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AR# 39219

14.x Timing Ananlyzer - Timing reports on Period constraints are not consistent before and after running timing analysis against "user specified paths by defining endpoints"

Description

Initially, there is no timing error in the timing report. However, when runningtiming analysis against "user specified paths by defining endpoints," there are timing errors under the period constraints. Why?

Solution

There is an "Include Period and feedback constraints" option which is enabled by default when runningtiming analysis against "user specified paths by defining endpoints." When this option is enabled, the timing analysis includes only the period and feedback constraint, but ignores the other design timing constraints(e.g., TIG, FROM-TO, etc.). So, the generated timing report might be different from the one analyzed against "design timing constraints."

AR# 39219
Date Created 10/10/2011
Last Updated 12/15/2012
Status Active
Type General Article
Tools
  • ISE Design Suite - 11.1
  • ISE Design Suite - 11.2
  • ISE Design Suite - 11.3
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  • ISE Design Suite - 12.1
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