Memory controller, memory system including the memory controller, and operating method performed by the memory controller

A memory controller comprising:

• a decoder for decoding a packet and generating a command and an address that corresponds to the command;
• a first queue for storing the command and the address;
• a content addressable memory (CAM) for detecting a fail of a first address that corresponds to a first command, and when the first address is detected as a fail address, for outputting a second address and a second command to the first queue, wherein the second address is obtained by remapping the first address, and the second command corresponds to the second address;
• and
• a controller input/output (controller I/O) for outputting the command and the address stored in the first queue.

A memory controller comprising:

• a decoder configured to decode a packet and generate a command and an address that corresponds to the command;
• a content addressable memory (CAM) configured to:
• store address information of a defective cell of a semiconductor memory device,
• detect a fail of the address by comparing the address with the address information of the defective cell, and
• according to a result of the detecting, output a remapping address;
• and
• a queue configured to queue the command and the address that corresponds to the command, regardless of the result of the detecting, and additionally configured to queue the remapping address when the address corresponds to a fail address.

A method for a memory device, the method comprising:

• receiving a first command and a first address corresponding to the first command;
• determining whether the first address corresponds to a fail address and concurrently storing the first command and first address in a queue;
• when the first address corresponds to a fail address, storing a second address in the queue, the second address corresponding to the first address in the queue;
• and
• when the first address does not correspond to a fail address, using the first address for the first command.