看门狗，中文名称为看门狗，全称是看门狗定时器，L。

代码说明：

watchdog,中文名称叫做“看门狗”，全称watchdog timer,从字面上我们可以知道其实它属于一种定时器。-watchdog, the Chinese name called watchdog , the full name of watchdog timer, literally a matter of fact we can know that it belongs to a timer.