器件名称: W66880
功能描述: VFD CONTROLLER/DRIVER
文件大小: 21.95KB 共1页
简 介:W66880CF
VFD CONTROLLER/DRIVER
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. 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
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
APPLICATIONS
VFD display driving and panel function control
Functional Block Pin Configuration
LED1 LED2 LED3 LED4 OSC V DD V SS G2 G1 G3
35
44
43
42
41
40
39
38
37
36
Din Dout CLK STB
2
34
G4
SW1 SW2
1 2 3 4 5 6 7 8 9
33 32 31 30
G5 G6 Sg16/G7 Sg15/G8 Sg14 Sg13 VEE Sg12 Sg11 Sg10 Sg9
Serial interface
Display memory 16 bits x 8 words
SW3
16
14
Segment Driver
SW4
Sg[1:14]
Dout Din VSS
W66880
29 28 27 26 25 24 23
VDD
R Data switch OSC Scan Timing Generator
8 6 2 2
CLK STB
Key1 10 Key2 11
12 13 14 15 16 17 18 19 20 21 22
OSC
Sg2/KS2
Sg3/KS3
Sg4/KS4
Sg5/KS5
Sg6/KS6
Multiplexed driver
Sg1/KS1
Sg[15:16] /G[8:7]
Key3
Key4
DD
Sg7
Key[1:4]
4
key data memory……
