Quartus

Can't pack non-peripheral register <name> to I/O pin <name> -- register uses an asynchronous preset


CAUSE: You used the Assignment Organizer to turn on the Fast Output Register or Fast Input Register options for the specified register. However, the Fitter cannot assign the non-peripheral register to an I/O cell because it uses an asynchronous a preset signal.
ACTION: Turn off the Fast Input Register or Fast Output Register options for the specified register or remove the asynchronous preset signal from the specified register.

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