https://devzone.nordicsemi.com/f/nordic-q-a/124075/case-about-nrf54l15-systemoff-gpioHi, When the nRF54L15 enters deep sleep (System OFF) mode by calling sys_poweroff , can the GPIO pins remain at a high level? Kind regards, Peter.Minen-USTelligent Community 13Tue, 02 Sep 2025 14:08:27 GMThttps://devzone.nordicsemi.com/thread/547521?ContentTypeID=1Tue, 02 Sep 2025 14:08:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9ed147e5-dec5-4def-8cec-280079e12fb4H&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> <p>All nRF5-series devices retains the GPIO state while in sleep.</p> <p>Please note that at the time of a wakeup condition occurs, this will cause a system reset.</p> <p>This means that there is a small gap between the device being in reset until it starts to execute code again, where the pins are undefined.</p> <p>&nbsp;</p> <p>It is highly recommended that you have external pull resistors for such a scenario.</p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>