Patent ID: 7586325

Claim:
An integrated circuit comprising: configurable application circuitry adapted to operate at any selected power supply voltage of a plurality of available power supply voltages; PT-control circuitry adapted to generate a PT-control signal indicative of variations in at least one of process and temperature, wherein the PT-control circuitry operates at a PT reference voltage; and application-control circuitry adapted to control configuration of the application circuitry based on the selected power supply voltage for the application circuitry and the PT-control signal, wherein the selected power supply voltage for the application circuitry is independent of the PT reference voltage, wherein: the PT-control signal is capable of having any one of a plurality of different values, wherein each value corresponds to a different PT state; the selected power-supply voltage is indicated by a voltage-selection signal capable of having any one of a plurality of different values, wherein each value corresponds to a different power supply voltage; and the application-control circuitry is adapted to treat the PT-control signal and the voltage-selection signal as mutually independent inputs in controlling the configuration of the application circuitry.