Patent ID: 6737839
Filing Date: 2004-05-18
Classification: G06F,H02M,Y02B

Abstract:
A semiconductor integrated circuit, comprising:a power supply terminal to which electric power with a predetermined voltage is supplied; a first power supply unit coupled to said power supply terminal and operating to supply source power with a first current supply capability; a second power supply unit, coupled to said power supply terminal and operating to supply source power with a second current supply capability smaller than said first current supply capability; a first circuit and a second circuit, said first circuit having a first operation mode and a second operation mode, said first circuit and said second circuit being coupled to said first power supply unit in said first operation mode and coupled to said second power supply unit in said second operation mode, wherein said first power supply unit and said second power supply unit are switched in accordance with an operation mode signal instructing the operation mode of said first circuit, such that said first circuit and said second circuit are supplied with source power from said first power supply unit in said first operation mode of said first circuit, and supplied with source power from said second power supply unit in said second operation mode of said first circuit.