Method for applying downgraded DRAM to an electronic device and the electronic device thereof
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United States of America Patent
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Issued Date -
May 25, 2006
app pub date -
May 13, 2005
filing date -
Nov 24, 2004
priority date (Note) -
Abandoned
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Abstract
An electronic device applying downgraded DRAM comprises a processing unit, a downgraded DRAM and a non-volatile memory. The processing unit is used for executing operations of the electronic device. The downgraded DRAM is provided for the processing unit to store program code and data temporarily, and the downgraded DRAM includes usable and unusable memory blocks. The non-volatile memory is used for storing a usable DRAM map that records the usable memory blocks of the downgraded DRAM, and the processing unit accesses the usable memory blocks of the downgraded DRAM according to the usable DRAM map. A method for applying downgraded DRAM to the electronic device is also disclosed, which can simplify the preprocessing of the downgraded DRAM and assembly procedure of the electronic device and thus reduces production cost.
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