https://devzone.nordicsemi.com/f/nordic-q-a/3996/rtc0-tick-ppi/** Configures the RTC with TICK for 8Hz */ static void rtc0_config(void) { NRF_RTC0-&gt;PRESCALER = 4095; NRF_RTC0-&gt;INTENSET = RTC_INTENSET_TICK_Msk; NVIC_EnableIRQ(RTC0_IRQn); } /** Init RTC0 */ static void RTC0_init(void) { NRF_RTC0en-USTelligent Community 13Tue, 07 Oct 2014 16:40:55 GMThttps://devzone.nordicsemi.com/thread/14354?ContentTypeID=1Tue, 07 Oct 2014 16:40:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c59dad4f-c9be-4d0b-b622-c4918d0aa79dJose Xavier<p>You&#39;re right, I confuse interrupts with events.</p> <p>Thank you :)</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/14353?ContentTypeID=1Mon, 06 Oct 2014 17:24:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f62b5c23-4632-4995-9bc3-a839bfb1f93dAudun<p>Hi Jose,</p> <p>with the RTC peripheral, you must explicitly enable event generation using the EVTEN registers. To enable the tick event, add the following to your RTC0 initialization: <strong>NRF_RTC0-&gt;EVTENSET = (RTC_EVTENSET_TICK_Enabled &lt;&lt; RTC_EVTENSET_TICK_Pos);</strong></p> <p>Best regards, Audun</p><div style="clear:both;"></div>