Flashing custom board with nrf52840 chip using the nrf52840dkhttps://devzone.nordicsemi.com/f/nordic-q-a/122144/flashing-custom-board-with-nrf52840-chip-using-the-nrf52840dkHello I designed a custom board and now I have to put the code in the nrf52840 module (from raytac). I have been using the nrf52840dk to write my code and now I want to use the board to flash the other one. This is how I attached my IO pins. Theen-USTelligent Community 13Wed, 11 Jun 2025 14:43:34 GMTRE: Flashing custom board with nrf52840 chip using the nrf52840dkhttps://devzone.nordicsemi.com/thread/538864?ContentTypeID=1Wed, 11 Jun 2025 14:43:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3225278f-4915-46a3-a8df-81ff39f759bdAsbj&#248;rn<p>Any success after following the steps from <a href="https://devzone.nordicsemi.com/members/frogrammer">frogrammer</a>&nbsp;?</p><div style="clear:both;"></div>RE: Flashing custom board with nrf52840 chip using the nrf52840dkhttps://devzone.nordicsemi.com/thread/538629?ContentTypeID=1Tue, 10 Jun 2025 11:13:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:aaef0237-3627-42ad-a8dd-3490464e5beffrogrammer<p>Its optional. what you have connected is all you need.</p><div style="clear:both;"></div>RE: Flashing custom board with nrf52840 chip using the nrf52840dkhttps://devzone.nordicsemi.com/thread/538624?ContentTypeID=1Tue, 10 Jun 2025 10:39:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fea1a66e-1a17-461d-af2a-c092e6a16e57MurielleH<p>Is the SWO necessary? I saw other plans and they didn&#39;t use that one, so I never connected it to my connector. And I cannot access the swo pin because it is beneath the module.</p><div style="clear:both;"></div>RE: Flashing custom board with nrf52840 chip using the nrf52840dkhttps://devzone.nordicsemi.com/thread/538575?ContentTypeID=1Mon, 09 Jun 2025 22:05:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4846654d-c4d4-41a6-9dd3-60a1c7aa8453frogrammer<p><img style="max-height:240px;max-width:320px;" alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/IMG_5F00_1888.jpeg" /></p> <p></p> <p>Combine/Short nRF_VDD + VTG and connect to your custom board VDD&nbsp;</p> <p>SWDIO to SWDIO</p> <p>SWDCLK to SWDCLK</p> <p>SWO to SWO</p> <p>GND to GND</p> <p></p> <p>after this when you open VS Code, under the connected device you will see your DK s Serial number and your custom chips being visible.&nbsp;</p> <p>[ To diasable DKs own nRF52840 chip, VTG and nRF_VDD has to be shorted together this enables external chip to be sensed and programmed through SWD. ]</p> <p></p> <p>This is the way to do in nRF5340DK. so give it a try, should be same.&nbsp;</p> <p></p><div style="clear:both;"></div>