https://devzone.nordicsemi.com/f/nordic-q-a/71812/questions-about-rtc-exampleHi, all I&#39;m using nRF52840, pca10056. I have a question about the rtc example of peripheral. I want to know the difference between &#39;nrf_drv_rtc_init&#39; and &#39;nrf_drv_rtc_cc_set&#39; exactly. What I confusing : 1. I changed config.prescaler valueen-USTelligent Community 13Mon, 22 Feb 2021 12:48:33 GMThttps://devzone.nordicsemi.com/thread/295563?ContentTypeID=1Mon, 22 Feb 2021 12:48:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3387f52d-86bc-4d62-9286-e759b11ef57eVidar Berg<p>Hello,</p> <p>1. The <span><a title=" PRESCALER " href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/rtc.html?cp=4_2_0_24_9_6#register.PRESCALER">PRESCALER </a></span><span>register is 12 bit, which means that 4095 is the largest prescaler setting you can use. Please see the &quot;<a title="Resolution versus overflow and the PRESCALER" href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/rtc.html?cp=4_2_0_24_1#concept_iwc_1mj_sr">Resolution versus overflow and the PRESCALER</a>&quot; section of the PS for more examples of how you can calculate the frequency. </span></p> <p><span>2. This function sets the CC[x] registers to use the <a title="Compare feature" href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/rtc.html?cp=4_2_0_24_6#compare_feature">Compare feature</a>, and it controls the interval at which the NRF_DRV_RTC_INT_COMPAREx event is triggered ( 3 seconds by default)</span></p> <p><span>3. Interrupts are cleared when the program exits your rtc_handler() function. This allows the RTC to trigger a new interrupt next time the NRF_DRV_RTC_INT_COMPARE0 or the NRF_DRV_RTC_INT_TICK event occurs.</span></p> <p><span>Best regards,</span></p> <p><span>Vidar</span></p><div style="clear:both;"></div>