How do I get SSRAM to run at 125MHz?

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originally posted by svhb@Sep 1 2006, 06:13 AM

for the cycloneii kit, i had the same problem.

i adjusted the skew to -1.5ns, then the ssram worked on 120mc.

so indeed it is a matter of adjusting the skew to the correct value. trial and error, or following the description in the ssram core manual.

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I tried -4.8ns and it verified the code after downloading it from the IDE, but nothing happened after that. I&#39;m doing a compile with -1.5ns now.

Has anyone successfully used SSRAM at 125 (or higher) MHz on a Stratix II development kit? If so what skew did you use for the SSRAM clock?

Alternatively, what signals should I be looking at on a logic analyzer to determine what the ideal skew for my design is? SSRAM uses quite a few more signals than the mictor connector provides.