MC81F4104
5. PIN DESCRIPTION
Alternative
Functions
Pin Names I/O
Pin Description
R00
R01
R02
R03
Xin/AN0
Xout/AN1
AN2
RESETB
This port is a 1-bit programmable I/O pin.
Schmitt trigger input, Push-pull, or Open-drain output port.
When used as an input port, a Pull-up resistor can be
specified in 1-bit.
R04
PWM2O/T2O/
AN4/EXT0
I/O
R05
R06
AN5
EC2/AN6/
EXT1
R07
EC3/Vref/AN7/
EXT2
EXT0
R04/PWM2O/
T2O/AN4
I/O External interrupt input/Timer 2 capture input
I/O External interrupt input
EXT1
EXT2
R06/EC2/AN6/
R07/EC3/Vref/
AN7
I/O External interrupt input/Timer 3 capture input
T2O
EC2
R04/PWM2O/
AN4/EXT0
I/O Timer 2 clock output
I/O Timer 2 event count input
I/O PWM 2 clock output
R06/AN6/
EXT1
PWM2O
EC3
R04/T2O/
AN4/EXT0
R07/Vref/AN7/
EXT2
I/O Timer 3 event count input
AN0
AN1
AN2
AN4
R00/Xin
R01/Xout
R02
R04/PWM2O/
T2O/EXT0
I/O ADC input pins
AN5
AN6
AN7
R05
R06/EC2/EXT1
R07/EC3/Vref/
EXT2
RESETB
XIN
I
System reset pin
R03
R00/AN0,
–
Main oscillator pins
XOUT
VDD
R01/AN1
–
–
–
–
Power input pins
VSS
VREF
R07/AN7/EC3/
EXT2
A/D converter reference voltage
October 19, 2009 Ver.1.35
17
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