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QII 12.1 synthesizer problem!!!

Altera_Forum
Honored Contributor II
‎12-26-2012 04:13 AM
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I don't know what just happened, but when I compile my previous project (with QII 11.1) with QII 12.1 the I get the fitter error! 

It seems all my projects use more LUTs by 12.1, in example my latest project in 11.1 was abou 13KLUT but with 12.1 synthesizer estimates 47KLUTs.:confused: 

Can anyone explain this to me? what just happened? same vhdl code with different LUTs size!!!!!!
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Altera_Forum
Honored Contributor II
‎12-26-2012 08:24 PM
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Look at the individual component resource usage. Compare each vs your compile with QII 11.1. (Compile your design into a much larger part for QII 12.1 if you need to. 

 

I'll bet that one of your components had a RAM/ROM block that may have synthesized into LUTs instead of a memory block. You could also check the warnings for your compile. It may give you hints as to what has happened.
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