Non-volatile memory device, memory controller, and methods thereof

PURPOSE: A nonvolatile memory device, a memory controller, and operating methods thereof are provided to adaptively perform a wear-leveling according to the deterioration degree of a flash memory cell. CONSTITUTION: An erase command and a block address outputted from a controller are received. A parameter value related to an erase operation is changed until an erase operation is completed in a block corresponding to the block address according to the erase command. Information corresponding to the finally changed parameter value is stored. The information is transmitted to the controller according to a command outputted from the controller. An erase operation and an erase verification operation are performed during block erase time(32). A nonvolatile memory device transmits status register data with a write status bit to a memory controller(34).