Semiconductor memory device and method of controlling the same

摘要

A semiconductor memory device includes a plurality of detecting code generators configured to generate a plurality of detecting codes to detect errors in a plurality of data items, respectively, a plurality of first correcting code generators configured to generate a plurality of first correcting codes to correct errors in a plurality of first data blocks, respectively, each of the first data blocks containing one of the data items and a corresponding detecting code, a second correcting code generators configured to generate a second correcting code to correct errors in a second data block, the second data block containing the first data blocks, and a semiconductor memory configured to nonvolatilely store the second data block, the first correcting codes, and the second correcting code.

主权项

1. A storage device comprising:
a nonvolatile semiconductor memory configured to store a plurality of detecting codes to detect an error in a plurality of data items, respectively, a plurality of first correcting codes to correct an error in a plurality of first data blocks, respectively, each of the first data blocks comprising one of the data items and a corresponding detecting code, a second correcting code to correct an error in a second data block which comprises the first data blocks, and the second data block; a first corrector configured to correct an error in the first data blocks using the first correcting codes, respectively; a detector configured to detect an error in the data items corrected by the first corrector using the detecting codes, respectively; and a second corrector configured to correct an error in a data item containing the error of the corrected data items using the second correcting code.