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About eMMC's HS400 support in Android's "IMX6_M6.0.1_2.1.0"

Question asked by Yasushi Hasegawa on Apr 24, 2019
Latest reply on May 1, 2019 by igorpadykov

Dear Community members,

 

Our customer is mass producing using i.MX7Solo and Android's "IMX6_M6.0.1_2.1.0".
Customer is verifying that the eMMC device will be revised.

 

[Question.1]
Does this "IMX6_M6.0.1_2.1.0" support HS400 of eMMC?

==> [information]
  The following files have been confirmed.
    myandroid / kernel_imx / Documentation / devicetree / bindings / mmc / mmc.txt
  I confirm that there is the following statement.
    -Mmc-hs400-1_8v: eMMC HS400 mode (1.8 V I / O) is supported

 

[Question.2]
In "6.6.2.3 HS400 timing mode selection" on page 66 of "JEDEC STANDARD JESD 84-B51", it is described that the strobe point is tuned in HS200 mode and then changed to HS400 mode.
Is this flow supported by Android's "IMX6_M6.0.1_2.1.0"?

 

Best Regards,

Yasushi Hasegawa

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