The mk68f16 is a 32-bit microcontroller chip, and its pin function can be viewed in the chip's data manual. Due to the length of the data book, only some common pin functions are provided here:
Reset: Reset pin, which is used to reset the microcontroller to its initial state.
VCC: Power pin used to power the microcontroller.
GND: Ground pin that connects the microcontroller to the ground wire.
AD0~AD7: analog input pins, used to receive analog signal input.
PD0~PD7: Programmable digital input\/output pins that can be programmed to be either input or output.
P0~P3: Programmable digital input\/output pins that can be programmed to be input or output.
Timer0\/1\/2: Timer pin, used to connect the timer circuit.
UART0\/1: serial communication pin used to connect serial communication devices.
SPI0\/1: Serial Peripheral interface (SPI) pin for connecting SPI communication devices.
I2C0\/1: I2C bus interface pin, used to connect the I2C bus communication device.
These are just some of the common pin functions of the mk68f16, which can be viewed in the data sheet.