2.8. Package Deskew4.2.3. Package Deskew
If you do not enable the package deskew option, the Quartus Prime software uses the package delay numbers to adjust skews on the appropriate signals; you do not need to adjust for package delays on the board traces. If you do enable the package deskew option, the Quartus Prime software does not use the package delay numbers for timing analysis, and you must deskew the package delays with the board traces for the appropriate signals for your design.
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