Semiconductor integrated circuit device

[0040] Below, preferred embodiments of the present invention will be discussed with reference to the accompanying drawings. It is noted that elements identical or similar to each other are denoted by the same reference character / numeral in the drawings.

[0041]

[0042] FIG. 1 is a circuit diagram showing a structure of a semiconductor integrated circuit device 100 according to a first preferred embodiment of the present invention. The semiconductor integrated circuit device 100 with a single semiconductor chip on which an integrated circuit is formed includes a core circuit 2 for implementing a primary function of the integrated circuit and an interface portion 4 for converting a digital signal Din generated in the core circuit 2 to a digital signal having a greater voltage amplitude than that of the signal Din, to provide the digital signal as a signal Dout to another semiconductor chip which is connected with a node 23.

[0043] The core circuit 2 is connected to a power node to which a