https://devzone.nordicsemi.com/f/nordic-q-a/67917/32mhz-crystal-frequency-calibrationDear HW engineer, I have ordered a few custom boards with nRF52820. As recommended by the datasheet, I have used 12pF load capacitors for both HF (32MHz) and LF (32kHz) oscillators. However, the boards developed in past with nRF52811 accept 12.5pF ofen-USTelligent Community 13Tue, 03 Nov 2020 14:21:51 GMThttps://devzone.nordicsemi.com/thread/278302?ContentTypeID=1Tue, 03 Nov 2020 14:21:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:41bb1066-3329-4ed6-ae60-994a30338adfketiljo<p>If you&#39;re using a relatively accurate crystal, you should be fine by calculating the cap value as Ccap = CL *2 - Cpin, where Cpin = 4 pF.</p> <p>The frequency tolerance for BLE is +/-40 ppm.</p><div style="clear:both;"></div>