Why is the input common mode voltage (VICM) of the Arria II GX dedicated transceiver refclk pins lower than the 1.1V device specification? - Why is the input common mode voltage (VICM) of the Arria II GX dedicated transceiver refclk pins lower than the 1.1V device specification? Description Due to a problem in the Quartus ® II software version 13.1 and earlier, the input common mode voltage (VICM) of the Arria ® II GX dedicated transceiver refclk pins with on-chip termination (OCT) enabled is 0.82V instead of 1.1V. A VICM of 0.82v on the dedicated REFCLK pins will not cause any problems when your signal is AC coupled. Resolution This issue will be fixed in a future version of the Quartus ® II software. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Arria® II GX FPGA'] ['novalue'] ['novalue'] ['novalue']