Memory controllers, memory systems, and memory modules

A memory system comprising:

• a memory module including a plurality of data chips, a first parity chip, and a second parity chip;
• and
• a memory controller configured to control the memory module and including:
• an error correction code (ECC) engine;
• a central processing unit (CPU) configured to control the ECC engine;
• and
• an error managing circuit,
• wherein the ECC engine is configured to:
• during a read operation, perform an ECC decoding on a read codeword set received from the memory module to generate a first syndrome and a second syndrome,
• wherein the read codeword set includes a user data set, the second syndrome is associated with a correctable error, and the user data set includes the correctable error;
• correct the correctable error in the user data set based on the first syndrome and the second syndrome;
• and
• provide the second syndrome to the error managing circuit, and
• wherein the error managing circuit is configured to:
• obtain second syndromes associated with a plurality of correctable errors through a plurality of read operations;
• accumulate the second syndromes as a plurality of second syndromes;
• store the plurality of second syndromes;
• compare the plurality of second syndromes with at least one error pattern set;
• and
• predict an occurrence of an uncorrectable error in a memory region of the plurality of data chips associated with the plurality of correctable errors based on the comparison.

A memory module comprising:

• a plurality of data chips configured to store a user data set and meta data;
• a first parity chip and a second parity chip configured to store first parity data and second parity data, respectively, the first parity data and the second parity data being generated based on the user data set and the meta data;
• and
• a buffer chip configured to provide the user data set and the meta data to the plurality of data chips based on a command and an address provided from an external memory controller and further configured to provide the first parity data and the second parity data to the first parity chip and the second parity chip, respectively,
• wherein the buffer chip includes:
• an error correction code (ECC) engine;
• a memory management unit configured to control the ECC engine;
• and
• an error managing circuit,
• wherein the ECC engine is configured to:
• during a read operation, perform an ECC decoding on a read codeword set received from the memory module to generate a first syndrome and a second syndrome,
• wherein the read codeword set includes the user data set, the second syndrome is associated with a correctable error, and the user data set includes the correctable error;
• correct the correctable error in the user data set based on the first syndrome and the second syndrome;
• and
• provide the second syndrome to the error managing circuit, and
• wherein the error managing circuit is configured to:
• obtain second syndromes associated with a plurality of correctable errors through a plurality of read operations;
• accumulate the second syndromes as a plurality of second syndromes;
• store the plurality of second syndromes;
• compare the plurality of second syndromes with at least one error pattern set;
• and
• predict an occurrence of an uncorrectable error in a memory region of the plurality of data chips associated with the correctable error based on the comparison.