Quartus

Can't place ClockLock PLL <name> because of the assignments made to its corresponding I/O pins


CAUSE: The Fitter cannot place the ClockLock PLL because of the assignments you made to its corresponding I/O pins.
ACTION: Delete or change any conflicting I/O pin assignments in the design.

See also:

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

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