[PCB_FORUM] Re: Length matching for DDR

Hi Al,

> I constrained my design to the
> guidelines put out by micron in TN-46-14.

That app note references another app note that outlines the analysis of how
a length match constraint can be calculated for DDR DQ/DQS/DM data group:

http://download.micron.com/pdf/technotes/DDR/tn4611.pdf

From what I can tell from a cursory reading, for DDR, it gives a very good
outline of the overall analysis process, and the issues involved in
calculating "correct" numbers for length matching constraints in general.

Regards,

Austin

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