×

Memory system and control method thereof

  • US 8,015,347 B2
  • Filed: 09/02/2009
  • Issued: 09/06/2011
  • Est. Priority Date: 12/28/2007
  • Status: Active Grant
First Claim
Patent Images

1. A memory system comprising:

  • a nonvolatile memory including a plurality of blocks as data erase units;

    a measuring unit which measures an erase time at which data of each block is erased;

    a block controller which writes data supplied from at least an exterior into a first block which is set in a free state and whose erase time is oldest, wherein the block controller has a block table indicating a correspondence relation between a status value indicating one of a free state and an in-use state and the erase time for each block; and

    a first selector which selects the first block based on information of the block table.

View all claims
  • 5 Assignments
Timeline View
Assignment View
    ×
    ×