For V-series Families, VHDL is Not Supported When Read DQS Tracking is Enabled

Description

This problem affects DDR2 and DDR3 products.

In version 11.1 SP1, when using Arria V, Cyclone V, or Stratix V device families, VHDL is not supported if the Read DQS Tracking feature is enabled.

Resolution

There is no workaround for this issue. This issue will be fixed in a future version.