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Method for operating a NAND flash memory device in multiple operational modes

  • US 8,687,422 B2
  • Filed: 01/24/2012
  • Issued: 04/01/2014
  • Est. Priority Date: 10/17/2007
  • Status: Active Grant
First Claim
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1. A method of operating a NAND flash memory device, comprising:

  • setting a special mode enable bit in a special mode enable register of a flash memory device to cause the flash memory device to exit an ordinary operational mode and to enter a special operational mode, the ordinary operational mode and the special operational mode having a plurality of shared commands associated therewith, wherein each of the plurality of shared commands is associated with performing an ordinary operation for the ordinary operational mode and a respective special operation for the special operational mode;

    performing one of the respective special operations in the special operational mode by issuing one of the plurality of shared commands; and

    resetting the special mode enable bit in the special mode enable register of the flash memory device to cause the flash memory device to exit the special operational mode and to re-enter the ordinary operational mode.

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