Patent ID: 8089818
Filing Date: 2012-01-03
Classification: G11C

Abstract:
1. A nonvolatile semiconductor memory device comprising: a cell array including a plurality of MATs (unit cell array) disposed in a matrix, the MATs each including a plurality of first lines, a plurality of second lines crossing the first lines, and memory cells which include a variable resistive element, the memory cells being connected between the first and second lines at intersections of the first and second lines, capable of electrical rewriting, and adapted to store a resistance value as data in a nonvolatile manner; a data latch provided to hold write data for the memory cells of each MAT, or read data from the memory cells; and a first and a second drive circuit provided to select the first and second lines connected to the memory cells of each MAT that are to be accessed, and to drive the selected first and second lines therebetween to write or read the data, the memory cells forming a page by being connected to each first line selected from the MATs, the data latch latching the write data or the read data in units of pages, and the first drive circuit and the second drive circuit driving the first and second lines multiple times to write or read data for one page in and out of the cell array.