Patent ID: 7639065
Filing Date: 2009-12-29
Classification: G05F

Abstract:
1. A semiconductor integrated circuit, comprising: a first circuit block which operates at a first internal voltage; a second circuit block which operates at a second internal voltage, is connected to an output stage of the first circuit block, and receives a signal from the first circuit block, the second internal voltage being different from the first internal voltage; and a first voltage controller which supplies the first internal voltage to the first circuit block by using a first higher-potential power; and a second voltage controller which supplies the second internal voltage to the second circuit block by using a second higher-potential power, and performs control such that the second internal voltage does not exceed the first internal voltage, wherein, the first voltage controller changes a level of the first internal voltage on the basis of a first target voltage, and the second voltage controller changes a level of the second internal voltage on the basis of a second target voltage.