Patent ID: 8717839

Claim:
A device comprising: first and second current path lines each including at least one penetration electrode penetrating through a semiconductor substrate; first and second latch circuits coupled to the first and second current path lines, respectively; a driver circuit supplying first and second data to the first and second latch circuits, respectively, the second data representing a logical value opposite to a logical value of the first data; a control circuit controlling the driver circuit so that first and second periods are alternately repeated, the driver circuit supplying the first data to the first latch circuit without supplying the second data to the second latch circuit in the first period, and the driver circuit supplying the second data to the second latch circuit without supplying the first data to the first latch circuit in the second period; and a monitor circuit determining whether a logical value of a potential of the first current path line in the second period is equal to the logical value of the first data in a preceding first period, and whether a logical value of a potential of the second current path line in the first period is equal to the logical value of the second data in a preceding second period.