10.7 Backup Internal Fast RC (BFRC) Oscillator

The oscillator block provides a stable reference clock source for the Fail-Safe Clock Monitor (FSCM). When FSCM is enabled in the FCKSM[1:0] Configuration bits (FOSC[7:6]), it constantly monitors the main clock source against a reference signal from the 8 MHz Backup Internal Fast RC (BFRC) Oscillator. In case of a clock failure, the Fail-Safe Clock Monitor switches the clock to the BFRC Oscillator, allowing for continued low-speed operation or a safe application shutdown.