Jetson xavier nx som_sd pinmux config

We are using Jetson Xavier NX SOM in one of our projects and have designed a separate carrier board for the same.
We have connected the Serial Data to the Wi-Fi Module as IO only card.

In the Jetson Xavier NX Pinmux Configuration, SDMMC3_HV, could you please specify the value to be entered in IO Block Voltage for always 1.8V operation.

Attached the image for reference.

hello user127571 ,

you may toggle the [IO Block Voltage] to configure it as 1.8V,
please also check Pinmux Changes session to change the pinmux configuration applied by the software.