W742C813 データシートの表示（PDF） - Winbond

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W742C813

4-BIT MICROCONTROLLER

Winbond 

W742E/C813

Pin Description, continued

SYMBOL

I/O

FUNCTION

RES

VPP

I System reset pin with internal pull-high resistor.

VPP: supply programming voltage, without internal pull-high

resistor for electrical erasable EPROM type for avoiding high

voltage programming damage

SEG0−SEG31

O LCD segment output pins.

COM0−COM15

O LCD common signal output pins.

The LCD alternating frequency can be selected by code option.

SEG32−SEG39

(K00−K03, K10−K13)

LCD segment output pins or DC N-MOS open drain output pins

O selected by code option.

CP, CN

I Connection terminals for LCD voltage doubler capacitor (0.1 µF),

tuning the capacitor value can reduce the LCD driving current.

VLCD1

I LCD supply voltage input or connect capacitor (0.1 µF) to ground

when enable internal pump LCD voltage

VDD

I Positive power supply (+).

VSS

I Negative power supply (-).

Publication Release Date: December 2000

-7-

Revision A1

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