Memory system, memory controller and memory for the same, and method of constructing signal of the same

The present invention discloses a memory system, the memory controller for the system and a memory, and how the signal configuration of the system. The system memory controller, and signals of the packet format that, but transmits a signal of a packet type, the minimum Hamming distance between the write command and the different command is set in response to the command signal included in the signal so that they are at least 2 It consists of a receiving memory.