https://devzone.nordicsemi.com/f/nordic-q-a/59102/nrf52840-dk-dev-board-debug-in-p18-out-p19-pinout---dyi-cableHi there, Because of the current corona virus I could order a debug in/out cable for the Segger&#39;s build-in debugger (P18 &amp; P19). But I have the cable it self and slot compatible sockets. What I need is the pinout to made the whole debug cable by myselfen-USTelligent Community 13Mon, 16 Mar 2020 15:34:02 GMThttps://devzone.nordicsemi.com/thread/240087?ContentTypeID=1Mon, 16 Mar 2020 15:34:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4f959d45-602f-4a93-b344-ba55440db0e7Hung Bui<p>Hi Redshifter,&nbsp;</p> <p>I&#39;m not sure what you are planning to do.&nbsp; But I assume you know that you can get the hardware design (schematic and layout) of the nRF52 boards from our website.&nbsp;<br />P18 and P19 follow exactly the pins showed in your image.&nbsp;<br />You need at least 4 pins, Vtref, GND, SWDIO, and SWCLK. Pin 9 is connected to 3 and 5 to work as Ground detect. It&#39;s then routed to the Segger OB chip to detect if there is a board connected to the debug out/in port.&nbsp;</p><div style="clear:both;"></div>