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AR# 31501

MIG v2.2, Virtex-4 RLDRAM II - Removal of configuration register support


The MIG documentation on the Virtex-4 RLDRAM design lists support for the configuration register. Due to problems with this design, utilizing the configuration register is not supported. Support of this feature was removed from the MIG documentation starting with MIG 2.3. This issue exists in all Virtex-4 RLDRAM II designs.


When the configuration register is accessed from the testbench, the RLDRAM II controller processes the MRS command, but does not process the mode register values or send them to memory. The configuration register should not be used with the Virtex-4 RLDRAM II design.
AR# 31501
Date Created 08/21/2008
Last Updated 05/23/2014
Status Archive
Type General Article
  • Virtex-4 FX
  • Virtex-4 LX
  • Virtex-4 SX
  • MIG