In the DDR3 SDRAM Controllers with ALTMEMPHY IP MegaCore® functions version 10.1 and earlier, the controller provides automatic derating based on the AC175 threshold. Memory devices faster than 533 MHz require derating based on the AC150 threshold.
This issue affects all configurations using memory devices faster than 533 MHz.
This issue can result in inaccurate timing analysis.
This issue is fixed in the DDR3 SDRAM Controllers with ALTMEMPHY IP MegaCore function version 11.0 .