Patent ID: 8451487

Claim:
An image forming apparatus comprising: a reception controller configured to receive print data; a volatile memory configured to store program information for performing image formation; an image forming unit configured to form an image on the basis of the print data; an image formation controller configured to receive the program information from the volatile memory and to control the image forming unit on the basis of the program information; a power supply configured to stop supply of power to the volatile memory, the image forming controller and the image formation unit while continuing to supply power to the reception controller, when the condition for switching from a normal mode to a power saving mode is satisfied; an auxiliary volatile memory supplied with power by the power supply; and an information saving path configured to save the program information from the volatile memory to the auxiliary volatile memory before the switching to the power saving mode, wherein when the condition for switching from the power saving mode to the normal mode is satisfied, the reception controller instructs the power supply to supply power to the image formation controller, the volatile memory and the image forming unit, and transfers the program information in the auxiliary volatile memory to the volatile memory, wherein the auxiliary volatile memory is provided within the reception controller.