Patent ID: 6507520
Filing Date: 2003-01-14
Classification: G11C

Abstract:
A nonvolatile memory system comprising:a control device; and a nonvolatile memory device; wherein said control device supplies a plurality of commands to said nonvolatile memory device, said commands comprising a first command and a second command, wherein said nonvolatile memory device comprises a plurality of word lines, a plurality of memory cells for storing data and a plurality of data latches for temporarily storing write data from outside of the memory device, wherein each of said word lines connects to part of said plurality of memory cells, wherein, when said control device issues said first command, a first command process is carried out in which said control device supplies address information and first data, said nonvolatile memory device stores said first data to said data latches, selects one word line corresponding to said address information and stores said first data in said data latches to memory cells connected with said selected word line, and wherein, when said control device issues said second command, a second command process is out in which said control device supplies said address information and second data, said nonvolatile memory device selects one word line corresponding to said address information, reads out data stored in memory cells connected with said selected word line to said data latches, stores said second data to part of said data latches and stores data in said data latches to said memory cells connected with said selected word line.