Patent ID: 7130217

Claim:
A method of accessing a nonvolatile semiconductor memory device including a nonvolatile memory cell array having first and second pages, the nonvolatile semiconductor memory device further including a latch circuit coupled to the memory cell array, the method comprising; supplying a first command, a first address for the first page, and a second command to cause transfer of first and second chunks of data stored in the first page to the latch circuit, supplying a third command, a second address for the second page, and a superseding data to the nonvolatile semiconductor memory device to replace the second chunk of data in the latch circuit with the superseding data while allowing the first chunk of data read from the first page to stay unchanged in the latch circuit; and after supplying the superseding data, supplying a fourth command to initiate programming into the second page based on the superseding data and the first chunk of data in the latch, wherein the first chunk of data is stored in a data area of the second page and the second chunk of data is stored in a redundant area of the second page.