I am attempting to put a KEEPER attribute on an IOB, but the PlanAhead tool does not have a value KEEPER that I can choose.
How can I set this?
This is a known issue in the PlanAhead software. Currently, there is no way to set the KEEPER attribute on the I/O from the PlanAhead tool.
To work around the issuem, edit the ".ucf" manually to add the attribute.
This issue is resolved in ISE Design Suite 12.3.