One embodiment sets forth an interface circuit configured to manage refresh command sequences that includes a system interface adapted to receive a refresh command from a memory controller, clock frequency detection circuitry configured to determine the timing for issuing staggered refresh commands to...http://www.google.co.uk/patents/US20080028137?utm_source=gb-gplus-sharePatent US20080028137 - Method and Apparatus For Refresh Management of Memory Modules
