MC81F4x16
5. PIN DESCRIPTION
Pin Names I/O
Function
Shared with
R00
R01
R02
SXin/EXT10
SXout/EXT11
AN0/EC0/EXT0
AN1/T0O/
PWM0O/EXT1
R03
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.
AN2/EC1/SCK/
EXT2
I/O
R04
R05
R06
AN3/SI/EXT3/
T1O/PWM1O
AN4/EC2/SO/
EXT4
R07
R10
AN5/T2O/EXT5
Vref/EXT6
AN6/PWM2O/
EXT7
R11
R12
R13
AN7/PWM3O/
BUZO/EXT8
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.
AN8/PWM4O/
EXT9
I/O
R14
R15
R16
R17
R20
R21
R22
R23
R24
R25
R26
R27
R30
R31
R32
R33
R34
R35
RxD
TxD
SDA
SCL
AN9
–
–
This port is a 1-bit programmable I/O pin.
Input, Push-pull, or Open-drain output port.
When used as an input port, a Pull-up resistor can be
specified in 1-bit.
–
I/O
–
AN10
AN11
AN12
AN13
AN14
–
This port is a 1-bit programmable I/O pin.
Input, Push-pull, or Open-drain output port.
When used as an input port, a Pull-up resistor can be
specified in 1-bit.
I/O
Xout
Xin
RESETB
October 19, 2009 Ver.1.35
25
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