https://devzone.nordicsemi.com/f/nordic-q-a/21476/how-to-use-the-nrf51-dk-pca10028-debug-my-nrf51822My product only offer a debug interface（SWDIO/REST，SWDCLK，+3.3v，GND），but I learn that the nRF51 DK debug out interface has several pins，such as EXT VTG，EXT GND DETECT，EXT SWDIO，EXT SWDCLK，EXT SWO，EXT RESET。So，how to connect them to my board ？　and shellen-USTelligent Community 13Thu, 20 Apr 2017 06:50:33 GMThttps://devzone.nordicsemi.com/thread/84254?ContentTypeID=1Thu, 20 Apr 2017 06:50:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:13a16ca9-bac2-452e-833a-848285572796Kapil Rawat<p>Hi</p> <p>Follow this tutorial <a href="http://electronut.in/nrf51-dk-external-programming/">Link</a></p> <p>This type of question already asked before eg. <a href="https://devzone.nordicsemi.com/question/23861/can-i-use-the-nrf51-dk-as-a-programmerdebugger-for-the-beacon-kit/">devzone.nordicsemi.com/.../</a></p> <p>All answer have good explanation.</p><div style="clear:both;"></div>