https://devzone.nordicsemi.com/f/nordic-q-a/58269/saadc-the-samplerate-timer-mode-cannot-be-combined-with-scan-mode-and-only-one-channel-can-be-enabled-in-this-mode-whyit says &quot;The SAMPLERATE timer mode cannot be combined with SCAN mode, and only one channel can be enabled in this mode.&quot; , simply why ? When we set scan mode , and when we call sample task , is adc using internal timer to scan each channel ? is thisen-USTelligent Community 13Tue, 25 Feb 2020 08:11:37 GMThttps://devzone.nordicsemi.com/thread/236149?ContentTypeID=1Tue, 25 Feb 2020 08:11:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:de468b97-4dbe-4157-ae90-ac5b2d962e56haakonsh<p><span>&quot;it says &quot;The SAMPLERATE timer mode cannot be combined with SCAN mode, and only one channel can be</span><br /><span>enabled in this mode.&quot;, simply why ? &quot;&nbsp;<br /><br /></span>I don&#39;t know, it&#39;s an HW limitation on a feature that is never used. We only exposed the functionality on the latest nRF5 SDK 16.0. I&#39;m guessing it was a bug that never got high enough priority to be fixed.&nbsp;<br /><br />&quot;<span>When we set scan mode, and when we call sample task , is adc using internal timer to scan each channel ?&quot;<br /></span>No, an internal state-machine handles that.&nbsp;<br /><br /><br /></p> <p><span>&nbsp;</span></p><div style="clear:both;"></div>