Flash memory device and memory system including the same

A memory system comprising:

• a flash memory device configured to store user data and a plurality of pieces of configuration data indicative of operation parameter values at temperature levels set according to predetermined temperature sections or discrete temperatures;
• a temperature sensing unit configured to measure an ambient temperature of the flash memory device and to generate temperature level data;
• and
• a memory controller configured to receive the temperature level data from the temperature sensing unit, to access the flash memory device at an address derived from the temperature level data received from the temperature sensing unit, to read one piece of configuration data corresponding to the temperature level data among the plurality of pieces of configuration data at the address of the flash memory device, and to set operation parameter values using the read piece of configuration data.

A memory device comprising:

• a temperature sensing unit configured to measure an ambient temperature of the memory device and to generate temperature level data;
• a flash memory array including a user data area comprising multilevel cell (MLC) memory cells and storing user data, and a configuration data area storing a plurality of pieces of configuration data indicative of respective read parameters of a read operation of the MLC memory cells, the plurality of pieces of configuration data corresponding to respectively different measured ambient temperatures of the memory device;
• and
• a control unit configured to receive the temperature level data from the temperature sensing unit, and to execute a read operation of the MLC memory cells using a read parameter indicated by a piece of configuration data corresponding to the temperature level data among the plurality of pieces of configuration data,
• wherein the control unit includes a mapping table which maps the temperature level data to an address of the memory cell array of the piece of configuration data corresponding to the temperature level data.