How to bring micro controller out of sleep mode after a certain amount of ticks on a crystal?https://devzone.nordicsemi.com/f/nordic-q-a/25644/how-to-bring-micro-controller-out-of-sleep-mode-after-a-certain-amount-of-ticks-on-a-crystalI am writing code that runs on a NRF51822 (to be less specific it runs on a Red Bear Lab BLE Nano). The board has a 32.768khz crystal on it that I want to use to wake up the chip after a certain amount of time. How do I go about bringing the board outen-USTelligent Community 13Fri, 13 Oct 2017 23:38:40 GMTRE: How to bring micro controller out of sleep mode after a certain amount of ticks on a crystal?https://devzone.nordicsemi.com/thread/101041?ContentTypeID=1Fri, 13 Oct 2017 23:38:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ac5adb40-68d1-4e47-9fd4-3d8223e45a06tyler<p>Do you know if it&#39;s possible to wake up an nrf51822 from systems off sleep mode using an external lfclk?</p><div style="clear:both;"></div>RE: How to bring micro controller out of sleep mode after a certain amount of ticks on a crystal?https://devzone.nordicsemi.com/thread/101040?ContentTypeID=1Thu, 05 Oct 2017 07:40:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:871f4e16-fa85-462a-bc97-6a3d4f54231cBj&#248;rn Kvaale<p>Hi Tyler! This <a href="https://devzone.nordicsemi.com/tutorials/19/">tutorial</a> could be helpful to answer your question. Also, <a href="https://devzone.nordicsemi.com/question/104688/nrf51-sleeping-a-certain-time/">this devzone case</a> will most likely help you further too. Hope that helps! Cheers, Bjørn</p><div style="clear:both;"></div>