Digital circuit fault diagnosis interface technology based on VXI

This paper explains the concept of interface circuit design and VXI bus technology, discusses in detail the development process of general interface adapter in the digital circuit fault diagnosis system based on a project of research on automatic detecting and interface technology in missile launch and control system completed by author recently, presents a method of solving the problem about load matching and interface matching, realizes the function of identification by using SR192 which is the digital IO module of VXI to read and write on the memory of interface circuit and to control chip selection, and scanning technology is used because in practical application the transferring in interface circuit is direct connection to meets the demand of self detection .