Tx2nx sdio level

As shown below, the sdio level standard is CMOS-1.8/3.3V, which means that the SDIO interface supports both 1.8V and 3.3V,or does it require a software or hardware configuration choice?

Refer to the red line description below, is it necessary to add an external pull-up to the carrier plate?

Both 1.8V and 3.3V are supported.

External pull-up is unnecessary as you can see in the Design Guide.

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