Memory device and method reading data

A memory device comprising:

• a memory chip including memory cells;
• and
• a logic chip configured to control the memory chip,
• wherein the logic chip is configured to read a codeword including N data units from the memory chip, and perform error correction decoding on the codeword to correct errors in M data units of the N data units, such that when the M data units do not correspond to a data corruption pattern, the logic chip is configured to correct the errors of the M data units, and when the M data units correspond to the data corruption pattern, the logic chip is configured to process the errors of the M data units as an uncorrectable error,
• N is a positive integer, and
• M is a positive integer less than N.

A method for reading data from a memory device including memory cells, the method comprising:

• reading a codeword from the memory cells;
• correcting errors when a number of the errors in the codeword is less than a maximum number of correctable errors;
• correcting errors when the number of errors in the codeword is equal to the maximum number of correctable errors and the errors correspond to a same sub-word line;
• and
• outputting signal indicating that the errors are an uncorrectable error when the number of errors of the codeword is equal to the maximum number of correctable errors and the errors correspond to different sub-word lines.