TIMING-27: Invalid Primary Clock on Hierarchical Pin - 2021.2 English

Vivado Design Suite User Guide: Design Analysis and Closure Techniques (UG906)

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2021.2 English

A primary clock <CLOCK_NAME> is created on an inappropriate internal pin <PIN_NAME>. It is not recommended to create a primary clock on a hierarchical pin when its driver pin has a fanout connected to multiple clock pins.