Can I connect unused GXB_REFCLK pins directly to GND in Cyclone® V GX devices? - Can I connect unused GXB_REFCLK pins directly to GND in Cyclone® V GX devices? Description Yes, you can connect unused GXB_REFCLK pins directly to GND in Cyclone® V GX. This is indicated in the Cyclone® V Pin Connection Guidelines. However, a Quartus® II generated .pin file for this family indicates that an unused GXB_REFCLK pin should be connected to GXB_GND* (pulldown via a 10K ohm resistor). Resolution This is a bug in the Quartus® II software and will be fixed in a future release. Custom Fields values: ['novalue'] Troubleshooting 2205797432 False ['novalue'] ['FPGA Dev Tools Quartus II Software'] No plan to fix 12.0 ['Cyclone® V FPGAs and SoCs', 'Cyclone® V GX FPGA'] ['novalue'] ['novalue'] ['novalue']