Winbond Electronics W666880CF Datasheet
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 (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
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
4443424140393837363534
1
2
3
4
5
6
7
8
9
10
11
33
32
31
30
29
28
27
26
25
24
23
1213141516171819202122
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
VDD
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
Multiplexed
driver
Grid
driver
4-bit input latch 4-bit output latch
4 4
VDD VEEVSS
Sg[15:16]
/G[8:7]
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