Warning (15946): DQS_INPUT_FREQUENCY parameter of DQS delay chain should be equal to the INPUT_FREQUENCY parameter of DLL - Warning (15946): DQS_INPUT_FREQUENCY parameter of DQS delay chain should be equal to the INPUT_FREQUENCY parameter of DLL Description You might see the above warning when compiling an ALTMEMPHY-based DDR2 Controller in Arria® II GX devices: Warning (15946): DQS_INPUT_FREQUENCY parameter of DQS delay chain should be equal to the INPUT_FREQUENCY parameter of DLL Resolution The warning is the result of number conversion errors inside the Quartus® II software and can be safely ignored. Custom Fields values: ['novalue'] Troubleshooting 2205722531 False ['DDR2 SDRAM Controller with ALTMEMPHY IP'] ['FPGA Dev Tools Quartus II Software'] novalue 11.1.1 ['Arria® II GX FPGA', 'Arria® II GZ FPGA', 'Arria® V GT FPGA', 'Arria® V GX FPGA', 'Arria® V ST FPGA', 'Arria® V SX FPGA', 'Cyclone® II FPGAs', 'Cyclone® III FPGAs', 'Cyclone® III LS FPGA', 'Cyclone® IV E FPGA', 'Cyclone® IV GX FPGA', 'Stratix® II FPGAs', 'Stratix® II GX FPGA', 'Stratix® III FPGAs', 'Stratix® IV E FPGA', 'Stratix® IV GT FPGA', 'Stratix® IV GX FPGA', 'Stratix® V E FPGA', 'Stratix® V GS FPGA', 'Stratix® V GT FPGA', 'Stratix® V GX FPGA'] ['novalue'] ['novalue'] ['novalue']