https://devzone.nordicsemi.com/f/nordic-q-a/61645/vbus-wakeup-behaviour---also-wake-upon-usb-removalHello, During testing we found that whenever in system off mode, the CPU wakes from VBUS rising. As expected. We then do a vibration to notify the user the USB cable was inserted, and go back to system off mode after that. Now when we remove the usben-USTelligent Community 13Thu, 21 May 2020 13:22:57 GMThttps://devzone.nordicsemi.com/thread/251137?ContentTypeID=1Thu, 21 May 2020 13:22:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5e72ba3e-0e28-4e7d-8b50-05dd20c8987dGPL<p>Unfortunately I cannot scope VBUS at the moment. I did place decoupling capacitors according to the reference circuitry in the datasheet. However, I was able to detect if the wake-up was a remove or insert by checking&nbsp;<pre class="ui-code" data-mode="text">NRF_POWER-&gt;USBREGSTATUS &gt; 0</pre></p> <p>This is enough for my application, and I should have checked that before posting this question. My apologies.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/251081?ContentTypeID=1Wed, 20 May 2020 20:55:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:17201352-7163-422d-aee5-14fba9edc7c2Turbo J<p>Try scoping VBus / VDDH on the NRF side.</p> <p>Just yanking the plug can cause voltage fluctuations - there is intentionally not much capacity on VBUS.</p> <p>It may look a bit like this: &macr;&macr;\/\/\/\___ , and thoses spikes may be well within VBus,Detect range, triggering RESET.</p><div style="clear:both;"></div>