https://devzone.nordicsemi.com/f/nordic-q-a/3095/system-off-wake-up-with-internal-rc-rtcHi All, I am working in the sleep mode with system off and wake up with internal RC RTC. It function well when connected to EV board... I see the &quot;Emulated System OFF mode&quot; in reference manual. Any step I need to do to make it work on my PCBAen-USTelligent Community 13Thu, 04 Sep 2014 17:33:27 GMThttps://devzone.nordicsemi.com/thread/11500?ContentTypeID=1Thu, 04 Sep 2014 17:33:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:03140098-9db2-4214-bd89-dbc6f1b54490Petter Myhre<p>In system off mode, all clock sources and peripherals on the chip are turned off, please see <a href="https://devzone.nordicsemi.com/question/113/32khz-running-in-off-mode-on-nrf51822/">this question</a> for more information.</p> <p>In debug interface mode, System OFF will be emulated to facilitate debugging of the device while in System OFF. In Emulated System OFF mode the power consumption will be high, it is not supposed to be used in normal operation.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/11499?ContentTypeID=1Thu, 07 Aug 2014 00:03:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:21885fba-a2ff-42e1-bf21-9cc59c514982tim<p>You can do System ON wake up with an internal RTC TIMER But System OFF will not be possible.</p><div style="clear:both;"></div>