https://devzone.nordicsemi.com/f/nordic-q-a/54041/gpiote-timingI&#39;d like to track pulses coming from external source. Pulses maybe is variable length, some pulses may be treated as illegal ( if they are too short &lt;10 ms ) for ex. For GPIOTE ( or QDEC ) can I set &quot;holding&quot; time before interrupt is generated ? whaten-USTelligent Community 13Wed, 06 Nov 2019 09:19:01 GMThttps://devzone.nordicsemi.com/thread/218752?ContentTypeID=1Wed, 06 Nov 2019 09:19:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:03e6a970-0ebb-4326-9afc-81abfbbfe6e0&#216;yvind<p>Hello Ran,&nbsp;<br /><br /></p> <p>What kind of pulses are you expecting? QDEC could be a solution, I would recommend looking at the <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/qdec_example.html?cp=5_1_4_6_26">QDEC example</a>&nbsp;and the <a href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/qdec.html?resultof=%22%71%64%65%63%22%20">QDEC documentation</a>. Or have a look at the <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/nrf_gpiote_example.html?cp=5_1_4_6_14">GPIOTE example</a>&nbsp;and the <a href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/gpiote.html?resultof=%22%67%70%69%6f%74%65%22%20%22%67%70%69%6f%74%22%20">GPIOTE documentation</a></p> <p>You could use a timer to trigger a compare interrupt every 10ms, which again triggers a callback in your code.&nbsp;<br /><br />There are also some earlier support tickets which cover a similar topic, have a look <a href="https://devzone.nordicsemi.com/f/nordic-q-a/27132/reading-digital-waveform/106801#106801">here,</a> <a href="https://devzone.nordicsemi.com/f/nordic-q-a/34547/ppi-configuration-to-count-pulses">here</a>&nbsp;and <a href="https://devzone.nordicsemi.com/f/nordic-q-a/50228/nrf52840---giving-userdefined-function-at-ppi-task-end">here</a><br /><br />Kind regards,<br />Øyvind</p><div style="clear:both;"></div>