https://devzone.nordicsemi.com/f/nordic-q-a/46482/sleep-modeIn working through understanding how sleep works with the SDK I ran into the following note for sd_app_evt_wait() The application must ensure that the pended flag is cleared using sd_nvic_ClearPendingIRQ in order to sleep using this function. This isen-USTelligent Community 13Thu, 02 May 2019 14:30:28 GMThttps://devzone.nordicsemi.com/thread/184953?ContentTypeID=1Thu, 02 May 2019 14:30:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:be77488a-0e02-4047-bbe5-e5ea7e6d5a22Sigurd[quote userid="16495" url="~/f/nordic-q-a/46482/sleep-mode"]Do I need to add calls to&nbsp;<span>sd_nvic_ClearPendingIRQ</span>[/quote] <p>Generally, you don&rsquo;t need to do that. You will not get pending interrupt on a peripheral as long as intenset is not enabled. We are doing it for the FPU, yes, but that is because it&rsquo;s behavior is a little different from the other peripherals. (The FPU interrupt will always set the pending flag (even if the&nbsp;interrupt is not enabled), you can read about this at the bottom of <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v11.0.0/index.html?cp=5_4_10_0">this page</a>).</p><div style="clear:both;"></div>