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.
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?)