摘要
在单片机应用系统中，系统往往受到外界干扰而影响工作可靠性。“看门狗”是提高系统可靠性的非常重要的技术，因为它既可以由硬件实现，又可以由软件实现。本文主要从硬件看门狗和软件看门狗两个方面阐明其工作原理并给出应用实例。
This paper introduces MCU application system can acquire noises from environment and influnce it＇s reliability during the practical work, the methods to involve noises can from hardware and software o Watch-dog is a importent technology in system reliability, because it can be achived from not only hadware but also software. It priefly explains the watch-dog＇s principle and application through hardware watch-dog and software watch-dog and gives some examples in practical application.
