https://devzone.nordicsemi.com/f/nordic-q-a/107442/nrf52840-software-reset-doesn-t-disable-the-watchdogWe try to test our bootloader (using nRF52840 DK for this). The firmware that we use to test the bootloader includes an implementation of Watchdog, it works, based on the example: &quot;\v2.5.0\zephyr\samples\drivers\watchdog&quot;. On the bootloader side, ween-USTelligent Community 13Wed, 17 Jan 2024 13:00:07 GMThttps://devzone.nordicsemi.com/thread/464595?ContentTypeID=1Wed, 17 Jan 2024 13:00:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e357c538-cb02-47f1-95f2-8cc62f739b9bH&#229;kon Alseth<p>Hi,</p> [quote user=""]2) If we use Software reset (for example, using the function: &quot;sys_reboot(SYS_REBOOT_COLD)&quot;), then the bootloader is rebooted twice:<br />- first time due to Software reset;<br />- second time reason Watchdog.<br />[/quote] <p>A software reset (NVIC_SystemReset or sys_reboot()) will not reset the watchdog. Only a power on reset or letting the watchdog time out will reset it.</p> <p>&nbsp;</p> <p>What you can do is to make mcuboot &quot;watchdog aware&quot; by setting this in the child_image/mcuboot.conf (or your equivilant mcuboot configuration):</p> <p>CONFIG_BOOT_WATCHDOG_FEED=y</p> <p>&nbsp;</p> <p>Could you try this and see if this helps?</p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>