Memory, memory system, and operation method of memory

A memory system, comprising:

• a memory controller which comprises:
• a downlink error correction code generation circuit suitable for generating a downlink error correction code based on data to be transferred to a memory;
• and
• the memory which comprises:
• a downlink error correction circuit suitable for correcting an error in data transferred from the memory controller based on the downlink error correction code transferred from the memory controller to produce an error-correction-operation-performed data;
• a memory error correction code generation circuit suitable for generating a memory error correction code based on the error-correction-operation-performed data obtained by the downlink error correction circuit;
• an error injection circuit suitable for injecting an error into at least one among the error-correction-operation-performed data obtained by the downlink error correction circuit and the memory error correction code when an uncorrectable error in the data transferred from the memory controller is detected by the downlink error correction circuit;
• a memory core suitable for storing the error-correction-operation-performed data and the memory error correction code transferred from the error injection circuit;
• and
• a memory error correction circuit suitable for correcting an error of the data read from the memory core based on the memory error correction code read from the memory core, and notifying, when an uncorrectable error is detected in the data read from the memory core, the memory controller of the detection of the uncorrectable error,
• wherein an amount of the error injected by the error injection circuit is greater than the memory error correction circuit can correct.

A method for operating a memory, comprising:

• receiving data and a downlink error correction code;
• performing a first error correction operation for correcting an error of the data based on the downlink error correction code to produce an error-correction-operation-performed data;
• detecting an uncorrectable error in the data through the first error correction operation;
• generating a memory error correction code based on the error corrected data;
• injecting an error into at least one among the error-correction-operation-performed data and the memory error correction code in response to the detection of the uncorrectable error and transferring the data and the memory error correction code to a memory core after the injecting;
• writing the data and the memory error correction code transferred to the memory core into the memory core,
• reading the data and the memory error correction code from the memory core;
• performing a second error correction operation for correcting an error of the data read from the memory core based on the memory error correction code read from the memory core;
• and
• detecting an uncorrectable error in the data through the second error correction operation, and notifying the memory controller of the detection of the uncorrectable error
• wherein an amount of the error injected into at least one of the error-correction-operation-performed data and the memory error correction code is greater than the second error correction operation can correct.

An operating method of a memory system, the operating method comprising:

• generating a first error-correction code based on first data;
• performing a first error-correction operation on the first data, which experiences a medium, based on the first error-correction code to generate second data;
• generating a second error-correction code based on the second data;
• injecting, when the second data includes an original error that is not corrected through the first error-correction operation, an intentional error into at least one of the second data and the second error-correction code;
• storing, into a memory core, the second data and the second error-correction code;
• and
• identifying the original error by detecting the intentional error through a second error-correction operation, which is performed on the second data based on the second error-correction code read out from the memory core together with the second data,
• wherein an amount of the intentional error is greater than the second error-correction operation can correct.