Watchdog

The CPU module integrates an external watchdog chip CAT823, and the dog signal is GPIO3_8. When a WDI signal is high impedance, the watchdog function is disabled, and when a WDI signal is high or low, the watchdog chip will enter working state. If the WDI level transition does not occur within 1.12 seconds, the watchdog chip will generate a reset signal to reset the MCC-AM335X-Y.