https://devzone.nordicsemi.com/f/nordic-q-a/127226/nrf54lm20a-lfxo-datasheet-intcap-formula-vs-nrf_oscillators_lfxo_cap_calculate-macro-give-very-different-resultsHi, I’m working on nRF54LM20A and trying to configure the internal capacitors for the 32.768 kHz crystal (LFXO) using the factory trim values in FICR. According to the nRF54LM20A Product Specification, the LFXO internal capacitor value (INTCAP) shoulden-USTelligent Community 13Thu, 05 Mar 2026 09:33:49 GMThttps://devzone.nordicsemi.com/thread/562623?ContentTypeID=1Thu, 05 Mar 2026 09:33:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:36d05a36-797c-413b-b23c-39c3bda83af4strongman<p><span>Thank you for investigating this and for reporting the issue internally. It&#39;s good to know that the calculation in the startup file is the correct one.&nbsp;</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/562339?ContentTypeID=1Mon, 02 Mar 2026 14:57:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:967c3008-f6dc-47bf-aa23-27ff84767c69Vidar Berg<p>Hello,</p> <p>I was not aware of the NRF_OSCILLATORS_LFXO_CAP_CALCULATE() macro. In the SDK, we calculate the load capacitance from the startup file here without this macro:&nbsp;<a href="https://github.com/nrfconnect/sdk-zephyr/blob/098b02839c00dd78f2bd87f4dc00a63f6242f853/soc/nordic/nrf54l/soc.c#L38">https://github.com/nrfconnect/sdk-zephyr/blob/098b02839c00dd78f2bd87f4dc00a63f6242f853/soc/nordic/nrf54l/soc.c#L38</a>. I will have to investigate this and get back to you.</p> <p>Best regards,</p> <p>Vidar&nbsp;</p> <p>EDIT:&nbsp;<strong></strong>the calculation performed in the startup file linked above calculates shall be the correct one. I have reported the issue with the&nbsp;<span>NRF_OSCILLATORS_LFXO_CAP_CALCULATE macro internally.</span></p><div style="clear:both;"></div>