https://devzone.nordicsemi.com/f/nordic-q-a/7544/nrf51822-s-twi-gpiote-current-is-too-bigHi. After stopping the Advertising,I measured the current. For some reason, usually it is consumes about 1.1mA. Because too large current consumption, As a result of looking for a specific location, and are as follows. &#183; GPIOTE CONFIG registeren-USTelligent Community 13Fri, 12 Jun 2015 02:57:55 GMThttps://devzone.nordicsemi.com/thread/26888?ContentTypeID=1Fri, 12 Jun 2015 02:57:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c243e832-d2bd-44fb-8c0e-b6b5f32d75f3cw-park<p>Yes, GPIOTE was set to task mode. and Checked PAN v2.0(39.GPIOTE: 1V2 + HFCLK are requested always when the GPIOTE task is configured.)</p> <p>Also, I had a problem with the GPIOTE</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/26887?ContentTypeID=1Thu, 11 Jun 2015 08:59:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6a26e316-cb9c-4c9d-8c73-c4a80656c5e2Susheel Nuguru<p>GPIOTE draws current if you are configuring it events or task mode, I don&#39;t remember the PAN number but check PAN for your revision. It does not draw too much current if you configure GPIOTE only in PORT mode.</p><div style="clear:both;"></div>