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NON-VOLATILE STORAGE DEVICE, INFORMATION PROCESSING SYSTEM AND WRITE CONTROL METHOD OF NON-VOLATILE STORAGE DEVICE

  • US 20120155167A1
  • Filed: 08/02/2011
  • Published: 06/21/2012
  • Est. Priority Date: 12/21/2010
  • Status: Abandoned Application
First Claim
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1. A non-volatile storage device comprising:

  • a non-volatile memory capable of changing the number of bits written to a memory cell;

    a capacity determination module configured to determine whether a first data amount stored in the non-volatile memory exceeds a first threshold value;

    an area dividing determination module configured to provide a first storage area in the non-volatile memory for writing single bit data to a first set of memory cells and a second storage area in the non-volatile memory for writing multiple bit data to a second set of memory cells;

    a first write controller configured to write data to the first storage area using a first writing mode until the capacity determination module determines that the first threshold value has been exceeded;

    a data selector configured to select a first subset of data from the data stored in the first storage area, wherein the first subset of data is associated with a frequency of access less than a predetermined reference value when the capacity determination module determines that the first threshold value has been exceeded; and

    a second write controller configured to temporarily save the first subset of data for writing to the second storage area using a second writing mode.

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