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有许多芯片内集成有看门狗电路，这些电路往往是一个双稳触发器和一个定时器的简单结合，而且看门狗的各项参数固定无法改变。图中看门狗电路中的各项参数可以人为控制。且在程序没有启动看门狗时，它不会起作用。 电路利用了集成在一片ＩＣ内的两组电路。其中ＩＣ１Ａ通过 Ｒ?
There are many chip integrated watchdog circuit, these circuits are often a simple combination of a bistable flip-flop and a timer, and the watchdog parameters can not be fixed. Figure watchdog circuit parameters can be artificially controlled. And it does not work when the watchdog is not started by the program. The circuit utilizes two sets of circuits integrated in one IC. Which IC1A through R?