In one of our projects, which used 5CGXFC5F6M11I7N (Cyclone V) during the layout had been done mistake. How affected on FPGA if up to 4 GND balls are not connected?
No, the FPGA doesn't show any abnormal behavior.
Before I give waiver for next PCB assemblies, I just want be sure that won't be any issues with FPGA.
Attached2 of 4 problem pads