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AR# 6383

4.1i Constraints Editor - The definition "TIMESPEC TSxx = FROM(abc) TO(xyz)" generates the warning: "Unable to create FROM TO with tsxx."


General Description:

The following timespec definition is not understood by Constraints Editor:

timespec ts05 = from pads(pclk) to ffs = 6 ns;

The following warning is generated:

WARNING: Unable to create FROM TO with ts05.


The warning can either be ignored, or you can modify the UCF file to include the timegrp, and then the timespec.

For example:

timegrp pad_pclk = pads(pclk);

timespec ts05 = from pad_pclk to ffs = 6ns;

This is fixed in the 4.1i software release.

AR# 6383
Date Created 08/31/2007
Last Updated 01/18/2010
Status Archive
Type General Article