Patent ID: 7602643

Claim:
A data read method performed by a non-volatile memory device including a plurality of sectors, each of the sectors including at least one non-volatile memory cell, the method comprising: sequentially erasing data of a plurality of sectors, which are to be erased; and if a read command instructing reading of a sector that is to be read is received while the plurality of sectors, which are to be erased, are being erased, reading data of the sector that is to be read while the plurality of sectors, which are to be erased, are being erased, wherein, during the reading of the data of the sector that is to be read, if the sector that is to be read belongs to a bank including an erased sector from which data is already erased, the data of the sector that is to be read is read while the plurality of sectors, which are to be erased, are being erased.