https://devzone.nordicsemi.com/f/nordic-q-a/69929/nrf52840-dk-board-program-using-swdcan we program nrf52840 using swd ?? if yes then how to connect ??en-USTelligent Community 13Mon, 28 Dec 2020 12:57:59 GMThttps://devzone.nordicsemi.com/thread/286694?ContentTypeID=1Mon, 28 Dec 2020 12:57:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f00686bf-3ecb-4dba-845b-92b7cba970dcStian R&#248;ed Hafskjold<p>You have to connect the debugger (preferably a JLINK debugger) using SWDIO and SWDCLK. The debugger also requires a voltage reference to VDD, usually called VREF. Also remember to connect GND.</p> <p>(In the title you wrote &quot;nrf52840 dk&quot;. The nRF52840 DK has an onboard debugger, so no need for an extra one. If you want to use an external debugger there is a header called &quot;debug in&quot;. You can connect the debugger to this header using a standard 10-pin SWD connector.)</p><div style="clear:both;"></div>