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Altera_Forum's avatar
Altera_Forum
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15 years ago

DDR PIN placement error

Hi all, I use a Cyclone IV E EP4CE40F23C8 with Quartus 11.0 I have this error message when i try to place ddr pins --- Quote Start --- Error: altmemphy pin placement was...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

--- Quote Start ---

result i have only some critical warning...

--- Quote End ---

The warnings are telling you what you have done wrong. Consult the pin function tables I posted the link to earlier, and it will tell you what the corresponding differential pair groupings are. The Quartus pin planner device view also shows the pairing.

The warning about device speed grade probably means that the DDR controller was not created with the 'project default device', just go back and regenerate the core.

Cheers,

Dave