Abstract:Several ways are listed about micro-controller's key's processing in this paper. It mainly discusses how to eliminate the mechanical button response and optimize the response time in programming. It proposes a new ADC filter method of the micro-controller, emphasizing upon the processing reality. It uses interrupt sampling and valve value smooth filter in programming to eliminate key's vibration and expand the keyboard. The experiments prove that this method enhances the microcontroller optimal resources and improves the performance.