説明

General Description: If the following constraints are read into Constraints Editor:

TIMESPEC TSMASTER=FROM:TG_MASTERCLK:TO:FFS:12.3ns

TIMESPEC TSFASTEXCEPT=FROM:FFS:THRU:FASTSIG:TOFFS:TSMASTER;

CE is displays the constraint as:

TIMESPEC TSMASTER=FROM:TG_MASTERCLK:TO:FFS:12.3ns

TIMESPEC TSFASTEXCEPT=FROM:FFS:THRU:FASTSIG:TOFFS:0.0;

This is incorrect.

ソリューション

The solution is to modify the constraint using the Constraints Editor or hand edit

the ucf file. This issue will be addressed in the next software release.