Quartus

Can't place ClockLock PLL <name> because of user I/O pin assignments


CAUSE: The Fitter cannot place the specified ClockLock PLL because of assignments you made to the I/O pins the ClockLock PLL uses on the device.
ACTION: Refer to the submessage(s) in the Messages window or the Messages section of the Report window for more information about the ClockLock PLL user assignments, and change or delete these assignments.

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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