Patent ID: 7932639

Claim:
A method comprising: providing a plurality of supply voltages from a voltage regulator (VR) in a system to an integrated circuit (IC) in the system, wherein providing the plurality of supply voltages includes providing a first supply voltage at a first supply voltage level and providing a second supply voltage at a second supply voltage level, wherein each of the plurality of supply voltages is identifiable by a corresponding identifier and wherein the VR is communicatively coupled to the IC; exchanging between the VR and the IC a voltage regulation message including an indication of a desired voltage supply level and an identifier indicating two or more supply voltages selected from the plurality of supply voltages, the voltage regulation message requesting a regulation of each of the two or more supply voltages; and changing an operating characteristic of the system based on the exchanged voltage regulation message, wherein changing the operating characteristic of the system includes concurrently transitioning the first supply voltage away from the first voltage level and transitioning the second supply voltage away from the second voltage level.