Don't forget to put a phase shift on the ssram clock with respect to the clock you are using on the Avalon interface. So lets say you want to run the SSRAM at 100MHz. You should supply a clock within SOPC Builder to the memory component at 100MHz, but also send a phase shifted version of that clock of -3.38ns. This is so that the data is lined up properly to be sampled on the Avalon clock.
And yes remembering to hook up the clock helps too, not that I've ever done that ... more than four times
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