看门狗复位对微机控制系统的影响与对策

Effect of WDT-Reset on Microcomputer Control System and Its Solving Measure

看门狗复位技术是单片机应用系统抗干扰设计的一个主要措施，但单片机复位时其内外Ｉ／Ｏ的突变会对控制过程产生严重影响。本文分析了看门狗复位对控制系统的影响，提出了解决突变问题的几种措施，这些措施曾在多个产品的实践中证明是有效的。

Reset of microcomputer by watch-dog-timer is a major measure of anti-interference in microcomputer control system, but the sudden change of I/O signals caused by the reset can affect the process control seriously. In this paper, the effect of WDT-reset on control system is analyzed, and some anti-interference measures, which have been proved to be effective by practical applications, are presented.