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MIG 7 Series QDRII+ - All Burst Length 2 (BL=2) designs will fail calibration when using ISIM
Version Found: v1.5
Version Resolved and other Known Issues: See (Xilinx Answer 45195).
All MIG 7 Series QDRII+ BL=2 designs will fail calibration when using ISIM as a result of the read commands being issued incorrectly. This issue only affects ISIM and works correctly with Modelsim.
There currently is no workaround available. Please use ModelSim if available, otherwise open a Webcase with Xilinx Technical Support.
07/25/2012 - Initial release of Answer Record