Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Use DIMM with two DQS pairs swapped?

I have a prototype board that uses a DDR2 SO-DIMM. Due to a design error, the DQS6 and DQS7 pairs are swapped. Would the design still work? The DDR interface is very slow on this board and all...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

You can switch around any DQ groups. The PHY doesnt care and the user is invisible to it as the mix up on the way to the memory gets corrected on the way back.