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Altera_Forum's avatar
Altera_Forum
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13 years ago

Impact of .sdc-Constrainsfile to Fitter

I have a basic understanding problem of meaning of .sdc-Constainsfile for Quartus Project. First I understand is, that I can define Timing-Constrains in .sdc-File, that I can check with Timequest ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Quartus uses the .SDC file. It will generate a warning if you do not include one.

In the Quartus GUI, look at the setting: Assignments->Settings, Category: Fitter Settings.

There is a section called "Timing-driven compilation".

You can check the "Optimize multi-corner timing" to tell Quartus to use the .SDC file at all process-voltage-temperature (PVT) settings, otherwise it just meets timing at the nominal speed grade setting.

Cheers,

Dave