W742C813 Datasheet, PDF (7/56 Pages) Winbond – 4 BIT MICROCONTROLLER

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