| CAUSE: | You assigned the specified I/O pin to the specified pin location, but, the Fitter cannot place the pin in the location because the I/O standard assigned to the pin requires a VREF value and the VREF pin corresponding to the specified pin location is occupied by a regular I/O pin. |
| ACTION: | Assign the specified I/O pin to a different location that has an available VREF pin corresponding to it. |
See also:
Assigning an Entity or Node to a Location
Assigning Pins
Overview: Making Assignments
Overview: Working with Assignments in the Floorplan Editor
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