Abstract :
AT89C51 single-chip micro controller is used as the core and MAX440 based video matrix switching system is designed, which is divided into selection input module, control processing module and video switching. From whole to part, it has a detailed introduction of the selection of power supply, input of the system, processing of single chip micro controller, MAX440 application and video line selection of video output. The circuit connection diagram and instructions are also given. At the same time, program of corresponding modules are given.
