Quartus

I/O cell <name> has differential I/O standard, but is assigned to a pin that does not support differential I/O standards


CAUSE: You assigned the specified I/O cell to a pin. You have also assigned a differential I/O standard to the specified I/O cell. However, the destination pin does not support differential I/O standards.
ACTION: Remove the differential I/O standard assigned to the specified I/O cell, or assign the specified I/O cell to a different location.

See also:

Assigning Pins
Deleting Assignments in the Assignment Organizer
Changing Assignments
Overview: Working with Assignments in the Assignment Organizer

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