A MEMORY SYSTEM WITH A SEMICONDUCTOR MEMORY DEVICE

摘要

PURPOSE: A memory system with a semiconductor memory device is provided to carry out 8 data memory. CONSTITUTION: An address management is performed with the logical block unit of the m bit which is bigger than a n and marked in the exponentiation of 2. The n bit part continued from the head address corresponds to the physical block of the memory device. The rest part of number is integrated in a second management unit, and corresponds to the physical block or the memory device. A semiconductor memory saves 3 bit/8 data of a cell. The memory cell array is comprised as arranging NAND string including serially connected nonvolatile memory cells.