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Altera_Forum's avatar
Altera_Forum
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16 years ago

SOPC HP DDR2 Controller Clock Rate

I've installed a HP DDR2 Controller in the SOPC Builder. I'm curious what clock rate I can run this at. My memory can run at 400MHz CL = 3, 533MHz at CL = 4 and 667MHz at CL = 5. I'm running the c...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

My bad. The 400MHz is for the -2 part.

I have been able to run this at 360MHz so far and it works. I did get a warning that the "Stratix III speed grade 3 does not support DDR2 SDRAM operation above 333.0MHz". But I compiled anyway and measured the clock at 360MHz. No timing errors.

So I'll probably go back to 333 and stick with that.