ID:14759 Too many input pins in I/O bank <name> assigned in VREF group <name> -- no more than <number> input pins are allowed near the VREF pin when voltage referenced pins are driving in
CAUSE: You've assigned input pins to the specified I/O bank near the specified VREF
pin. However, the number of pins exceeds the limit for that VREF
bank and can cause instability in the VREF voltage, which can then cause any inputs depending on that VREF
pin to be read incorrectly.
ACTION: Reassign some of the input pins to a different VREF
bank. Open up Pin Planner to check the pad placement, and then reassign the conflicting I/O pins to different location.