| 摘要 |
This invention is directed to reducing power consumption even when there is a great amount of power consumed by a root complex in a printing apparatus (2) that employs a PCI Express architecture. To accomplish this, a printing apparatus (2) that includes a controller (105) capable of switching between a root complex and an endpoint and an accelerator controller (101) serving as a root complex performs the following processing. More specifically, in the power saving mode, the power source of the accelerator controller (101) is turned off and the controller (105) is set as a root complex. Power consumption in the power saving mode can be greatly reduced, and a return sequence from the power saving mode can be executed. |
