Patent ID: 6862210

Claim:
A magnetic random access memory comprising: a memory cell including a magneto-resistive element of which electrical resistance is altered by magnetism; a sub-bit line which is connected to one end of the memory cell; a main-bit line which is connected to the sub-bit line via a first selection circuit; a sense-amplifier which is connected to the main-bit line via a second selection circuit; a wiring line which is connected to the other end of the memory cell and disposed in a first direction; a first operation circuit which is connected to one end of the wiring line via a third selection circuit; a second operation circuit which is connected to the other end of the wiring line; and a word line which passes through an interconnection point between the memory cell and the wiring line and is disposed orthogonal to the first direction, wherein: during a read-out operation of reading out data from the memory cell, the first operation circuit acts as a word line driver so that the wiring line may provide a read-out word line; and during a write-in operation of writing data into the memory cell, the first operation circuit acts as either one of a bit line driver and a bit line sinker and the second operation circuit acts as the other of the either one of the bit line driver and the bit line sinker so that the wiring line may provide a write-in bit line.