https://devzone.nordicsemi.com/f/nordic-q-a/21/how-to-debug-nrf24le1-board-using-jtag-port-on-nrf6310-boardHello Nordic, I tried to debug my board using the JTAG port (P12) on the nRF6310 motherboard. But it&#39;s not possible to flash the chip in Keil. I got the error: &quot;Error: Flash Verify Failed at 0x0000&quot; every time I pressed Download. I already choseen-USTelligent Community 13Thu, 05 Oct 2017 12:35:56 GMThttps://devzone.nordicsemi.com/thread/93?ContentTypeID=1Thu, 05 Oct 2017 12:35:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ced80bda-cd62-4402-9d77-424df0ef662aMonir Hossain<p>This isn&#39;t working for me :(</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/92?ContentTypeID=1Tue, 11 Jun 2013 14:34:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8977f3dd-4391-4e55-a625-64828223d091Hung Bui<p>Hi,</p> <p>It&#39;s most likely that you haven&#39;t set the debug byte in the Infopage to enable the JTAG programming and debugging.</p> <p>You would need to use the ISP interface to flash the chip with the &quot;<strong>Enable debugging (set debug byte in info page)</strong> &quot; option. After that you should be able to flash and debug the chip with your JTAG connection.</p> <p>And please don&#39;t forget to turn the debug bit off with the ISP programming again after you finish debugging. Otherwise the chip will not start up normally but enter debug mode instead. A power reset would not help :)</p><div style="clear:both;"></div>