https://devzone.nordicsemi.com/f/nordic-q-a/9060/peripherals-examples-are-not-working-in-51-dkHi Am using nrf51dk and keil v5.15 as IDE, using sdk9.0.0 here i cant able to program peripheral examples in dk flash download failed &quot;cortex m0&quot;en-USTelligent Community 13Fri, 04 Sep 2015 10:34:15 GMThttps://devzone.nordicsemi.com/thread/33364?ContentTypeID=1Fri, 04 Sep 2015 10:34:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d113a27a-83e0-4e3d-a8d8-ddb31e1d9019MartinBL<p>Hi,</p> <p>Please see if <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 thread</a> can help you. There are <a href="https://devzone.nordicsemi.com/questions/scope%3Aall/sort%3Arelevance-desc/page%3A1/query%3Aflash%20download%20failed%20%22cortex%20m0/">plenty of cases here on devzone</a> regarding this error.</p><div style="clear:both;"></div>