Resistnace variable memory device and memory system performing flexible program method
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The present invention relates to a resistance variable memory device to perform flexible programming operation. A resistance variable memory device includes a memory cell array having a plurality of memory cells according to the invention; A storage device for storing the background information; And a control circuit for programming a memory cell selected from said plurality of memory cells during the erase and program operations in the background data for the plurality of memory cells with the program data according to the background information. A resistance variable memory device in accordance with the present invention to erase data in the background memory cells at the time of erasing operation, and only a specific program data in the program operation. According to the invention, the faster the speed the program in the program operation significantly. In addition, the present invention can be compatible with a flash memory.