Module nrf52::clock

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Clock peripheral driver, nRF52

Based on Phil Levis clock driver for nRF51

HFCLK - High Frequency Clock:

  • 64 MHz internal oscillator (HFINT)
  • 64 MHz crystal oscillator, using 32 MHz external crystal (HFXO)
  • The HFXO must be running to use the RADIO, NFC module or the calibration mechanism associated with the 32.768 kHz RC oscillator.

LFCLK - Low Frequency Clock Source:

  • 32.768 kHz RC oscillator (LFRC)
  • 32.768 kHz crystal oscillator (LFXO)
  • 32.768 kHz synthesized from HFCLK (LFSYNT)