Non-volatile semiconductor memory device non-volatile semiconductor memory device for sector protection circuit, and sector protection method,

摘要

A nonvolatile storage for storing data indicating whether the protection status of the sector to sector group for each sector or each sector protection circuit of the present invention means the presence or absence of the protection status of the sector to sector group for each sector or each I and a volatile storage for storing data. Typically, to protect the sector or group that sector when the data indicating the protection sector or a sector group in at least one of said volatile storage unit and the non-volatile storage unit is stored. In this state, upon receiving a predetermined command, and only valid data of the volatile storage unit.