2. 技术支持
  3. AR# 3279: Foundation F1.4 Simulator, XC5200: Outputs are undefined in Timing Simulation
  4. AR# 32793: 11.1 Constraints System - Period Constraint from HDL not propogating to PCF

AR# 32793

11.1 Constraints System - Period Constraint from HDL not propogating to PCF

描述

When trying to apply a Period Constraint in HDL, I find that it does not get propagated to the Timing Report and/or PCF.

How do I overcome this issue?

解决方案

This is a known issue and is scheduled to be fixed in the next major release of the software.

The work-around is to apply a PERIOD Constraints in UCF.

AR# 32793
日期 12/15/2012
状态 Archive
Type 综合文章