Electronic device and method for controlling the same
AssigneeCanon Kabushiki Kaisha
InventorAkihiro Matsumoto
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Abstract
The present disclosure provides an electronic device including a main controller and a communication controller configured to communicate with the main controller and a device through a predetermined physical communication interface based on a predetermined communication standard. The communication controller instructs power-off of the predetermined physical communication interface and the device when an event which causes transition to a power saving state occurs in the main controller, and determines whether the predetermined physical communication interface is to be returned from the power saving state without power-on of the device or with power-on of the device when an event which causes return from the power saving state occurs in the main controller.
Claims12
An electronic device comprising:
- a device controller configured to control the electronic device and including one or more processors and one or more memories;
- a storage device;
- a first controller configured to communicate with the device controller and including one or more processors and one or more memories;
- and
- a second controller configured to communicate with the first controller and the storage device through a predetermined physical communication interface based on a predetermined communication standard, the second controller including one or more processors and one or more memories,
- wherein the electronic device makes a transition from a first power state to a second power state having a lower power consumption than the first power state,
- wherein the second power state is a state in which at least the second controller is in a power saving state corresponding to the second power state and a power of the storage device is in an off state,
- wherein the first controller causes the second controller to return from the power saving state corresponding to the second power state in response to returning of the electronic device from the second power state to the first power state, and
- wherein the second controller, having returned from the power saving state, causes the power of the storage device to make a transition from an off state to an on state, in a case where a command received from the first controller is a first command, and
- maintains the power of the storage device in the off state in a case where the command received from the first controller is a second command different from the first command.
A method for controlling an electronic device including a device controller configured to control the electronic device and including one or more processors and one or more memories;
- a storage device;
- a first controller configured to communicate with the device controller and including one or more processors and one or more memories;
- and
- a second controller configured to communicate with the first controller and the storage device through a predetermined physical communication interface based on a predetermined communication standard, the second controller including one or more processors and one or more memories, and the method comprising:
- the electronic device making a transition from a first power state to a second power state having a lower power consumption than the first power state, wherein the second power state is a state in which at least the second controller is in a power saving state corresponding to the second power state and a power of the storage device is in an off state;
- the first controller causing the second controller to return from the power saving state corresponding to the second power state in response to returning of the electronic device from the second power state to the first power state;
- and
- the second controller, having returned from the power saving state, causing the power of the storage device to make a transition from an off state to an on state, in a case where a command received from the first controller is a first command, and
- maintaining the power of the storage device in the off state in a case where the command received from the first controller is a second command different from the first command.
Dependencies are inferred from the claim text.