描述

General Description:

I am unable to create a NET TIG constraint on the same net for more than one TSid.

For example:

TIMESPEC "TS_1" = FROM "FFS" TO "FFS" 20 ns;

TIMESPEC "TS_2" = FROM "FFS" TO "PADS" "TS_1" / 1.1;

NET clk TIG TS_1;

Constraints Editor does not allow me to create NET clk TIG TS_2; instead, it replaces the above constraint.

解决方案

To work around this problem, manually manipulate the UCF to create the desired constraint.

This will be fixed in the next major software release (after 5.1i).