https://devzone.nordicsemi.com/f/nordic-q-a/8662/how-long-does-mcu-wake-up-from-register-retention-modeHi all, I want to know how long it takes for NRF24LE1 to wake up from low power mode, especially in these situations: 1) Wakeup from pin voltage level , from Register retention timers off/on mode: 2) Wakeup from TICK interrrupt , from Registeren-USTelligent Community 13Thu, 13 Aug 2015 07:52:05 GMThttps://devzone.nordicsemi.com/thread/31726?ContentTypeID=1Thu, 13 Aug 2015 07:52:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:32db1821-feb9-4532-9048-f1a359d39c2bHung Bui<p>Hi Junma,</p> <p>I afraid we don&#39;t have any further information than what provided at chapter 11 in the product spec.</p> <ol> <li> <p>Wake up from pin: the start up time will be &lt;100us.</p> </li> <li> <p>Wake up from TICK: the CPU will wake up before the TICK happens, called pre-tick wakeup. This also &lt;100us.</p> </li> </ol><div style="clear:both;"></div>