W742E Datasheet, PDF (10/60 Pages) Winbond – 4 BIT MICROCONTROLLER

W742E/C811
Pin Description, continued
SYMBOL
RE0−RE3
RF0−RF3
P00−P03
P10−P13
Mode
MFP
DTMF
RES
VPP
SEG0−SEG31
COM0−
COM15
SEG32−SEG39
(K00−K03,
K10−K13)
I/O
FUNCTION
O Output port only. CMOS type with high sink current capacity for the
LED application.
I/O Input/Output port.
Input/output mode specified by port mode 6 register (PM6).
P0.0 and P0.1 can be a serial I/O interface selected by SIR register.
P0.0 indicates serial clock, P0.1indicates serial data.
I Input port only.
P1.2 & P1.3 indicates hardware interrupt(/INT0 & /INT1)
P1.3: Mode select for electrical erasable EPROM type
Output pin only, default in low state.
O This pin can output modulating or nonmodulating frequency, or Timer
1 clock output specified by mode register 1 (MR1).
O This pin can output dual-tone multifrequency signal for dialling.
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
O LCD segment output pins.
O LCD common signal output pins.
The LCD alternating frequency can be selected by code option.
LCD segment output pins or DC N-MOS open drain output pins
O selected by code option.
CP, CN
VLCD1
VDD
VSS
I Connection terminals for LCD voltage double capacitor (0.1 µF),
tuning the capacitor value can reduce the LCD driving current.
I LCD supply voltage input or connect capacitor (0.1 µF) to ground
when enable internal pump LCD voltage
I Positive power supply (+).
I Negative power supply (-).
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