Semiconductor integrated circuit and an electronic apparatus incorporating a multiplicity of semiconductor integrated circuits

摘要

An electronic apparatus having a multiplicity of operably connected semiconductor integrated circuits (ICs) arranged on a substrate and operable at different operating voltages. The interface voltages between two ICs is set to the lowest operating voltage of the ICs. Each IC other than those operating at the lowest operating voltage has an input circuit for converting the lowest operating voltage of an input signal to its operating voltage and an output circuit for converting the voltage of its output signal to the lowest operating voltage.