Patent ID: 8390310

Claim:
A test system of a semiconductor integrated circuit comprising an output device and an input device for conducting an input/output characteristics test of the output device and the input device inside the semiconductor integrated circuit, the test system comprising: a test board where the semiconductor integrated circuit is mounted on; and a transmission line that is provided in the test board and that establishes a wired connection between an external terminal of one circuit of one of the output device and the input device and external terminals of a plurality of circuits of another one of the output device and the input device, wherein the transmission line comprises a plurality of selection switches that are connected between the external terminal of one circuit of said one of the output device and the input device and the external terminals of the plurality of circuits of said another one of the output device and the input device, and that are controlled so that, when at least one selection switch is in an on-state, other selection switches are in an off-state.