◆ NRF_RADIO_HFCLK_CFG

#include <nrf_soc.h>

Radio timeslot high frequency clock source configuration.

Enumerator

NRF_RADIO_HFCLK_CFG_XTAL_GUARANTEED

The SoftDevice will guarantee that the high frequency clock source is the external crystal for the whole duration of the timeslot. This should be the preferred option for events that use the radio or require high timing accuracy.

Note: The SoftDevice will automatically turn on and off the external crystal, at the beginning and end of the timeslot, respectively. The crystal may also intentionally be left running after the timeslot, in cases where it is needed by the SoftDevice shortly after the end of the timeslot.

NRF_RADIO_HFCLK_CFG_NO_GUARANTEE

This configuration allows for earlier and tighter scheduling of timeslots. The RC oscillator may be the clock source in part or for the whole duration of the timeslot. The RC oscillator's accuracy must therefore be taken into consideration.

Note: If the application will use the radio peripheral in timeslots with this configuration, it must make sure that the crystal is running and stable before starting the radio.