Design Testing System Interface Based on CPLD

This paper describes a kind of testing system interface using CPLD as the central control circuit, and discusses the feasibility and advantage of using CPLD in the testing system interface through comparing CPLD with TTL circuit and introducing the powerful function of CPLD in the system. It introduces the application of VHDL in CPLD design. The experiment has proved the circuits using CPLD have many excellence,for example, high integration degree, powerful agility, high reliability and powerful expansibility. The paper gives primary circuit diagram and emulate diagram.