https://devzone.nordicsemi.com/f/nordic-q-a/541/nrf51822-power-modesHi, How to put nrf51822 in power off mode? i simply tried NRF_POWER-&gt;SYSTEMOFF = 1; in keil but it is not going to off mode. Is there any procedure before making SYSTEMOFF =1. Our project requires optimization on battery power consumption, so thaten-USTelligent Community 13Mon, 30 Sep 2013 06:42:49 GMThttps://devzone.nordicsemi.com/thread/2792?ContentTypeID=1Mon, 30 Sep 2013 06:42:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8a9b061c-c5b6-4797-a3c6-f64c06900afcNils Minor<p>Hi,</p> <p>maybe this i usefull for u, how to handle your power-modes: <a href="https://devzone.nordicsemi.com/index.php/how-to-reset-the-device">devzone.nordicsemi.com/.../how-to-reset-the-device</a></p> <p>I think if you are using the SD you have to use the nrf_soc api to do the same, but only with the softdvie.</p> <p>best regards Nils</p><div style="clear:both;"></div>