W66880CF Datasheet, PDF (1/1 Pages) Winbond – VFD CONTROLLER/DRIVER

W66880CF
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
Functional Block
Pin Configuration
VFD CONTROLLER/DRIVER
• 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
Din
Dout
CLK
STB
VDD
R
OSC
Serial
interface
OSC
Key[1:4]
4
Display memory
16 bits x 8 words
Scan Timing
Generator
key data memory
16
14
2
Data
switch
2
2
8
6
Segment
Driver ^Sg[1:14]
Multi-
plexed
driver
Sg[15:16]
/G[8:7]
SW1 1
SW2 2
SW3 3
SW4 4
Dout 5
Din 6
V_SS 7
CLK ⁸
STB 9
Key1 10
Key2 11
W66880
33 G5
32 G6
31 Sg16/G7
30 Sg15/G8
29 Sg14
28 _Sg13
27 V_EE
26 Sg12
25 Sg11
24 Sg10
23 Sg9
4-bit input latch
4
SW[1:4]
4-bit output latch
4
LED[1:4]
Grid _G[1:6]
driver
VDD VSS
VEE
Winbond Corporate Headquarters
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Taipei Sales Office
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Winbond Electronics North America Corp.
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Details are subject to change without notice. All trademarks are property of their respective holders.
Apr. 1999
Winbond Electronics H.K. Ltd.
Tel : [phone]
Fax : [phone]