https://devzone.nordicsemi.com/f/nordic-q-a/21012/systick-on-nrf52840-to-geneate-exception-every-1msecHi all, can we configure systick on nrf52840 to genrate exception every 1msec. Tried doing the same but not able to observe correct value. These are my configuration clocksource: cpu; Tickmask: 1; counter enable:1; LOAD: (64000-1); Buten-USTelligent Community 13Mon, 03 Apr 2017 07:32:09 GMThttps://devzone.nordicsemi.com/thread/82106?ContentTypeID=1Mon, 03 Apr 2017 07:32:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:addae0fc-1d08-44d2-8700-1f10d622c581Sigurd<p>Hi,</p> <p>Systick is sourced by the same clock as the CPU, which is turned off when going to sleep(WFE/WFI), so I recommend that you look into using the <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v13.0.0/lib_timer.html?cp=4_0_0_3_39">app_timer</a>(uses the RTC1 peripheral) or the <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52840.ps/timer.html?cp=2_1_0_22#concept_xbd_hqp_sr">TIMER</a> peripheral instead.</p> <p>See <a href="https://devzone.nordicsemi.com/question/72753/clocks-timers-rtc-why/?answer=72870#post-id-72870">this answer</a> about differences between RTC and TIMER peripherals.</p><div style="clear:both;"></div>