W741C260 Datasheet, PDF (4/92 Pages) Winbond – 4-BIT MICROCONTROLLER

W741C260
PIN DESCRIPTION
SYMBOL
XIN1
XOUT1
XIN2
XOUT2
RA0−RA3
RB0−RB3
RC0−RC3
RD0−RD3
RE0−RE3
MFP
RES
SEG0−SEG31
COM0−COM3
I/O
FUNCTION
I Input pin for oscillator.
Connected to crystal or resistor to generate system clock by code option.
O Output pin for oscillator.
Connected to crystal or resistor to generate system clock by code option.
I Input pin for sub-oscillator. Connected to a 32.768 KHz crystal.
O Output pin for sub-oscillator. Connected to a 32.768 KHz crystal.
I/O Input/Output port.
Input/output mode specified by port mode 1 register (PM1).
I/O Input/Output port.
Input/output mode specified by port mode 2 register (PM2).
I 4-bit port for input only.
Each pin has an independent interrupt capability.
I 4-bit port for input only.
O Output port only.
This port provides high sink current to drive LEDs.
Output pin only.
O This pin can output modulating or nonmodulating frequency, or Timer 1
clock output specified by mode register 1 (MR1).
I System reset pin with pull-high resistor.
O LCD segment output pins.
Can also be used as DC output ports specified by code option.
O LCD common signal output pins.
DH1, DH2
VDD1, VDD2,
VDD3
VDD
VSS
COM0
COM1
COM2
COM3
Static
Used
Not Used
Not Used
Not Used
1/2 Duty
Used
Used
Not Used
Not Used
1/3 Duty
Used
Used
Used
Not Used
1/4 Duty
Used
Used
Used
Used
The LCD alternating frequency can be selected by code option.
I Connection terminals for voltage doubler (halver) capacitor.
Positive (+) supply voltage terminal.
I _{Refer to Functional Description.}
I Positive power supply (+).
I Negative power supply (-).
-4-