NONVOLATILE SEMICONDUCTOR MEMORY DEVICE, METHOD FOR DATA UPDATING THEREOF, AND NONVOLATILE SEMICONDUCTOR MEMORY SYSTEM

摘要

PURPOSE: A nonvolatile semiconductor memory device, update method thereof, and nonvolatile semiconductor memory system are provided to reduce data update time of the nonvolatile semiconductor memory device by reducing an external processing time when updating data of nonvolatile semiconductor memory device. CONSTITUTION: A data is stored in a memory area. A RAM(4) duplicates the data stored in the memory area. A controller(3) controls the memory area and the RAM. The controller performs data updating operation including pre-program operation, erase operation, and a post-program operation.