https://devzone.nordicsemi.com/f/nordic-q-a/1458/is-it-possible-to-create-a-gpio-button-interrupt-without-gpioteHello I&#39;m using nrf51822 EK board. This is my first time to develop application in ARM system. I want to develop a ble application. This application can be shut down (system off) by pressing the button for 5 seconds. Since I read this &quot; devzoneen-USTelligent Community 13Mon, 27 Jan 2014 09:24:07 GMThttps://devzone.nordicsemi.com/thread/6514?ContentTypeID=1Mon, 27 Jan 2014 09:24:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:56f1023e-f9dc-4691-99ff-5fdbf39f65a8Scarlet<p>Thanks Ole I will try it!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/6513?ContentTypeID=1Mon, 27 Jan 2014 09:00:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9fca5829-bf23-4588-98c4-88bff9eeda93Ole Morten<p>You should use the PORT event to trigger a pin interrupt without increasing the current consumption.</p> <p>You can refer to the GPIO projects available <a href="https://github.com/NordicSemiconductor/nrf51-powerdown-examples/">here</a> for an example of how this can be used, specifically <a href="https://github.com/NordicSemiconductor/nrf51-powerdown-examples/blob/master/system-on-wakeup-on-gpio/main.c">this main.c file</a>.</p><div style="clear:both;"></div>