https://devzone.nordicsemi.com/f/nordic-q-a/34319/can-i-use-timeslots-without-hfxoI am using the timeslot API for communication but do not have HFXO. If I flash my code with NRF_RADIO_HFCLK_CFG_NO_GUARANTEE, it is perfectly running but no data is received. On the other hand if I flash it with NRF_RADIO_HFCLK_CFG_XTAL_GUARANTEED iten-USTelligent Community 13Tue, 15 May 2018 13:00:11 GMThttps://devzone.nordicsemi.com/thread/132047?ContentTypeID=1Tue, 15 May 2018 13:00:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3413e75c-6722-4a2c-818b-d6cecb522d22bjorn-spockeli<p>The 32Mhz crystal is necessary for the RADIO peripheral of the nRF52840 to function properly, i.e. you cannot transmit any BLE packets without it. The SoftDevice(i.e. the BLE protocol stack) will not function properly without the HFXO.</p> <p>Bjørn&nbsp;&nbsp;</p><div style="clear:both;"></div>