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Altera_Forum's avatar
Altera_Forum
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19 years ago

ddr_sdram problem

i use the ddr_sdram for a system,but when i compile the system,errors happened in the fitter step.the errors are: Error: Specified DDIO registers are not part of a legal DDIO circuit Erro...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

I've instantiated the design fromSOPC builder for the Cyclone II board. As far as I can see I've implemented exactly the same banks and everything else as in the example design. Apologies, I missed that the top message was using the standard example design, I'm using the same board but a new project.

By removing the offending commands I was able to synthesis the design, so it doesn't really matter any more. But I assume that these instructions are included for a reason? I would like to not have to hack these out of the assignment file if I could.