https://devzone.nordicsemi.com/f/nordic-q-a/124174/nrf528540-dongleFolks, We have been developing a product to use the nrf51840 Dongle. Idea being to solder it to a mother board and as it&#39;s pre certified we don&#39;t have to go through RF certification. However, the reset line does not come out on any of the pins, justen-USTelligent Community 13Tue, 09 Sep 2025 08:51:56 GMThttps://devzone.nordicsemi.com/thread/548176?ContentTypeID=1Tue, 09 Sep 2025 08:51:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2e8e6856-4105-439d-99ca-0d1ca75525a0Priyanka<p>Hi,</p> <p>You are not missing anything. As Steve mentioned, you can program and debug using the SWDIO, SWDCLK, VDD and GND pins.</p> <p>The nRF Chip is connected via the SWD pins to the Debug unit.</p> <p>Please take a look at this:&nbsp;<a href="https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/app_dev/device_guides/custom/programming_custom_board.html">https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/app_dev/device_guides/custom/programming_custom_board.html</a>&nbsp;</p> <p>And in case you actually need to use the RESET, the hardware reset is on P0.18 internally (and it&#39;s connected to the button SW2 on the side of the Dongle) so maybe you can route it to some test pad outside.</p> <p>-Priyanka</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/547967?ContentTypeID=1Fri, 05 Sep 2025 17:41:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9398c3b8-7ab2-47b7-810d-56627c90b3abSteve Rathjen<p>Are you referring the NRF52840 dongle?&nbsp; If so, the RESET wasn&#39;t required when I used it.&nbsp; There are two castellated pads (on either edge) near the USB plug that are the SWDCLK and SDIO for the programmer/debugger, as you mentioned.&nbsp; I&#39;ve used these successfully with GND and V+ connections only... no RESET.</p><div style="clear:both;"></div>