Abstract: This paper designs an asynchronous Motor control system interface based on FPGA. The author designs sampling electrocircuit

keyboard and display interface circuit and encoder in this paper. FPGA functions in paralleling and doesn’t take up time of CPU. Then the performance of the control system is improved largely. The hardware system’s performance is improved by adopting FPGA or combining FPGA and DSP. FPGA can function using program of VHDL. In result

the hardware design feasibility is proved by experiment.