UPGRADE YOUR BROWSER

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# 22405

8.1i NGDBuild -- Can the BEL constraint warnings from NGDBUILD (WARNING:NgdBuild:483) be safely ignored for XAPP509?

Description

Can the BEL constraint warnings from NGDBUILD (WARNING:NGDBuild:483) be safely ignored for XAPP509?

" WARNING:NgdBuild:483 - Attribute "BEL" on

"receiver_module/data_recovery_unit/lk.da/lf.7.Q_7" is on the wrong type of

object. Please see the Constraints Guide for more information on this

attribute."

Solution

Yes, these warnings can be safely ignored. The constraints are placed on nets in the HDL code, but the synthesis tools push them back to the appropriate FFs that drive the nets during synthesis.

AR# 22405
Date Created 09/04/2007
Last Updated 12/15/2012
Status Active
Type General Article