https://devzone.nordicsemi.com/f/nordic-q-a/76437/nrf52810-serial-wire-debug-be-used-as-gpio-i2cHi, dear Nordic 1) Could nRF52810 Serial Debug Pin be used as GPIO/I2C? 2) Some post mentions using the external circuit, so that the 2 Serial Wire Debug pins can be used as GPIO. Do you have any reference designs, please? Thanksen-USTelligent Community 13Wed, 23 Jun 2021 11:44:33 GMThttps://devzone.nordicsemi.com/thread/316703?ContentTypeID=1Wed, 23 Jun 2021 11:44:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:14bb661a-8622-4f5d-ad38-786e6a93cec4ketiljo<p>That&#39;s correct. In case you have to manually program the device, you would need to have access to these pins. Also for debugging you will need this.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/315989?ContentTypeID=1Fri, 18 Jun 2021 02:41:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d8681968-9359-4f35-bc20-7ad80448822dStevenW807<p>So if I use OTA DFU, then, my SWDCLK and SWDIO will only be used when I upload the program for the 1st time, is that correct? It seems not very &quot;smart&quot; because these 2 pins will just be used once for the entire life.&nbsp;</p> <p>Thanks ketiljo</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/315745?ContentTypeID=1Thu, 17 Jun 2021 06:38:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:701b8f66-3557-47c5-81e2-75bff7984172ketiljo<p>The SWDCLK and SWDIO pins are exclusive for the programmer/debugger and can not be assigned to other functions.&nbsp;</p><div style="clear:both;"></div>