Semiconductor memory device and method of operating the same

摘要

A semiconductor memory device includes memory blocks each including a plurality of groups of memory cells programmable in multiple levels and a control circuit configured to make a determination of whether a specific memory block treated a bad block, from among the memory blocks, is programmable in a single level and to control the specific memory block according to a result of the determination so that the specific memory block is usable as a single level cell block.