13.3.2.1.4 Watchdog Timer (WDT) Reset
The Watchdog Timer (WDT) is a system function that monitors the program's operation. A Watchdog Reset will be issued if the software doesn't handle the WDT according to the programmed time-out period. Find more details in the WDT - Watchdog Timer section.
Note: The time tWDTR is approximately 150 ns.