| 摘要 |
Power consumption of a mobile communication device is reduced by disabling refreshing of unused portions of DRAM. DRAM includes multiple separately refreshable memory refresh ranges (MRRs). A memory refresh manager (MRM) within the device's operating system identifies ranges of virtual memory (305) that will not be used during subsequent sleep mode operation. The MRM (307) remaps virtual to physical memory space to conglomerate the physical memory pages (associated with virtual memory that will not be used) in certain MRRs such that the contents of entire MRRs need not be maintained in sleep mode (308). Information in any remapped physical page that needs to be maintained during sleep mode is copied so that it resides at the same virtual address after the remapping as before. Other software operates in virtual memory space and is not affected by the remapping (309). Refreshing of the certain MRRs is then disabled for sleep mode (310), thereby reducing power consumption.
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