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About EMMC voltage

Question asked by Zongyuan Liu on Mar 26, 2017
Latest reply on Mar 27, 2017 by Artur Petukhov

Hi, guys. I am reading emmc 5.1 spec now. However, I am confused with voltage of emmc. Please look at this image

What is the meaning of positive supply voltage ground?

Why this supply voltage ground is positive, not zero?

Why it adds this supply voltage ground in this spec?

 

I am looking for your answers.

 

Thanks.

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