Non-volatile storage device and control method thereof

摘要

A memory card (100) is comprised of: a flash memory (120) that includes a plurality of physical blocks (122) made up of a plurality of pages for storing data and a page register (121) that holds data to be written to a page; and a controller (110) that specifies and erases an invalid physical block with reference to a valid block table (114) indicating whether valid data is stored in each of the physical blocks (122), when data is written, and that transfers, at the same time, the data to be written to the page register (121) while carrying out said erasure.