Patent ID: 6510495
Filing Date: 2003-01-21
Classification: G06F

Abstract:
A method for writing data into a nonvolatile memory that allows data deletion in block units, comprising the steps of:storing identification information of a block to which data stored in a cache memory having an access speed faster than said nonvolatile memory belongs; when writing data into said nonvolatile memory, determining whether the data stored in said cache memory is to be transferred to a corresponding area in said nonvolatile memory based on a comparison of an identification information for a block to which the data being written belongs and the stored identification information; and when the identification information of the block to which the data being written belongs is different from the stored identification information, transferring the data stored in said cache memory to the corresponding area in said nonvolatile memory using the result of the comparison of the identification informations as a trigger for the transfer.