10.4 Windowed Watchdog Timer (WWDT) Reset
The Windowed Watchdog Timer generates a Reset if the firmware does
            not issue a CLRWDT instruction within the
            time-out period or window set. The TO
            and PD bits in the STATUS register and
            the RWDT bit are changed to
            indicate a WDT Reset. The WDTWV bit indicates if the WDT Reset has
            occurred due to a time-out or a window violation.
