Apparatus for switching a power state among a plurality of power states and method thereof

An apparatus that controls a device via a device driver, the apparatus comprising:

• a communication controller configured to receive a predetermined data;
• a processor;
• and
• a controller configured to switch a power state among a first power state, a second power state, and a third power state, the first power state being a state where the device driver is loaded and power is supplied to the device, is the processor, and the communication controller, the second power state being a state where the device driver is unloaded and the device and a part of the processor are unusable and another part of the processor and the communication controller are useable, the third power state being a state where the device driver is unloaded and the device and the processor are unusable and the communication controller is useable,
• wherein, based on receiving predetermined data in the third power state, the controller switches the power state from the third power state to the second power state without loading the device driver,
• wherein, after switching to the second power state, in a case where the predetermined data satisfies a condition, the controller loads the device driver and switches the power state from the second power state to the first power state, and
• wherein, after switching to the second power state, in a case where the predetermined data does not satisfy the condition, the controller maintains the second power state without loading the device driver.