https://devzone.nordicsemi.com/f/nordic-q-a/102200/nrf52840-usb-supply-is-given-while-vdd-and-vddh-is-offWhat happens if we power up VBUS but do not power up VDD and VDDH in nRF52840? Please refer to the image of our schematic below, which illustrates how we have utilized the MDBT50Q-1MV2 module.en-USTelligent Community 13Thu, 27 Jul 2023 12:36:29 GMThttps://devzone.nordicsemi.com/thread/438516?ContentTypeID=1Thu, 27 Jul 2023 12:36:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8e620d84-9cba-499c-aeb5-ba4927837ba7Priyanka<p>It should work fine with just VBUS powered, but we cannot guarantee it completely.</p> <p>-Priyanka</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/438288?ContentTypeID=1Wed, 26 Jul 2023 13:00:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1b06a13f-a7b5-47af-bb75-eb8281825010Vikas Bhatt<p><span>Will connecting it as shown in the previously shared image damage the nRF52840 if we power up VBUS but do not power up VDD and VDDH in nRF52840?</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/438282?ContentTypeID=1Wed, 26 Jul 2023 12:55:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4b5a8bf4-be84-4c60-8b05-26d873b1c533Vikas Bhatt<p><span>Will connecting it as shown in the previously shared image damage the nRF52840?</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/438265?ContentTypeID=1Wed, 26 Jul 2023 12:23:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7a845875-8417-415c-ad2f-48a2ae597fcePriyanka<p>Hi Vikas,</p> <p>You need the VBUS and VDDH or VDD supply for the proper USB peripheral operation:</p> <p><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/5710.pastedimage1690374190628v1.png" alt=" " /></p> <p>Best Regards,</p> <p>Priyanka</p><div style="clear:both;"></div>