ODROID-C4 Change Dram MR Value

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caidezhi
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ODROID-C4 Change Dram MR Value

Post by caidezhi »

Could you tell me how to change the Dram mode register value,we have already get the SDK,thx. :D

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Re: ODROID-C4 Change Dram MR Value

Post by odroid »

What is the MR value?
Why do you need to change it for the DDR4 RAM chips on the C4?

caidezhi
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Re: ODROID-C4 Change Dram MR Value

Post by caidezhi »

Thank you for your reply.MR=Mode Register,Some of the mode register settings affect address/command/control input functionality,we want to test Dram in different conditions.

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Re: ODROID-C4 Change Dram MR Value

Post by tobetter »

caidezhi wrote:
Thu Oct 14, 2021 11:13 am
Thank you for your reply.MR=Mode Register,Some of the mode register settings affect address/command/control input functionality,we want to test Dram in different conditions.
Changes for different memory types are limited in this table.
https://github.com/hardkernel/u-boot/bl ... ming.c#L78

They will be managed by a DDR firmware which is not disclosed by Amlogic.
https://github.com/hardkernel/u-boot/tr ... 1/fip/g12a

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