SDMMC pin with1.8V slave device


from Jetson_AGX_Orin_Design_Guide_DG document, chapter 10 SDIO & SDCARD chapter

E8 SDCARD_D0 GP131_SDMMC_A0 SD Card (or SDIO) Data 0 Bidir CMOS – 3.3V/1.8V

I wonder when these CMOS-3.3V/1.8V pin output 3.3V instead of 1.8V,

can the output level be configured by registers after startup?
what’s the default level of these pins ? since they all marked as pd in the pin description sheet, are these pin 1.8V under POR?

If we connected these pins to a slave devcie with 1.8V maximum tolerant, Is there any chances that the slave will be damaged?

Please check the SDMMC specification first. The IO voltage could switch to 3.3V or 1.8V during work based on data rate needed.

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