W541L260 Datasheet, PDF (6/11 Pages) Winbond – 4-BIT MICROCONTROLLER

W541L260
5. 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
Input pin for oscillator.
I Connected to crystal or resistor to generate system clock by code option.
External 10~20pF capacitor uses to get accurate freq in crystal mode.
Output pin for oscillator.
O _{Connected to crystal or resistor to generate system clock by code option.}
20pF capacitor is built in internal for crystal mode.
I
Input pin for sub-oscillator. Connected to a 32.768 KHz crystal. External
10~20pF capacitor uses to get accurate freq in crystal mode.
O
Output pin for sub-oscillator. Connected to a 32.768 KHz crystal. 20pF
capacitor is built in internal for crystal mode.
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).
4-bit port for input only.
I Each pin has an independent interrupt capability. And build-in schmitt
trigger.
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.
LCD common signal output pins.
Static
1/2 Duty 1/3 Duty 1/4 Duty
COM0 Used
Used
Used
Used
O
COM1 Not Used Used
Used
Used
COM2 Not Used Not Used Used
Used
COM3 Not Used Not Used Not Used Used
DH1, DH2
VDD1, VDD2
VDD3
VDD
VSS
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 (-).
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