https://devzone.nordicsemi.com/f/nordic-q-a/23752/programming-external-51822-chip-with-51dk-and-mbed---howHello, Can you please provide any link or give me any advice how to connect NRF51822 chip with NRF51DK? Here is my connection that doesnt work: DK GND DETECT and GND together --- NRF 51822 CHIP GND DK SWD CLK --- NRF 51822 SCLK DK SWDIO en-USTelligent Community 13Tue, 25 Jul 2017 11:53:26 GMThttps://devzone.nordicsemi.com/thread/93432?ContentTypeID=1Tue, 25 Jul 2017 11:53:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b907d703-8aa0-45c6-a737-0ffbe23483a5bjorn-spockeli<p>When you flash the mBed firmware to the interface MCU of the nRF51 DK, the board will no longer work as a J-LINK programmer which supports flashing of external targets. You need to program the interface MCU of the nRF51 DK with the JLink firmware as described here described <a href="https://devzone.nordicsemi.com/question/58244/using-the-nrf51-dk-as-external-programmer/">here</a> in order to program an external nRF5x IC.</p> <p>Best regards</p> <p>Bjørn</p><div style="clear:both;"></div>