Nonvolatile memory device and method of operating the same

A nonvolatile memory device, comprising:

• a nonvolatile memory;
• a buffer memory configured to store a plurality of read data transmitted from the nonvolatile memory;
• an error detection and correction circuit configured to detect an error in partial data of each of the plurality of read data and judging whether the partial data is correctable or not on the basis of the detected error;
• and
• a controller configured to analyze the uncorrectable partial data with respect to the plurality of read data to determine a representative value, and to transmit the representative value to the error detection and correction circuit,
• wherein the plurality of read data is read through a read operation with respect to a same page.

A method of operating a nonvolatile memory device, the method comprising:

• detecting an error in partial data of each of a plurality of read data;
• judging whether each partial data is correctable or not on the basis of the corresponding detected error;
• analyzing the partial data with respect to the plurality of read data to determine a representative value if the partial data is uncorrectable;
• and
• restoring an error bit of the uncorrectable partial data by using the representative value,
• wherein the plurality of read data is read through a read operation with respect to a same page, and
• wherein the detecting and judging is repeatedly performed on each of the plurality of read data.

A nonvolatile memory device, comprising:

• a nonvolatile memory;
• a memory interface configured to read data from a same word line of the nonvolatile memory a number N times to generate N instances of the read data, wherein N is at least two, and each of the instances comprises a plurality of sectors;
• an error detection unit configured to detect whether a same sector in all the instances is uncorrectable;
• a controller configured to determine a representative value from all the instances of the uncorrectable sector and output the representative value;
• and
• an error correction unit configured to correct the uncorrectable sector by using the representative value.