How to Select eMMC 4.5/5.0

[technect]

Hi all,

I have a plan to change the eMMC IC from Sandisk SDIN5C2-8 (4.41) to SDIN7DU2-16G (4.41) or SDIN9DW4-16G (5.0). As I know, I.MX6Q support eMMC up to rev 4.4/4.41, but eMMC 4.4 has been discontinued and there is a possibility eMMC 4.41 will be discontinued. If I should use the 4.5 or upper version eMMC, on what basis I can select high version eMMC?

To summarize,

1. Can I use SDIN7DU2-16G (4.41) or SDIN9DW4-16G (5.0) as booting device?
2. Is there the selection guide for 4.5 or upper version eMMC?
3. When I use 4.5 or 5.0 eMMC, are they going to operate like eMMC 4.4 or lower version?

Thank you,

Gon.

[igorpadykov]

Hi Gon

boot ROM will fall back to the eMMC4.4.1 standard when a eMMC4.5/5.0

capable device is detected. In linux ona can add patch as in

ENGR00234519 mmc: support eMMC v4.5 memory cards (039135c9) | Commits | Android / qmx6_kernel | GitL...

eMMC v5.1 as linux rootfs error with i.MX6

Best regards

igor

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[technect]

Thank you, igor.

I'd like to clarify your reply.

I am interested in is whether eMMC device titled v4.5 or 5.0 on datasheet can be used or not.

As you said, if I use the linux added patch, are any eMMCs (4.5/5.0) available by falling back to the eMMC 4.41 standard regardless of other conditions like vendor, process tech and cell structure?

Best regards,

Gon.

[igorpadykov]

yes any (4.5/5.0) eMMCs will work with this patch.

Best regards

igor

[technect]

Thank you for the clarification, igor.

Best regards,

Gon.