Sdio voltge level Switching

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Sdio voltge level Switching

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Samsi
Contributor I

hi all ,

we are working with imxrt1170 evk interface to a wifi module. here our wifi module using 3.3 voltage level for sdio  .but i saw our source code is using 1.8 voltage level shifting. Should i switch  the voltage 1.8v to 3.3v level on my code.

how can i do that?

when our code is voltage level 1.8v ,the cmd,data pins high state will be 1.8 v?

 

when our code is voltage level 3.3v ,the cmd,data pins high state will be 3.3 v?

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jingpan
NXP TechSupport
NXP TechSupport

Hi @Samsi ,

SDIO Voltage can be selected by SD1_VSELECT signal.

jingpan_0-1644572103112.png

 

Please refer to EVK schematic.

Regards,

Jing

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