NAND FLASH MEMORY DEVICE PERFORMING ERROR DETECTION AND DATA RELOADING OPERATION DURING COPY BACK PROGRAM OPERATION

摘要

A NAND flash memory device is provided to perform error detection and data reloading processes during a copy back program process by selecting a bit error while data is read from a source page. A NAND flash memory device includes a cell array(110), a parity cell array(210), and a parity generating and parity column selecting circuit(230). The cell array is divided into plural planes. The parity cell array is divided into plural parity planes, which store parities for the respective planes. The parity generating and parity column selecting circuit generates a new parity for a reloaded data from the outside during a copy back program process and stores the new parity on a parity plane, which corresponds to a plane, on which the reloaded data is stored.