https://devzone.nordicsemi.com/f/nordic-q-a/120199/detect-and-flash-a-custom-board-with-a-nrf5340-chip-on-itWhen I get a custom board, how do I detect and flash it? I have three options on the board: I have a USB cable with: GND D+ D- +5V OR can configure the usb cable connection for: GND SWCLK SWDIO +5V OR pins directly on theen-USTelligent Community 13Fri, 28 Mar 2025 08:54:18 GMThttps://devzone.nordicsemi.com/thread/529459?ContentTypeID=1Fri, 28 Mar 2025 08:54:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f3101833-c819-4be0-9edc-e964e9e16653Priyanka<p>Hi Leo,</p> <p>It is always recommended to use the SWD connections when programming a custom board. The Reset pin is not required. So I would say this option:</p> [quote user=""]<ul><li>GND</li> <li>SWCLK</li> <li>SWDIO</li> <li>+5V</li></ul>[/quote] <p>You can take a look at the two options mentioned in this&nbsp;link, for programming your custom board :<a href="https://docs.nordicsemi.com/bundle/ug_nrf5340_dk/page/UG/dk/hw_debug_out_segger53.html">https://docs.nordicsemi.com/bundle/ug_nrf5340_dk/page/UG/dk/hw_debug_out_segger53.html</a>&nbsp;</p> <p>Regards,</p> <p>Priyanka</p><div style="clear:both;"></div>