32.768 kHz synthesized from HFCLK (LFSYNT)

The LFCLK can be synthesized from the HFCLK clock source.

LFSYNTH depends on the HFCLK to run. The accuracy of the LFCLK clock with the LFSYNTH as a source assumes the accuracy of the HFCLK. If high accuracy is required, the HFCLK must be generated from the HFXO.

Using the LFSYNT clock removes the requirement for an external 32.768 kHz crystal, but increases average power consumption as the HFCLK will need to be requested in the system.