Patent ID: 8667313

Claim:
A System on Chip (SoC) configured to reduce power consumption, the SoC comprising: a clock unit configured to provide clock signals to all elements included in the. SoC, the elements comprising a modem and one or more peripheral elements; a main regulator configured to supply power provided from an external battery to remaining elements included in the SoC other than a Power Management Unit (PMU); and processing circuitry configured to: control the SoC to perform designated functions; stop the clock signal to a CPU by controlling the clock unit when a transition from an active state to a sleep state is made; store, in the PMU, register information associated with the CPU and all of the peripherals included in the SoC after the clock signal is stopped to the CPU; when the storing of register information is completed, stop provision of all clock signals to all of the elements by controlling the clock unit and control the main regulator to be powered off when the transition from the active state to the sleep state is made; control the main regulator to be powered on and provide the clock signal to the all of the peripherals other than the CPU when a transition from the sleep state to the active state is made; restore all register information associated with the CPU and the all of the peripherals included in the SoC after the clock signal is provided to the all of the peripherals other than the CPU; and when the restoring of the register information is completed, provide the clock signal to the CPU.