Description
In Altmemphy version 7.1, you will not be able to implement differential DQS mode or be able to assign differential I/O standard to the DQS pins. The IP will be fixed to support differential DQS mode in the future version of Altmemphy and you will be able to choose differential DQS mode and implement this mode without getting a no fit error in Quartus® II software.
You can reserve DQSn pin on the board and implement differential DQSn mode in your design when the future version of the core starts supporting it.