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About the leak voltage on the CMD line during linux suspend state for i.MX6UL

Question asked by yuuki on Nov 30, 2015
Latest reply on Dec 8, 2015 by igorpadykov

Dear all,

 

We check the operation of Linux on i.MX6UL_EVK board.
We see the leak voltage on the CMD line of the SD card during linx suspend state.
The voltage on the CMD line remains to around 0.6V-0.7V.

CMD line voltage.png

The following command is used to enter a system into the Suspend state.
echo mem > /sys/power/state

 

A used SD card is a SanDisk 4GB SD card included in the EVK board.
A TDK 8GB SD card was the same result, too.

 

Why does such voltage remain on the CDM line?

 

Does this affect the system?
(May this cause some kind of problems?)

 

Best Regards,
Yuuki

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