Description - Description - 2025.2 English - UG906

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

Document_ID
UG906
Release_Date
2025-12-10
Version
2025.2 English

Timing clocks propagate globally and cannot be restricted to a hierarchical module. Defining a scoped timing constraint such as set_clock_groups, set_false_path, or set_max_delay -datapath_only between clocks impacts sign-off timing globally for the entire design. This can cause confusion and result in unexpected timing coverage beyond the hierarchical scope. Define these constraints at the top level to ensure the intended behavior.