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Altera_Forum
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13 years ago

How to use multiple sdc files?

In Settings for TimeQuest Timing Analyzer, we can add several sdc files into it. I just wonder in which case we should use multiple sdc files? If in my design, there are several sub modules, ca...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

In case of really large project that span months of team work you may prefer to have a main project sdc file that can call some lower sdc files that contain constraints specific to nodes in lower modules. You will put clock, pins etc in top level and local constraints such as multicycles or delays in lower level sdc files then call them up from top sdc using:

read_sdc sdc1.sdc

read_sdc sdc2.sdc

This is convenient for team work when a designer of lower module passes constraints to project level integrator.