DDR3 Swapping data lines and yocto configuration

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DDR3 Swapping data lines and yocto configuration

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Contributor I

Hi,  

we are working with a custom board, that implemented data lines swapping,  the note says target DDR IC register read value must be transposed according to the data line swapping.

Where should I look to set this transpose value into the yocto configuration? Or how this transpose  is configured?

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NXP TechSupport
NXP TechSupport

There is no need for additional mapping or software reconfiguration, as

it is done automatically. Bit swapping is described in sect.3.5.1 Swapping data lines IMX6DQ6SDLHDG

 

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NXP TechSupport
NXP TechSupport

Hi juanalbertogonz

 

regarding " target DDR IC register read value must be transposed according to the data line swapping." -

this is needed for reading MR registers of ddr part. For DDR3(L) memories such reading is not

used. So this may be ignored for DDR3(L).

 

Best regards
igor

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Contributor I

Thanks for the answer

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75 Views
NXP TechSupport
NXP TechSupport

There is no need for additional mapping or software reconfiguration, as

it is done automatically. Bit swapping is described in sect.3.5.1 Swapping data lines IMX6DQ6SDLHDG

 

View solution in original post

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52 Views
Contributor I

Thanks for the answer

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