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    • 3. 发明专利
    • DIRECTED AUTO-REFRESH SYNCHRONIZATION
    • IL184020D0
    • 2007-10-31
    • IL18402007
    • 2007-06-18
    • QUALCOMM INC
    • G11C20100101
    • In a directed auto-refresh (DARF) mode, refresh commands are issued by a controller, and refresh row and bank addresses are maintained internally to a memory Module. A bank address counter internal to the memory is initialized to a first pre-determined value upon entering DARF mode. The memory refreshes the currently addressed bank in response to a DARF command, and increments the bank address counter in a predetermined sequence. The controller tracks the bank address, and may issue one or more memory access commands while a DARF operation is being performed, if the memory access and the refresh are directed to different banks. Upon exiting a self-refresh mode, the bank address counter assumes a second predetermined value. The second pre-determined value may be fixed, or may be n+1, where n is the value of the bank address counter when self-refresh mode is initiated.