Is there any known issue when using altdq_dqs megafunction as RLDRAMII mode in Quartus II 11.1SP2? - Is there any known issue when using altdq_dqs megafunction as RLDRAMII mode in Quartus II 11.1SP2? Description Yes. When you use altdq_dqs megafunction and set “RLDRAMII mode” as “x18” or “x36” in Parameter Settings page, you may find the port width of dqs_bus_out in the IP top file is mismatched. Declaration of dqs_bus_out in IP top file is output [0:0] dqs_bus_out; The expected declaration of dqs_bus_out should be: output [1:0] dqs_bus_out; As a workaround, please change the port width of dqs_bus_out manually. This issue will be fixed in Quartus® II software future version. Resolution Change output [0:0] dqs_bus_out; To output [1:0] dqs_bus_out; Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Stratix® IV GX FPGA'] ['novalue'] ['novalue'] ['novalue']