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Altera_Forum's avatar
Altera_Forum
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12 years ago

Full rate PHY selection

I need to generate a DDR3 PHY in Full rate mode for a Cyclone V part. I am using Quartus 13. I select "memory clock frequency:" different numbers like 400, 125, 200MHz. I see only half rate mode can ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

you can only select Full Rate when using the Hard External Memory Interface (which includes PHY and controller). the fabric would not be able to close timing for a full rate controller, so they do not give you the option