8.2 Watchdog Timer (WDT)
The Watchdog Timer (WDT) is a free running on-chip
RC oscillator which does not require any external
components. This RC oscillator is separate from the
RC oscillator of the OSC1/CLKIN pin. That means that
the WDT will run even if the clock on the OSC1/CLKIN
and OSC2/CLKOUT pins have been stopped, for
example, by execution of a SLEEP instruction. During
normal operation or Sleep, a WDT Reset or Wake-up
Reset generates a device Reset.
