Should the MCU program, for some reason, run out of control or stop running altogether, the electronic device may behave erratically, which in the worst case could cause damage or an accident. This makes safeguarding normal MCU operation essential. ![]() Integrated into a wide variety of electronic devices, MCUs come pre-loaded with program software whose commands are used to control electronic devices. It acts as a “watchdog” watching over MCU operation.Ī microcontroller (MCU) is a compact processor for controlling electronic devices. What is a watchdog timerĪ watchdog timer (WDT) is a timer that monitors microcontroller (MCU) programs to see if they are out of control or have stopped operating.
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