TIMING-44: Unreasonable User Intra-Clock Uncertainty - 2022.1 English

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

Document ID
UG906
Release Date
2022-05-04
Version
2022.1 English

A user clock uncertainty of <delay> ns is defined on clock <clock_name> (see constraint position <position> in the Timing Constraint window in the Vivado IDE). High user clock uncertainty might adversely impact timing closure. Consider reviewing how much user clock uncertainty is required.