WINBOND W66880

W66880CF
VFD CONTROLLER/DRIVER
GENERAL DESCRIPTION
•
•
•
•
•
High voltage output (VDD - VEE = 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
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
APPLICATIONS
• 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
VFD display driving and panel function control
Din
Dout
16
Segment
Driver
14
STB
Sg[1:14]
2
VDD
Data
switch
2
V SS
LED1
LED2
LED3
LED4
V DD
G1
G2
G3
G4
42
41
40
39
38
37
36
35
34
OSC
43
Sg16/G7
SW4
4
30
Sg15/G8
Dout
5
29
Sg14
Din
6
28
W66880
VSS
7
27
Sg13
VEE
CLK
8
26
Sg12
STB
9
25
Sg11
Key1 10
24
Sg10
Key2 11
23
Sg9
16
17
18
19
20
21
22
Sg3/KS3
Sg4/KS4
Sg5/KS5
Sg6/KS6
Sg7
Sg8
G[1:6]
Sg2/KS2
Grid
driver
15
Sg[15:16]
/G[8:7]
DD
Multiplexed
driver
Sg1/KS1
6
4
31
2
8
Key[1:4]
3
14
Scan Timing
Generator
G6
SW3
13
OSC
32
12
OSC
33
2
V
R
1
Key4
Display memory
16 bits x 8 words
key data memory
4-bit input latch
4-bit output latch
4
4
SW[1:4]
Winbond Corporate Headquarters
Tel : 886-3-5790666
Fax : 886-3-5796139
Details are subject to change without notice.
Apr. 1999
LED[1:4]
VDD
Taipei Sales Office
Tel : 886-2-7190505
Fax : 886-2-7197502
All
VSS
VEE
Winbond Electronics North America Corp.
Tel : 1-408-9436666
Fax : 1-408-9436668
trademarks are property of their respective holders.
G5
SW1
SW2
Key3
Serial
interface
CLK
44
Functional Block
Pin Configuration
Winbond Electronics H.K. Ltd.
Tel : 852-27513100
Fax : 852-27552064