swapping data lines (the description of NOTE in 3.5.1 Swapping data lines)

[eishishibusawa]

Dear Sir

I refer to the IMX6ULLHDG Rev.0.

It is described in 3.5.1 Swapping data lines as following.

"If byte lane swapping was done, target DDR IC register read value must be transposed according to the data line swapping."

I found the following description in the community.

https://community.nxp.com/message/500248

Q1.

Can I understand that the description of NOTE is TYPO?

Best Regards,

Eishi SHIBUSAWA

[igorpadykov · Accepted solution]

Hi Eishi

NOTE is not typo, but in practice this case is almost never realized

(that is "DDR IC register read value"). NXP BSPs software does not read from ddr mode

registers. If customer reads back ddr mode register, then he should follow this NOTE.

Best regards
igor
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