The need for mediation operation is eliminated by adoption of a connection topology in which a circuit for executing one transmission (TR—00T), and a circuit for executing a plurality of receptions (TR—10R, TR—20R, TR—30R) are connected to one penetration-electrode group (for example, TSVGL—0). In order to implement the connection topology even in the case of piling up a plurality of LSIs one after another, in particular, a programmable memory element for designating respective penetration-electrode ports for use in transmit, or for us in receive, and address allocation of the respective penetration-electrode ports is mounted in stacked LSIs.