https://devzone.nordicsemi.com/f/nordic-q-a/74933/nrf52833-hfclk-controller-ppm-frequency-offsetDear Nordic: so I want to know In nRF52 serials chips, How much HFCLK CONTROLLER ppm is the frequency offset distribution and production FT control range? Do you have any data for showing us? Thanks a lot~en-USTelligent Community 13Tue, 11 May 2021 01:34:01 GMThttps://devzone.nordicsemi.com/thread/309095?ContentTypeID=1Tue, 11 May 2021 01:34:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2a9306f2-ebe7-4398-acf4-4de56e7c3178Wwing<p>Hi,Kenneth:</p> <p>Thanks a lot.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/308987?ContentTypeID=1Mon, 10 May 2021 13:05:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:971fc70d-1477-44cb-a352-29e433ab51ddKenneth<p>When MCU is running on the internal RC HFCLK, then you can find tolerance here:<br /><a href="https://infocenter.nordicsemi.com/topic/ps_nrf52833/clock.html#unique_2077664274">https://infocenter.nordicsemi.com/topic/ps_nrf52833/clock.html#unique_2077664274</a></p> <p>However, for BLE and other radio protocols, then you need an accurate external 32MHz crystal, then the tolerance will depend on the crystal manufacturer you are using. We specify the max tolerance for the external crystal here:<br /><a href="https://infocenter.nordicsemi.com/topic/ps_nrf52833/clock.html#unique_426346948">https://infocenter.nordicsemi.com/topic/ps_nrf52833/clock.html#unique_426346948</a>&nbsp;</p><div style="clear:both;"></div>