Qsys does not support the Controller shares dq/dqm/addr I/O pins option of the SDRAM Controller - Qsys does not support the Controller shares dq/dqm/addr I/O pins option of the SDRAM Controller Description Qsys does not support the Controller shares dq/dqm/addr I/O pins option of the SDRAM Controller. Attempting to use an SDRAM Controller with Controller shares dq/dqm/addr I/O pins turned on results in an error similar to the following: Error: sdram_0: Invalid tristate bridge selection for pin-sharing. Please parameterize the SDRAM to resolve this issue. Resolution On the Memory Profile page of the Parameter Settings tab of the SDRAM Controller Parameter Editor, turn off Controller shares dq/dqm/addr I/O pins . Custom Fields values: ['novalue'] Troubleshooting novalue True ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 10.0.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']