OVER WRITABLE NONVOLATILE MEMORY DEVICE AND DATA WRITE METHOD THEREOF

摘要

PURPOSE: A non-volatile memory device and data writing method thereof are provided to generate parity corresponding to overwriting data and to overwrite a memory. CONSTITUTION: It is determined whether to decode a program command(S120). If a command is determined as an overwriting command, data in cell area is read out(S150). A parity bit is generated by combining overwriting data(S160). Overwriting data and parity bit are written in a cell area(S170).