https://devzone.nordicsemi.com/f/nordic-q-a/82864/nrf52840-swd-pullup-pulldown-disconnectHi! I&#39;ve got over 2000 smartwatches out in the field that are using the nRF52840. The hardware designers thought it was a great idea to expose the SWD pins along with the pins for charging on the rear of the watch, and it&#39;s made programming them withen-USTelligent Community 13Thu, 16 Dec 2021 16:05:34 GMThttps://devzone.nordicsemi.com/thread/343990?ContentTypeID=1Thu, 16 Dec 2021 16:05:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f7da1ff0-ae16-4c48-8536-325cb469063dGordon<p>Ok, thanks - that&#39;s a shame. I was hoping there might have been an undocumented register somewhere I could poke!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/343976?ContentTypeID=1Thu, 16 Dec 2021 15:19:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:927b1929-ab4a-4e9b-9fc5-41dd5b97e45aketiljo<p>No, sorry, The pull up / down resistors are hard wired and can&#39;t be disconnected.&nbsp;</p><div style="clear:both;"></div>