https://devzone.nordicsemi.com/f/nordic-q-a/92197/nrf9160-swd-power-supplyOn a custom board, VDD and VDD_GPIO are independent. Is power supplying VDD1 and VDD2 enough to program nRF9160 through SWD, or do I need to also enable VDD_GPIO to program? Regards,en-USTelligent Community 13Wed, 21 Sep 2022 11:36:58 GMThttps://devzone.nordicsemi.com/thread/387367?ContentTypeID=1Wed, 21 Sep 2022 11:36:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:42faf7af-80aa-4fd8-9ee6-30c955ac07eaSimonr<p>Hi</p> <p>VDD_GPIO also needs to be powered in order to program an nRF9160 through SWD, as the SWD pins are connected to the VDD_GPIO net. For more information on nRF9160 Production Programming, we have an <a href="https://infocenter.nordicsemi.com/pdf/nan_041.pdf">application note</a> on the matter here.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>