The Research of Interface Circuit Module in FPGA Design

The paper introduces the classifications of the internal function module and the designing requirements and the processing methods of peripheric interface circuit in FPGA.The paper analyzes the functions and requirements of those basics in the interface circuit:tristate gate,flip-latch,filter,shift registers,FIFO (first in first out),clock recovery circuit,and proposes the circuit solu- tions of those basics in the interface,input interface,output interface and bidirectional interface.