Please tell me about SDC hierarchical design. I have an SDC file that targets a lower module in my design, but when I use it as is, it is not constrained correctly. What should I do?

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What is the hierarchical design of SDC? I have an .sdc file that targets a lower module in my design, but if I use it as is, it does not constrain correctly. What should I do?

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If you have SDC files for the lower levels, the most intuitive and easiest way is to eventually merge them to the top.

For example, if you are doing a hierarchical design, designing a lower module as the top, and creating an SDC file for that module, in the end, the SDC file will be generated again on the top module after integration. , merge the SDCs in the lower hierarchy.
However, SDC files generated from various Intel IPs are assumed to be used in the lower layers of a hierarchical design, and are correctly constrained by the descriptions in the SDC file and the TCL files called from it, so do not change. , can be used as is.

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