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AR# 13876

8.1i NGDBuild - "WARNING:NgdBuild:477 - clock net '%s' has non-clock connections Xvendor=%s Xleid=%d Xhiername=%s"


The following warning occurs in NGDBuild:  


"WARNING:NgdBuild:477 - clock net '%s' has non-clock connections Xvendor=%s Xleid=%d Xhiername=%s."


Ensure that the clock signal is connected to synchronous elements on the clock pin. 


When a BUFG or BUFGP is driving non-clock pins, the warning points out non-clock connections on the clock tree. These connections can result in timing constraint overlap and gated clocks; the warning is issued to help you avoid these problems.

AR# 13876
Date Created 08/29/2007
Last Updated 05/14/2014
Status Archive
Type General Article