nRF5340 Startup with external 1.8V suppliedhttps://devzone.nordicsemi.com/f/nordic-q-a/101300/nrf5340-startup-with-external-1-8v-suppliedHi I am working on an nRF53 design which has strange behaviour on startup/after reset: The Voltage is supplied externally (1.8V) but during/after Reset, the regulator supplies higher voltage back to the rails for some time. If I erase flash completeen-USTelligent Community 13Thu, 29 Jun 2023 22:19:44 GMTRE: nRF5340 Startup with external 1.8V suppliedhttps://devzone.nordicsemi.com/thread/433801?ContentTypeID=1Thu, 29 Jun 2023 22:19:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:77920da8-b1cd-46a8-b92f-a2e9aa01edf3MME77<p>Hi,</p> <p>thanks for looking into this, I finally found the problem with a GPIO connection to 3.3V.</p> <p>Kr M.</p><div style="clear:both;"></div>RE: nRF5340 Startup with external 1.8V suppliedhttps://devzone.nordicsemi.com/thread/433434?ContentTypeID=1Wed, 28 Jun 2023 11:03:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d621bb44-72e9-4be3-9046-bddc3b73926aKenneth<p>Hello,</p> <p>This does not make any sense no. I suggest you just disconnect everything except vdd and ground (and make sure those are connected correct) and try to measure again, I suspect you have a conflict with ground, and somewhere ground is vdd (e.g. through a transistor or similar).</p> <p>Kenneth</p><div style="clear:both;"></div>