I just want to clarify what the final routed length of this trace needs to be. AN4215 specifies that the total routed length needs to be
CLK routed distance + DQS routed distance.
I have 2 byte lanes in my DDR2 interface so I have DQS0 and DQS1.
I want to confirm what the correct interpretation is. Is it...
total routed length = CLK + DQS0 + DQS1
total routed length = CLK + (DQS0 or DQS1)
I believe that the latter is correct....
Thanks in advance.