METHOD AND APPARATUS FOR SUPPORTING POWER CONSERVATION OPERATION MODES

摘要

An apparatus for managing power in an electronic device that receives the power from a bus is described. The apparatus comprises a clock enable circuit that disables a clock (430) that generates nominal clock frequencies derived from raw frequencies output by an oscillator upon receiving a first signal. A time-wise independent time reference circuit (420) is coupled to the clock enable circuit (430). The time-wise independent time reference circuit (420) sends the first signal to the clock enable circuit (430) a first predetermined period of time after receiving a signal to enter into a suspend state.