ID:18163 Pin ~ALTERA_CLKUSR~ was reserved for calibration. This pin must be assigned a 100-125 MHz clock.

CAUSE: CLKUSR pin has been reserved for calibration and must be assigned a clock of 100-125 MHz. This is a preemtive warning.

ACTION: Assign the CLKUSR pin to a 100-125 MHz clock. If the pin has already been assigned the correct clock frequency, use the QSF assignment 'set_global_assignment -name MESSAGE_DISABLE <message_id>' to suppress this critical warning.