https://devzone.nordicsemi.com/f/nordic-q-a/16881/nrf52-restart-after-hit-iar-breakpoint-and-gonrf52 restart from main() after hit breakpoint and enter [Go] under IAR. It looks like there is some kind timer or watchdog to reset system etc... if stay in breakpoint ( hold system) longer... Is there anyway that we can disable those function to avoiden-USTelligent Community 13Wed, 05 Oct 2016 18:57:39 GMThttps://devzone.nordicsemi.com/thread/64667?ContentTypeID=1Wed, 05 Oct 2016 18:57:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9e650a46-48c7-4021-8bb1-d1c62e9709adAdrian Eggenberger<p>Hi George</p> <p>Your problem probably is a known behavior with the nRF51/nRF52 chips. The problem is, that while you are in the breakpoint the radio ISR is not served and this will cause an assert (don&#39;t know exactly why). You should have a look at this <a href="https://devzone.nordicsemi.com/blogs/877/monitor-mode-debugging-revolutionize-the-way-you-d/">blog entry</a>. The monitor mode will allow you to break the normal system while the high prio ISR&#39;s are served normally.</p> <p>Adrian</p><div style="clear:both;"></div>