[SI-LIST] DDR Eye diagrams
- From: "Novak David" <david.novak@xxxxxxxxxxx>
- To: "si-list" <si-list@xxxxxxxxxxxxx>
- Date: Tue, 27 Jul 2004 22:19:00 -0500
For measuring DDR eye diagrams, the best location to measure reads is at =
the memory controller and the best place to measure writes is at the =
DDR. For example, measuring reads at the DDR will show more reflections =
than actually seen by the memory controller (I should mention that I =
have only series termination).
This sounds simple, but I cannot think of a way to make the scope =
differentiate between reads and writes. You might suggest that I create =
a memory test which only does reads or only does writes. However, my =
worst case signals are when the entire system is running.
Can anyone tell me how to make the scope trigger only on reads or only =
on writes?
Thanks,
David
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