https://devzone.nordicsemi.com/f/nordic-q-a/57398/i2c-on-nfc-linesWe have our SCL line on P0.10 (NFC2) and SDA P0.23 When I try to start a I2C transaction nothing happens, and NRF_TWIM0-&gt;TXD.AMOUNT = 0. I have verified that SDA/SCL are pulled high. However, I can run the same code changing the pins to P0.26, P0en-USTelligent Community 13Wed, 05 Feb 2020 21:05:14 GMThttps://devzone.nordicsemi.com/thread/232927?ContentTypeID=1Wed, 05 Feb 2020 21:05:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:37931c87-0a11-4fc6-8829-933e4cb445efMark Samarin<p>Thanks that did it :-)</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/232835?ContentTypeID=1Wed, 05 Feb 2020 12:50:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f4ae3904-be4e-43d0-8670-17e02945d03cSimonr<p>Hi Mark</p> <p>You&#39;ll have to specifically configure the NFC pins as such if you want to use them as GPIOs. You can configure these pins as GPIOs by defining the CONFIG_NFCT_PINS_AS_GPIOS variable in your project settings. Please do so and try again.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>