Data storage method and data processing device using an erasure block buffer and write buffer for writing and erasing data in memory

摘要

A data processing device includes flash memory 101; nonvolatile memory 102 having an erasure block buffer 103 in which there are stored data recorded in an erasure-unit region of the flash memory 101; a write controller 111 for writing into the erasure block buffer 103 write request data which are to be written into the flash memory 101; a save unit 112 for saving non-changing data stored in the flash memory 101 to the erasure block buffer 103; an erasure instruction unit 301 for instructing erasure of the data from the erasure-unit region of flash memory 101; and a write unit for writing the data recorded in the erasure block buffer 103 to the flash memory 101. A comparison may be made between the erasure unit regions into which first and second write data are to be written. The data processing device may further include a write buffer for storing write data.