Quartus

I/O ATOM <name>, which has its OPERATION_MODE parameter value set to either OUTPUT or BIDIR, must have data source


CAUSE: The specified I/O ATOM, which has its OPERATION_MODE parameter value set to either OUTPUT or BIDIR, does not have a data source. The I/O ATOM must have a datain port connection, its oe port set to GND, or the I/O ATOM's REG_SOURCE_MODE parameter value changed to PIN_LOOP.
ACTION: If you are using an EDA tool, contact the technical support for the EDA tool regarding this message. Otherwise, contact Altera Applications for assistance.

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