Report Summary Section - 2020.2 English

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

Document ID
UG906
Release Date
2021-01-25
Version
2020.2 English

The Report Summary section reports all the set_bus_skew constraints defined in the design. The following information is reported for each constraint:

  • Id: constraint Id referred later in the report (makes it easier to search for that constraint inside the report).
  • From: pattern provided for the set_bus_skew -from option.
  • To: pattern provided for the set_bus_skew -to option.
  • Corner: corner (Slow or Fast) in which the worst bus skew was computed.
  • Requirement: bus skew target value.
  • Actual: worst bus skew computed across all the paths covered by the constraint.
  • Slack: difference between the worst bus skew and the constraint requirement.

In the following example, the design has only one bus skew constraint with a 1 ns requirement. The worst skew among all the paths covered by the constraint is 1.107 ns.