The IIC interface based on ATmega8 realizes the applications of PS/2 keyboard/mouse in the system

This paper introduces the PS/2 keyboard/mouse protocol and the transmission characteristics of IIC bus interface, giving the design and hardware circuit for converting the PS/2 keyboard/mouse interface to IIC interface. System analyzes protocols and data, and then transmits the data on the basis of PS/2 keyboard protocol by the ATmega8 microcontroller to the main control system. Thereby data from PS/2 keyboard/mouse is handled and output by the ATmega8 microcontroller to other devices, providing a feasible solution for the next step to achieve the keyboard/mouse interaction with the host.