FLASH BACKED DRAM MODULE INCLUDING LOGIC FOR ISOLATING THE DRAM
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United States of America Patent
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app pub date -
Apr 6, 2012
filing date -
Feb 11, 2009
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Abandoned
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Abstract
A memory device for use with a primary power source including: non-volatile memory; volatile memory; an interface for connecting to a backup power source; isolation logic for controlling access to the volatile memory by a host processor, said isolation logic having a first mode during which the isolation logic provides the host processor with access to the volatile memory for storing or reading data and a second mode during which the isolation logic isolates the volatile memory from access by the host processor; and a controller controlling the isolation logic, said controller programmed to place the isolation logic in the first mode when the volatile memory is being powered by the primary power source and, when power to the volatile memory from the primary power source is interrupted, to place the isolation logic in the second mode and transfer data from the volatile memory to the non-volatile memory.
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