https://devzone.nordicsemi.com/f/nordic-q-a/20427/pull-up-current-usageIn an answer to this question about current usage of pull-ups here , RK and Vidar comment: Is the GPIO you have configured as a pull up, being pulled down? If so you&#39;d expect to see 3v or so across the 15k or so pull up resistor which is about 200uAen-USTelligent Community 13Wed, 15 Mar 2017 16:18:48 GMThttps://devzone.nordicsemi.com/thread/79638?ContentTypeID=1Wed, 15 Mar 2017 16:18:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d85538ff-d6a7-44c6-97f6-772423f98012Stian R&#248;ed Hafskjold<ul> <li> <p>If the GPIO is configured with a pull-up, and not being pulled to GND, there will not flow any current through the resistor, and therefore it will not consume 200µA.</p> </li> <li> <p>If you configure the input as sense low with a pull-up, current will only flow when you pull the pin down, i.e. to wake up the chip. (or vice versa)</p> </li> </ul><div style="clear:both;"></div>