Patent ID: 8015426

Claim:
A device for providing voltage power gating, the device comprising: a voltage island comprising: logic circuitry; a mechanism for receiving a control signal associated with the logic circuitry, the control signal indicating an active state or an idle state of the logic circuitry; and a selector for enabling a power source to the logic circuitry in response to the control signal indicating the active state and for disabling the power source to the logic circuitry in response to the control signal indicating the idle state; voltage island state logic for storing state information associated with the logic circuitry, the state information utilized during a repowering of the logic circuitry to ensure that the logic circuitry starts from a known state; and voltage island control logic for maintaining a stable output state from the logic circuitry when the power source to the logic circuitry is disabled; thereby dynamically eliminating the power source from the logic circuitry on the device when the logic circuitry is in the idle state.