Why does the Quartus II fitter report display "unused" in the Termination column when applying the LVDS I/O standard to REFCLK pins in Intel® Arria®10 devices? - Why does the Quartus II fitter report display "unused" in the Termination column when applying the LVDS I/O standard to REFCLK pins in Intel® Arria®10 devices? Description Due to a bug in Quartus® II software version 14.1, the fitter report displays "unused" in the Termination column of Intel Arria 10 devices when both of the following conditions are true: Applying the LVDS I/O standard to the dedicated REFCLK pins Setting the dedicated REFCLK pin XCVR_A10_REFCLK_TERM_TRISTATE = TRISTATE_OFF .qsf assignment The fitter report should display tristate_off . Resolution This problem is rebuilt in v15.0. Custom Fields values: ['novalue'] Troubleshooting 1506809181 False ['novalue'] ['novalue'] novalue novalue ['Arria® 10 GT FPGA', 'Arria® 10 GX FPGA', 'Arria® 10 SX FPGA'] ['novalue'] ['novalue'] ['novalue']