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AR# 21539

7.1i Schematic - The Spartan-3E symbol library does not contain obuft4, obuft8, and obuft16


Keywords: missing, available, IO, I/O, macros, 3-state, tri-state, buffer, family, schematic

When creating a schematic design for a Spartan-3E project, I am unable to select the obuft4, obuft8, or obuft16 macro symbols.


The obuft4, obuft8, and obuft16 are valid macros for the Spartan-3E family. However, they were inadvertently left out of the Spartan-3E category file and therefore do not show up in the list of available symbols.

This problem has been fixed in the latest 7.1i Service Pack available at:
The first service pack containing the fix is 7.1i Service Pack 3.
AR# 21539
Date Created 06/02/2005
Last Updated 12/13/2006
Status Archive
Type General Article