https://devzone.nordicsemi.com/f/nordic-q-a/62189/when-reflashing-target-with-power-profiler-kit-attached-the-firmware-is-written-to-the-processor-on-the-ppk-not-the-targetHello, I am using the Power Profiler Kit connected on top of an NRF52840-DK I am using IAR and using IAR&#39;s J-LINK plugin to program/debug an application on the DK. However, if the PPK is attached to the DK, then I find that when I attempt to reflashen-USTelligent Community 13Fri, 05 Jun 2020 10:07:45 GMThttps://devzone.nordicsemi.com/thread/253486?ContentTypeID=1Fri, 05 Jun 2020 10:07:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:82d68528-ec70-4744-a8bb-7d02fbd9df1aSimonr<p>Hi</p> <p>Indeed, you will need to remove the PPK physically in order to program the on-board nRF chip, as the PPK communicates with the debugger when it is mounted. However, your method seems a bit cumbersome. Here are the necessary steps:</p> <p><strong>1. Turn off the DK with the ON/OFF button on the DK.</strong></p> <p><strong>2. Remove the PPK from the DK</strong></p> <p><strong>3. Attach the jumper cable on header P22 to make the DK operate normally again. (As I assume you have cut solder bridge (SB40) which is required to measure current using the PPK).</strong></p> <p><strong>4. Turn the DK back on.</strong></p> <p><strong>5. Flash the target firmware onto the onboard nRF.</strong></p> <p><strong>6. Turn the DK off.</strong></p> <p><strong>7. Remove the jumper cable and reattach the PPK onto the DK.</strong></p> <p><strong>8. Turn the DK back on and measure current.</strong></p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>