Quartus

Tri-state bus <name> fed by inverted tri-state bus <name> but can be fed only by tri-state primitives

CAUSE: You assigned an inverted tri-state bus to a tri-state bus, but tri-state buses can only be fed by tri-state primitives.
ACTION: Replace the inverted tri-state bus with a tri-state primitive (such as TRI or OPNDRN).

- PLDWorld -

 
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