摘要
文章基于CD4060芯片的单片机应用系统硬件看门狗技术,给出了实用的硬件电路图并详细地分析了其工作原理,讨论了喂狗指令插入原理和喂狗指令插入位置的问题,对上电复位和看门狗信号复位两种不同情况下,应用软件的不同处理过程,也进行了详细的论述。实践证明,本文所介绍的硬件看门狗技术对提高单片机应用系统的抗干扰能力是行之有效的,已成功地使用在多个实际的MCU应用系统中,保证了系统的可靠运行。
Hardware WDT technique of MCU application system is discussed based on CD4060, the practical hardware circuit diagram is given and its working principle is analyzed in detail, clearing WDT instruction＇s installing principle and position are discussed as well. On the two conditions of up power resetting and WDT signal resetting, the different disposal process of the user＇s program is introduced in detail. Practices prove that the hardware WDT technique discussed in this paper is effective for the ability of anti-interference for MCU system. It is successfully applied to some MCU systems, and it also can guarantee the system running reliably.
出处
《电子测量技术》
2007年第7期172-174,195,共4页
Electronic Measurement Technology
基金
湖南省自然科学基金(05JJ40112)资助
