MC81F420420 April 24, 2012 Ver.1.415. PIN DESCRIPTIONPin Names I/O Pin Description AlternativeFunctionsR00 EXT10R01 EXT11R02 AN0/EC0/EXT0R03 AN1/T0O/PWM0O/EXT1R04 AN2/EC1/SCK/EXT2R05 AN3/SI/EXT3/T1O/PWM1OR06 AN4/EC2/SO/EXT4R07I/O 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 bespecified in 1-bit.AN5/T2O/EXT5R10 Vref/EXT6R11 AN6/PWM2O/EXT7R12 AN7/PWM3O/BUZO/EXT8R13 AN8/EXT9R14I/O 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 bespecified in 1-bit.–R31 AN14R32I/O 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 resistorcan be specified in 1-bit.–R33 XoutR34 XinR35I/O 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 bespecified in 1-bit. RESETBEXT0 I/O External interrupt input R02/AN0/EC0EXT1 I/O External interrupt input/Timer 0 capture input R03/AN1/T0O/PWM0OEXT2 I/O External interrupt input R04/AN2/SCK/EC1EXT3 I/O External interrupt input/Timer 1 capture input R05/AN3/SI/T1O/PWM1OEXT4 I/O External interrupt input R06/AN4/SO/EC2
