13.3.2.1.5 Watchdog Reset

The Watchdog Timer (WDT) is a system function for monitoring correct program operation. If the WDT is not reset from software according to the programmed time-out period, a Watchdog Reset will be issued. See the WDT documentation for further details.

All logic is reset on WDT Reset, except UPDI and BOD configuration. All fuses are reloaded after the Reset is released.