The Quartus II Timing Analyzer automatically performs single-clock frequency analysis as part of compilation. However, the Timing Analyzer can also perform timing analysis on designs that use complex timing assignments, such as designs with multiple clocks.
To perform an accurate multiclock analysis, you must first define the relationship between all clocks in the design. To define this relationship, you must specify which signals function as the absolute clocks (not dependent on other clocks) and the derived clocks (dependent on other clocks) in the design. In the Quartus II software, you define the behavior and requirements of clocks by creating clock settings. Then, you assign these settings to the clock signals in the design.
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