MULTI-BIT FLASH MEMORY DEVICE AND METHOD OF ANALYZING FLAG CELLS OF THE SAME

摘要

Disclosed is a multi-bit flash memory device which includes a memory cell array and a control circuit. The memory cell array has multiple memory cells and multiple flag cells. The control circuit determines whether the flag cells are programmed, based on a reference corresponding to a read margin of the flag cells, and controls a program operation of the memory cells in response to the determination.