https://devzone.nordicsemi.com/f/nordic-q-a/14321/wdt-halts-rtc-after-nvic_systemresetHei! I recently added WDT to my existing project. After that the normal behavior/sequence of code is not as it is supposed to. Strangely it works okay every other run now. The sequence/structure is simple: Initialize RTC module (also startsen-USTelligent Community 13Mon, 06 Jun 2016 15:32:20 GMThttps://devzone.nordicsemi.com/thread/54658?ContentTypeID=1Mon, 06 Jun 2016 15:32:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:31c684cb-df73-4869-906f-613ca208d479Ole Bauck<p>hard to say without having a look at the code, but maybe the LFCLK was not started correctly. The watchdog timer will force the LFCLK RC on if it is no 32KHz source is running (described <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.0/wdt.html?cp=2_2_0_38#concept_ywz_4xw_sr">here</a>)</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/54657?ContentTypeID=1Mon, 06 Jun 2016 14:25:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0d5368cb-cde3-48bb-b750-527dba754944Sven<p>Okay understood, but why does not the RTC counter start to increment? Atleast I should get error when initializing it?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/54656?ContentTypeID=1Mon, 06 Jun 2016 14:19:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6106ee0a-bab1-4624-ba78-724a6ca1fff4Ole Bauck<p>The WDT registers are retained when doing a soft reset (NVIC_SystemReset), see <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.0/power.html?cp=2_2_0_16_6#unique_1090177824">here</a> (and the equivalent chapter in nRF51 reference manual if you are using nRF51), and a watchdog reset will retain other registers, which is probably why you see that every other time it works.</p><div style="clear:both;"></div>