https://devzone.nordicsemi.com/f/nordic-q-a/50001/nrf52832---how-to-get-chip-to-reset-while-leaving-uart-lines-connected-to-pcHi there, On our test jig, we are using two IO pins of nRF52832 as UART lines that goes to a UART dongle to the PC. When we pull the power plug to the Nordic chip and have the UART dongle still connected to the PC, we can still communicate with theen-USTelligent Community 13Fri, 19 Jul 2019 11:10:49 GMThttps://devzone.nordicsemi.com/thread/199502?ContentTypeID=1Fri, 19 Jul 2019 11:10:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:20563b50-0b7c-4a87-98ee-7b995afd126dJared<p>Hi,</p> <p>Unfortunately, setting the GPIO pin as input and disconnecting the input buffer will not take affect if you cut the power supply to the Nordic. As in the linked case, you would need to either manually disconnect the UART lines or have some kind of switch that you could control. You should also make sure that you don&#39;t exceed the absolute maximum ratings voltage on the I/O line of VDD + 0.3.&nbsp;</p> <p>regards</p> <p>Jared&nbsp;</p><div style="clear:both;"></div>