https://devzone.nordicsemi.com/f/nordic-q-a/19457/does-iar-support-nrf51-monitor-mode-debuggerI made IAR work with nrf52 in monitor mode debugger. I also would like to try this to nrf51. I found nrf51 doesn&#39;t have DebugMon_handler......Please confirm can I single step nrf51 ( softdevice) with IAR ? or there is no way [?to use any debugger?] toen-USTelligent Community 13Sat, 04 Feb 2017 00:20:13 GMThttps://devzone.nordicsemi.com/thread/75590?ContentTypeID=1Sat, 04 Feb 2017 00:20:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bf279c9f-f5f1-4dd6-98ea-84c022a25d28leonwj<p>Hello George,</p> <p>In your previous question regarding MMD (<a href="https://devzone.nordicsemi.com/question/111867/how-do-i-solve-this-softdevice-assert-when-i-use-iar-monitor-mode-debugger/">link</a>), Ole advised you to take a look at the following <a href="https://devzone.nordicsemi.com/blogs/877/monitor-mode-debugging-revolutionize-the-way-you-d/">blog entry</a>, in there it clearly states the following:</p> <p>&quot;<strong><em>Monitor Mode debugging will only work on nRF52 series devices because it requires the Debug Monitor exception that is available on Cortex-M4 CPUs</em></strong>.&quot;</p> <p>Regards,</p><div style="clear:both;"></div>