Method of operating memory controller and semiconductor storage device including memory controller

A method of operating a memory controller for controlling a non-volatile memory device, the method comprising:

• receiving an operation command from a host;
• determining whether to limit a performance level of the memory controller based on lifetime information of the memory controller, the determining including,
• determining whether a using time included in using time information generated by counting an operation execution time of the memory controller is equal to or greater than a reference using time included in reference using time information, and
• determining whether a lifetime included in the lifetime information is equal to or less than a reference lifetime included in reference lifetime information;
• controlling the performance level of the memory controller based on a result of the determining;
• and
• performing an operation corresponding to the operation command at the performance level.

A semiconductor storage device comprising:

• a non-volatile memory device;
• and
• a memory controller configured to control the non-volatile memory device according to a command from a host, the memory controller including,
• a host interface configured to exchange at least one of commands and data with a host,
• an information buffer configured to store state information, the state information including lifetime information of the memory controller and performance information of the memory controller, and
• a processor configured to receive the state information from the information buffer and control a performance level of the memory controller based on the state information thereof and an expected using time thereof.