https://devzone.nordicsemi.com/f/nordic-q-a/3304/jlink-can-not-connect-to-nrf51822use keil to download code to flash fail use nRFgo studio to connect target device error Load C:\Keil\ARM\Device\Nordic\nrf51822_v5.0.0.34603_Backup\Board\pca10001\blinky_example Set JLink Project File to &quot;C:\Keil\ARM\Device\Nordic\nrf51822_v5en-USTelligent Community 13Thu, 18 Sep 2014 11:24:57 GMThttps://devzone.nordicsemi.com/thread/12043?ContentTypeID=1Thu, 18 Sep 2014 11:24:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e92bd0c7-a9df-4fb1-933c-0325a2815835Petter Myhre<p>Maybe <a href="https://devzone.nordicsemi.com/question/64/why-do-i-get-error-flash-download-failed-cortex-m0-when-downloading-a-project-from-keil/">this question</a> is helpful. Please remember to <a href="https://devzone.nordicsemi.com/blogs/4/why-should-i-vote/">vote</a> on <strong>questions</strong> you think are good and useful.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/12042?ContentTypeID=1Wed, 30 Jul 2014 13:11:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f52ac3fb-108d-4744-bac7-c1c31594732ecocoa<p>Hi, pictures are not displayed.</p><div style="clear:both;"></div>