https://devzone.nordicsemi.com/f/nordic-q-a/45134/powering-sensor-through-gpioHello all, In order to optimize my power design, I want to power my sensors though GPIO pin on nrf52832 and toggle the pin when I need to use them. I have two sensors on one twim bus. I configured a GPIO in the following way: A timer is fireden-USTelligent Community 13Wed, 20 Mar 2019 14:29:00 GMThttps://devzone.nordicsemi.com/thread/177384?ContentTypeID=1Wed, 20 Mar 2019 14:29:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:92b49ed9-a19f-44bf-a9f0-e295d2a84ea7ilkobg<p>Hi Simon,</p> <p>You are right - I didn&#39;t see that pins 9 and 10 are for the NFC. I used another GPIO for my purpose.</p> <p>I&#39;m using I2C, <strong>which needed a small delay</strong> just after setting a high level on the pin, to make it with the power.</p> <p></p> <p>Thank you!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/177338?ContentTypeID=1Wed, 20 Mar 2019 12:56:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:89793923-203c-4853-a580-50d4e49b3b92Simonr<p>Hi</p> <p>Are you aware that pins 9 and 10 are the nRF52s NFC pins, and that you have to specifically configure them as GPIOs if you are using them as such. Configuring them as GPIOs is done like <a href="https://devzone.nordicsemi.com/f/nordic-q-a/10020/struggling-with-basic-gpio-read-on-nrf52">this if you are using Keil</a>, and as shown in this picture if you are using SES:&nbsp;</p> <p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-4c5ad8a1e9674befa653a111de10d866/pastedimage1553086071654v1.png" alt=" " /></p> <p>If you have already done this, please specify whether you are using SPI or I2C in your project, and I will look into it.</p> <p>Best regards,</p> <p>Simon</p> <p>EDIT: You could also just use any of the regular GPIO pins instead of configuring your NFC pins as GPIOs.</p><div style="clear:both;"></div>