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Question, i.MX6SX IO Voltage change

Question asked by Masamichi Miyamoto on Apr 10, 2018
Latest reply on Apr 12, 2018 by igorpadykov

Hello team,

 

My customer is trying to switch IO voltage of eMMC from 3.3V to 1.8V.

And they have changed LVE bit in following registers into 1 (this operations were done from u-boot prompt), but they cannot saw the IO voltage got to change.

 

MX6_PAD_SD3_CLK__USDHC3_CLK

MX6_PAD_SD3_CMD__USDHC3_CMD

MX6_PAD_SD3_DATA0__USDHC3_DATA0

MX6_PAD_SD3_DATA1__USDHC3_DATA1

MX6_PAD_SD3_DATA2__USDHC3_DATA2

MX6_PAD_SD3_DATA3__USDHC3_DATA3

MX6_PAD_SD3_DATA4__USDHC3_DATA4

MX6_PAD_SD3_DATA5__USDHC3_DATA5

MX6_PAD_SD3_DATA6__USDHC3_DATA6

MX6_PAD_SD3_DATA7__USDHC3_DATA7

 

Could you show me how to change the IO voltage of eMMC I/F?

 

They tried the way described in the following thread, but they saw there is no change in the IO voltage.

https://community.nxp.com/message/597607

 

Please show me the way to change the IO voltage of eMMC I/F of i.MX6SoloX.

 

Thanks,

Miyamoto

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