Patent ID: 6388509
Filing Date: 2002-05-14
Classification: H01L

Abstract:
A semiconductor integrated circuit comprising:at least one constant voltage generation section for increasing or decreasing a power voltage supplied from at least one external power source, based on a basic voltage, to generate at least one constant voltage; at least one function block to which is supplied said at least one constant voltage generated by said at least one constant voltage generation section; at least one operating state detection section for generating an operating state data indicating an operating state of said at least one function block, based on a signal including operating speed information of said at least one function block; and at least one voltage output control section for modifying said basic voltage of said at least one constant voltage generation section, based on said operating state data; wherein an operating-setting signal is input to said at least one function block, and said at least one function block supplies said signal to said at least one operating state detection section when said operating-setting signal is active.