https://devzone.nordicsemi.com/f/nordic-q-a/20034/pclk16m-and-pclk1m-accuracyWorking with nRF52832 and SD132-v2.0.1 Using Timer 1 at 1MHz (pre-scale 4) and 32bit bitmode CC to trigger events at a pretty wide range (from us to minutes). I&#39;m getting events triggering early and based on scaling from short to long events, iten-USTelligent Community 13Tue, 28 Feb 2017 18:16:54 GMThttps://devzone.nordicsemi.com/thread/77983?ContentTypeID=1Tue, 28 Feb 2017 18:16:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6fad37cd-e597-4c05-84ba-0e1d0fb64417jpelo<p>Petter - thank you for the quick response. Yes, this was the issue hence the tolerance was that of the internal RC. Mistakenly thought this was in my init code.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/77982?ContentTypeID=1Tue, 28 Feb 2017 11:53:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:555e959b-5ee7-4e03-9c58-9f8215efe280Petter Myhre<p>Are you sure that the HFCLK is using HFXO as a source? Are you requesting it with sd_clock_hfclk_request()?</p><div style="clear:both;"></div>