EMULATED ELECTRICALLY ERASABLE MEMORY HAVING SECTOR MANAGEMENT

摘要

A semiconductor memory device comprises a volatile memory and a non-volatile memory including a plurality of sectors. Each of the plurality of sectors configured to store a sector status indicator and a plurality of data records. A control module is coupled to the non-volatile memory and the volatile memory. The control module manages the sectors by scanning the sectors to identify the records with invalid data; changing the status indicator of a particular sector when all of the records in the particular sector are invalid, and discontinuing scanning the particular sector while all of the records in the particular sector are invalid.