https://devzone.nordicsemi.com/f/nordic-q-a/37038/nrf51822-sdk10-keil5-window751822 problem: the device unexpectedly restarted, the current of the device becomes more than 800 ua, and the same as the jlink download current; the software reset current is still so large, can not be restored, only the power-off restart can be restoreden-USTelligent Community 13Tue, 07 Aug 2018 11:38:54 GMThttps://devzone.nordicsemi.com/thread/143202?ContentTypeID=1Tue, 07 Aug 2018 11:38:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e9df5718-7929-45b6-a99e-a90a9eb65aderun_ar<p>What are the markings on top of the chip you are using?</p> <p>I assume you are reducing the 5v battery voltage to something that is within spec for the chip? i.e. lower than 3.6v.</p> <p>&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/142711?ContentTypeID=1Fri, 03 Aug 2018 01:29:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e3e487e1-9311-4f4a-972a-92d1e61c2990jasonchenjh<p>This happens accidentally, it is not easy to measure the battery voltage at that time.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/142710?ContentTypeID=1Fri, 03 Aug 2018 01:27:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4d668942-b0b9-4f93-8e88-86924da1dbe5jasonchenjh<p>The power supply is 4 dry batteries, and the battery voltage is about 5v.<br />Some people think that the debug mode is turned on, but I have grounded 220 ohms on the SWDCLK pin.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/142582?ContentTypeID=1Thu, 02 Aug 2018 11:20:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7a1c6572-c2e9-41fc-992e-287c39fed5e6run_ar<p>What power supply are you using? What was the voltage when the device restarted? Could you try to measure the voltage when recreating this behavior?</p><div style="clear:both;"></div>