Data coding device, memory controller, and storage device

A storage device comprising:

• a memory device;
• a pump voltage generator configured to externally supply a pump voltage to the memory device;
• and
• a memory controller configured to provide conversion data obtained by converting data received from an external host to the memory device,
• wherein the memory controller is configured to:
• receive raw data having a total number of bits is 2N,
• invert and output the raw data according to a comparison result with previous data output before the raw data when a number of reference data bits included in the raw data is N, and
• output the conversion data by inverting the raw data according to the number of reference data bits included in the raw data when the number of reference data bits included in the raw data is not N, and
• wherein the pump voltage generator receives a ready busy signal from the memory device.