Error (169008): Can't turn on open-drain option for differential I/O pin - Error (169008): Can't turn on open-drain option for differential I/O pin Description The Quartus® II software Fitter will generate this error if a design has floating bidir pins with differential HSTL, SSTL and BLVDS I/O standards. Resolution To avoid this Fitter error, connect the floating bidir pins with differential I/O standards to the ALTIOBUF megafunction in differential mode. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 11.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']