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; nonvolatile memory having an erasure block buffer in which there are stored data recorded in an erasure-unit region of the flash memory; a write control controller for writing into the erasure block buffer write request data, which are to be written into the flash memory; a save unit for saving non-changing data stored in the flash memory to the erasure block buffer; an erasure instruction unit for instructing erasure of the data from the flash memory; and a write unit for writing the data recorded in the erasure block buffer to the flash memory.