13.11.1 Enabling the FRC

The FRC oscillator is powered when OSCCON.NOSC[3:0] = 4’b0000 or a Fail-safe clock monitor is enabled and a clock fail is detected, forcing a switch to FRC. It is also enabled whenever it gets requested by: ADC requesting for FRC, Configuring an SPLL2 source as FRC, PMU Controller requesting for FRC, Flash Controller requesting for FRC, Configuring LPCLK (32 KHz) source to FRC.

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