https://devzone.nordicsemi.com/f/nordic-q-a/1875/nrf51822---debug-output-via-j-link-swoIn the comment of this post , Marc Nicholas wrote: Doesn&#39;t that require SWO to be implemented? (Which is not on the Nordic part). Is it true, that SWO isn&#39;t available on the nRF51822?en-USTelligent Community 13Fri, 04 Jul 2014 11:44:26 GMThttps://devzone.nordicsemi.com/thread/8100?ContentTypeID=1Fri, 04 Jul 2014 11:44:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6b8d3b92-ae04-4c79-879a-aa2ab21f1c46leo<p>hi ole, just to make sure. Its implemented in J-Link since 4.74 [1], but we can&#39;t use it with nrf51 because, the hardware is missing? [1] <a href="http://www.segger.com/j-link-release-notes.html">www.segger.com/j-link-release-notes.html</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/8099?ContentTypeID=1Thu, 13 Mar 2014 12:56:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:848cd267-28e9-4ffb-b11b-04b27362121fOle Morten<p>Marc is correct, there is no tracing hardware in the nRF51 series, neither in the nRF51822 nor the nRF51422.</p><div style="clear:both;"></div>