We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 32843

11.1 Constraints Editor - Option of deselecting the reference timespec is not available in the table


There is an option of specifying a PERIOD Constraint as a reference of another PERIOD Constraint, but I am unable to modify the Reference Timespec back to Explicit TimeSpec in the Constraints Editor GUI.  


Is this a known issue?


This is a known issue that is scheduled to be fixed in the next quarterly release of ISE (11.3). 


In the meantime, to work around this problem, modify the constraints manually.

AR# 32843
Date Created 06/25/2009
Last Updated 05/23/2014
Status Archive
Type General Article