METHOD FOR OPERATING MEMORY CONTROLLER AND SYSTEM HAVING THE SAME

摘要

A method for operating a memory controller, which controls the operation of a nonvolatile memory device comprising a memory area including multi level cells (MLCs), comprises the steps of: receiving an address of the memory area which is to be accessed and data which is to be programmed in the memory area; analyzing access history information for the memory area based on the address; generating a first mapping data corresponding to the data based on the analysis result, or generating a second mapping data based on the data and previous mapping data previously programmed in the MLCs; and transmitting a program command including one of the first and the second mapping data to the nonvolatile memory device. [Reference numerals] (S320) Program a first mapping data corresponding to a first data to MLCs; (S340) Read the first mapping data stored in the MLCs; (S350) Transmit a second mapping data selected on the basis of a second data and the first mapping data; (S360) Overwrite the second mapping data on the first mapping data