https://devzone.nordicsemi.com/f/nordic-q-a/112149/crystal-detection-code-not-triggering-taskHi there, At the moment, we have developed a custom PCB and are having wireless troubles. Our suspicion is that the crystal circuitry must be the issue as there is absolutely no advertising or trace of any sort of signal. Unfortunately, we do noten-USTelligent Community 13Mon, 17 Jun 2024 08:50:37 GMThttps://devzone.nordicsemi.com/thread/489030?ContentTypeID=1Mon, 17 Jun 2024 08:50:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ec31cf1c-9041-400e-97da-d7e36a589236H&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> <p>You should not use the registers directly when the stack is running.</p> <p>I would recommend that you run this specific function in a simpler firmware, ie. without bluetooth capabilities, to see if it actually starts up.</p> <p>&nbsp;</p> <p>If&nbsp;the 32M XO does not start up, I would recommend checking the physical orientation of the xtal as well as the solderings and load caps used.</p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>