Flash memory device and data processing method thereof

Abstract

The invention discloses a flash memory device and a data processing method thereof. The method includes presetting a wear redundancy value, namely the maximum value of difference of numbers of erasing times of different blocks of the flash memory device, of the blocks in the flash memory device to be N; establishing erasing counting tables EC(X) containing N+1 elements, setting a subscript value X to range from 0 to N, and arraying the N+1 elements from small to large according to the subscript value X; dividing all available blocks in the flash memory device into N+1 queues according to erasing counting values, adding the queues composed of the blocks with the erasing counting values to be zero into the EC (0), and allowing the queues contained by elements EC (1) to EC (N) to be empty; when writing the data, determining the minimum queue to be the one with the minimum erasing counting value but not empty in the erasing counting tables, and writing the data into the blocks of the minimum queue. The device and method has the advantages that wear balance of the blocks can be realized during data writing and deleting, and the purpose of prolonging service life can be achieved.

Description

technical field [0001] The present invention relates to the technical field of flash memory in the communication field, and in particular, to a data processing method of a flash memory device and a flash memory device. Background technique [0002] A flash memory device is an erasable and rewritable electronic non-volatile storage medium, which has been widely used in data storage systems. Because the flash memory device can still save data when the power is off, it is usually used to save preset information, such as the computer's BIOS (basic program), PDA (personal digital assistant), digital camera to save data, etc. Better storage solution, which is still evident in low-capacity applications not exceeding 4GB. [0003] The flash memory device performs erasing and writing operations in units of blocks. The writing operation of the flash memory must be performed in a blank area. If the target area already has data, it must be erased first and then written. Therefore, the ...

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