https://devzone.nordicsemi.com/f/nordic-q-a/4912/51822-hfclock-frequency-problemhi, i am working on a project which needs a relatively accurate high frquency clock. when i ran my program without softdevice, the HF clock&#39;s accurency could fullfil our requirement. but when softdevice (s110 v7.0.0)is used, the HF clock slows down aen-USTelligent Community 13Fri, 02 Jan 2015 21:20:27 GMThttps://devzone.nordicsemi.com/thread/17350?ContentTypeID=1Fri, 02 Jan 2015 21:20:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:18cdf901-95ba-41fc-8f65-6db4d433df13Asbj&#248;rn<p>What do you mean that HF slows down? Is it changing it frequency or are you seeing some changes in the timing? With the softdevice enabled you might see some latency due to the softdevice holding up the application. Is this what&#39;s causing your issue? <a href="https://www.nordicsemi.com/eng/nordic/download_resource/20338/13/54527714">Please have a look in the Softdevice specification.</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/17347?ContentTypeID=1Fri, 26 Dec 2014 03:33:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:df411410-38e7-4939-9151-7dda74d9cac5DevineFelix<p>there is only one 16MHz external crystal.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/17348?ContentTypeID=1Tue, 23 Dec 2014 09:01:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:52760874-c56e-4a57-9cb1-5f67b47ffd54FormerMember<p>Which external 16 MHz crystal do you use? The fact that the HF clock slows down, does it case any problem?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/17349?ContentTypeID=1Tue, 23 Dec 2014 08:32:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cf37cda7-4a5e-4c99-98a2-3e22c5b686b5Locky<p>Are you using an external 32.768kHz crystal, RC, or synthesized? Are you sure to specify the correct HF crystal when you enable the softdevice?</p><div style="clear:both;"></div>