IMX6ULL-MCIMX6Y2CVM08AA

[baijinlong]

               The EMMC clock CLK level is abnormal. Under normal conditions, it is 3.3v level. However, after measurement, it is found that the EMMC clock CLK voltage is always 1.8v. What is the situation? Hope to get your help, thank you!

[igorpadykov]

Hi Jinlong

one can check power supplies of eMMC signals with oscilloscope, if they are changing in

application, please look at Table 91. 14 x 14 mm Functional Contact Assignments for "Power Group"

i.MX6ULL Datasheet
https://www.nxp.com/docs/en/data-sheet/IMX6ULLCEC.pdf 

and check power supplies using Design Checklist

https://www.nxp.com/docs/en/user-guide/IMX6ULLHDG.pdf 

Best regards
igor
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