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# 19643

6.2is3 CPLDFit - When a pad-specific OFFSET constraint is placed on a bidirectional port, warnings occur in the fitter report


General Description: 
When a pin-specific OFFSET constraint is placed on a bidirectional port, the following warning occurs in the fitter report. 
"WARNING:Cpld:1151 - Cannot locate data input pad for OFFSET timespec 
'IN:44.000nS:BEFORE:CLK', the timespec is ignored."


This is a known issue and will be fixed in a future release of software. 
To work around this issue, create a global OFFSET constraint and then use specific OFFSET constraints if necessary for other non-bidirectional pads.
AR# 19643
Date Created 09/03/2007
Last Updated 05/26/2014
Status Archive
Type General Article