Patent ID: 8283663

Claim:
A multichip device comprising: an external terminal; and a first and second semiconductor devices: wherein the first semiconductor device comprises: a first internal terminal, wherein the second semiconductor device comprises: a substrate; and a second internal terminal that is coupled to the external terminal; a third internal terminal that is coupled to the first internal terminal; a switching unit that is formed above the substrate, a first wiring that is formed above the substrate, and that is arranged between the second internal terminal and the switching unit; a first functional circuit that is formed above the substrate; a second wiring that is formed above the substrate, and that is arranged between the switching unit and the first functional circuit; and a third wiring that is formed above the substrate, and that is arranged between the switching unit and the third internal terminal, wherein: the switching unit switches between a first connection configuration and a second connection configuration, the first wiring is coupled to the second wiring in the first connection configuration, and the first wiring is coupled to the third wiring in the second connection configuration.