Watchdog circuit capable of configuring reset duration and timing duration

A watchdog circuit capable of configuring reset duration and timing duration comprises: a watchdog chip, a binary counter chip, an RC charging and discharging circuit, a triode unit, a PMOSS tube unitand a power supply unit, the watchdog chip is connected with the binary counter chip, the binary counter chip is connected with the RC charging and discharging circuit, and the power supply unit is connected with the RC charging and discharging circuit. The triode unit is connected with the binary counter chip, the PMOSS tube unit is connected with the triode unit, and the power supply unit is respectively connected with the watchdog chip, the binary counter chip, the RC charging and discharging circuit, the triode unit and the PMOSS tube unit. Compared with the prior art, the watchdog systemhas the advantages that the timing duration and the reset market duration can be set, the watchdog system is matched with the monitored single-chip microcomputer system, reset/restart of the single-chip microcomputer system i