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Non-volatile memory device and data storing method

  • US 6,731,537 B2
  • Filed: 02/26/2002
  • Issued: 05/04/2004
  • Est. Priority Date: 09/12/2001
  • Status: Expired due to Term
First Claim
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1. A non-volatile storage device comprising;

  • a controller, a buffer memory, and a non-volatile memory, wherein said buffer memory comprises a plurality of banks, and wherein, in response to control information from an external unit, said controller stores first data, which is entered from the external unit, sequentially into the banks of said buffer memory and then further stores the stored data into a specified area of said non-volatile memory and, concurrently with the storage of data into said non-volatile memory, stores second data, which is entered from the external unit, into a bank of said buffer memory from which data has been transferred to said non-volatile memory;

    a status register or a status flag indicating a completion/incompletion of the data transfer from said buffer memory to said non-volatile memory, the status register or status flag being controlled by said controller and indicating, for each bank, the completion/incompletion of the data transfer to said non-volatile memory;

    a first register containing information on a bank into which data is being entered from the external unit; and

    a second register containing information on a bank from which data is being transferred from said buffer memory to said non-volatile memory, wherein said controller judges the completion/incompletion of the data transfer to or from each bank, based on the bank information in said first register and said second register, to control said status register or said status flag.

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