Patent ID: 8839161

Claim:
A semiconductor device comprising: a first semiconductor chip including: a plurality of driver circuits; an output switching circuit coupled to the plurality of driver circuits; an output terminal; a register circuit provided on the first semiconductor chip to store a relief signal and coupled to the output terminal; and a first control circuit associated with the plurality of driver circuits and generating a first selection signal based on a relief signal; a second semiconductor chip comprising: a plurality of first receiver circuits; a first input switching circuit; a first input terminal coupled to the output terminal; and a second control circuit associated with the plurality of first receiver circuits and generating a second selection signal based on the relief signal; a third semiconductor chip comprising: a plurality of second receiver circuits; a second input switching circuit, a second input terminal coupled to the output terminal via the at least one of the plurality of through silicon vias; a third control circuit associated with the plurality of second receiver circuits and generating a third selection signal based on the relief signal; and a plurality of through silicon vias provided on at least one of the first to third semiconductor chips, the output switching circuit coupling each of the plurality of driver circuits to corresponding one of a plurality of first through silicon vias of the plurality of the through silicon vias based on the first selection signal, the first input switching circuit coupling each of the plurality of first receiver circuits to corresponding one of the first through silicon vias based on the second selection signal, and the second input switching circuit coupling each of the plurality of second receiver circuits to corresponding one of the first through silicon vias based on the third selection signal.