DDR3 Layout Length Matching

Hi Ken,

Thank you very much I understand better.

You say," if clock is external then it should be at least 20% longer. This is the case in teble 2.4 (clock is 90% longer), and fig 2.22 (clock is external)."

For exemple if clock is in TOP and other in internal layer , this length must be +20% mini and +90%max. It's goodt?

In MX53GU.pdf table 2-2, on line 2 "Address and Command" and line 7 "Control signals". The length recommended is between Clock (min) – 200 and Clock (min).

But nothing is specified about address, command and control signals in the table 2-4.

What are their lengths in table 2-4?

Thank.

Laurent