NONVOLATILE MEMORY DEVICEM NONVOLATILE MEMORY SYSTEM INCLUDING NONVOLATILE MEMORY DEVICE AND OPERATING METHOD OF NONVOLATILE MEMORY SYSTEM

摘要

A method of operating a memory system including a plurality of memory cells according to an embodiment of the present invention includes changing an operation mode of some of the plurality of memory cells operating based on a first operation mode to a second operation mode; And when the operation mode is changed, performing a change erase operation on memory cells in which the operation mode is changed based on a change erase condition, and when the operation mode is operated, based on a first erase condition when operating in the first operation mode. A normal erase operation is performed, and when the second operation mode is operated, a normal erase operation is performed based on a second erase condition, and the changed erase condition is different from at least one of the first and second erase conditions. to be.