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| W66880CF VFD CONTROLLER/DRIVER GENERAL DESCRIPTION The W66880CF is a VFD (Vacuum Fluorescent Display) controller/driver. It is pin-to-pin compatible with NEC uPD16312 and PTC6312 and 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 PQFP APPLICATIONS FEATURES * Flexible display modes (4 to 8 grids) - 4 grids x 16 segments to 8 grids x 14 segments * 6 x 4 matrix key scanning * 8 steps dimming circuit * VFD display driving and panel function control * Applicable to FUTABA Standardized VFD Panel for VCD Player (Part#: 6-BT-265GK and 6-BT-267GK, both 6 grids x 16 segments) Functional Block Pin Configuration LED1 LED2 LED3 LED4 OSC VDD VSS G2 CLK STB Serial interface Display memory 16 bits x 8 words 44 43 42 41 40 39 38 37 G1 36 35 G3 16 2 14 Segment Driver Sg[1:14] SW1 SW2 1 2 3 4 5 6 7 8 9 33 32 31 30 34 G4 Din Dout G5 G6 Sg16/G7 Sg15/G8 Sg14 Sg13 VEE Sg12 Sg11 Sg10 Sg9 VDD R Data switch OSC Scan Timing Generator 8 6 2 2 SW3 SW4 Dout OSC Din VSS W66880 29 28 27 26 25 24 23 Multiplexed driver Sg[15:16] /G[8:7] CLK STB Key1 10 Key2 11 Key[1:4] 4 key data memory 12 13 14 15 16 17 18 19 20 21 Key3 Key4 DD Sg1/KS1 Sg2/KS2 Sg3/KS3 Sg4/KS4 Sg5/KS5 Sg6/KS6 Sg7 Grid driver 4-bit input latch 4-bit output latch G[1:6] 4 4 SW[1:4] LED[1:4] VDD VSS VEE 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 Apr. 1999 Details are subject to change without notice. All trademarks are property of their respective holders. Sg8 V 22 |
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