20.6.5 Digital Frequency Locked Loop (DFLL48M) Operation

The DFLL48M can operate in both open-loop mode and closed-loop mode. In closed-loop mode, a low-frequency clock with high accuracy should be used as the DFLL48M reference clock to get high accuracy on the output clock (CLK_DFLL48M).

The DFLL48M's output can be used as a source for the generic clock generators (GCLK.GENCTRLn.SRC = DFLL).