l引言在闭路电视监视系统中，采用单片机技术作为其主要控制方式，已得到广泛的应用。近几年来，随着单片机应用技术的发展，推出一系列新产品。我们选用其中AThgffi051应用在视频矩阵切换器的研制项目中，得到满意的效果。2系统功能特点1）32路机频图像信号输入，并可扩展；对 l Introduction In the closed-circuit television monitoring system, the use of single-chip technology as its main control method, has been widely used. In recent years, with the development of MCU application technology, a series of new products are introduced. We choose which AThgffi051 application in the video matrix switcher development project, get satisfactory results. 2 system features 1) 32 road machine frequency image signal input, and can be extended;