https://devzone.nordicsemi.com/f/nordic-q-a/117559/how-can-i-use-xl0-and-xl1-as-uart-pinthe pin for XL0 and XL1 is P00 and P01 but in my project, I need P00 and P01 works as UART. I set the parameter to start inner RC clock.and find that: LFCLKSTAT show the src is 0 (32.768 kHz RC oscillator) and status is working. the overlay fileen-USTelligent Community 13Tue, 24 Dec 2024 13:30:34 GMThttps://devzone.nordicsemi.com/thread/516222?ContentTypeID=1Tue, 24 Dec 2024 13:30:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0dee16e5-60b1-4d7e-a193-23fd752e6ec9Daniel Chisholm<p>You are doing it correctly.</p> <p>If this is on a DK, there are some solder bridges that need to be cut or jumpered in order to being out P0.0 and P0.1 to the pin header... see silkscreen on back of the board or the DK manual</p><div style="clear:both;"></div>