摘要： 看门狗定时器（WDT）已成为当前MCU系统中不可缺少的一部分。但随着MCU系统功能的增加，对于传统的WDT，由于其不能对异步驱动时钟进行处理或不能在低功耗模式下（系统时钟及外设时钟停止）运行，已经不适用于部分功能复杂的MCU。设计的WDT定时器对异步输入时钟及其衍生信号进行了优化，从而使其可由同步或异步时钟进行驱动，并能在低功耗模式下运行。

中图分类号：TN402 文献标志码：A DOI: 10.16157/j.issn.0258-7998.245067
中文引用格式： 梁浩，俞小平，陈士金. 可由异步时钟驱动的高可靠性低功耗WDT[J]. 电子技术应用，2024，50(10)：18-23.
英文引用格式： Liang Hao，Yu Xiaoping，Chen Shijin. High reliability WDT driven by asynchronous clock and work in low power mode[J]. Application of Electronic Technique，2024，50(10)：18-23.

High reliability WDT driven by asynchronous clock and work in low power mode

Abstract： WDT counter has become a necessary part in modern MCU system. But with the development of the function of MCU system, the traditional WDT counters that cannot process asynchronous clock and cannot work during low power mode（suspend system clock or peripheral clock）, are not suitable for MCU with various function. The WDT counter that is described in the passage optimized asynchronous clock and signal generated from it, which makes the WDT could be driven by asynchronous or synchronous clock and work during low power mode.

Key words : WDT counter；asynchronous circuit；low-power mode