4/KS4
Sg5/KS5
Sg6/KS6
Sg8
Sg11
Din
V
SS
Sg13
Sg16/G7
Sg15/G8
Sg14
G6
G5
G2
LED2
LED3
LED4
V
EE
Din
Dout
CLK
STB
OSC
Key[1:4]
SW[1:4]
LED[1:4]
Sg[1:14]
G[1:6]
R
V
DD
4
16
14
2
2
8
6
2
key data memory
Scan Timing
Generator
Display memory
16 bits x 8 words
Serial
interface
OSC
Data
switch
Segment
Driver
Multi-
plexed
driver
Grid
driver
4-bit input latch
4-bit output latch
4
4
V
DD
V
EE
V
SS
Sg[15:16]
/G[8:7]
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