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Altera_Forum's avatar
Altera_Forum
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18 years ago

Should I expect critical warnings in DDR IP code?

I have a 7.2 design with the Altera DDR SDRAM controller megacore function. My design seems to work but I am getting the following critical warnings: Critical Warning: (Critical) Rule A102: Regi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

First, Which DDR controller are you using? Is it the High Performance controller?

Do you have a license for this DDR SDRAM controller? Are you using any other Altera IP? Do you have a license for all of the IP in the design?

If you don't have a license for every IP core in your design, then I believe that these messages may be coming from the OpenCore Plus H/W evaluation logic. In this case, these messages can be safely ignored. See AN320 on the Altera website which describes these warnings.

If you have a license for all of the IP in your design, then you probably should not be getting these warnings, and the warnings may be pointing to a real problem.

If you post the full text of the warning messages by expanding them, I might be able to tell you more.