4.2.2.3 LFINTOSC

The Low-Frequency Internal Oscillator (LFINTOSC) is a factory-calibrated 31 kHz internal clock source.

The LFINTOSC is the frequency for the Power-up Timer (PWRT), Windowed Watchdog Timer (WWDT) and Fail-Safe Clock Monitor (FSCM).

The LFINTOSC is enabled through one of the following methods:

• Programming the RSTOSC[2:0] bits of Configuration Word 1 to enable LFINTOSC.
• Write to the NOSC[2:0] bits during run-time.