Electronic device and method
AssigneeKabushiki Kaisha Toshiba
InventorsIsamu Uchiyama, Ryuhei Yokota
Life of this patent
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Abstract
According to one embodiment, an electronic device includes a power supply, a port and a circuit. The port is configured to connect with an external device. The circuit is configured to control the power supply to supply a first voltage to the external device connected with the port if a system status of the electronic device is not a power-saving status, and to supply a second voltage different from the first voltage to the external device if the system status of the electronic device is the power-saving status.
Claims10
An electronic device, comprising:
- a port configured to connect with an external device;
- and
- a power supply control circuit comprising a first reference circuit and a second reference circuit, the first reference circuit capable of generating a first voltage suitable for a plurality of components in the electronic device, the second reference circuit capable of generating a second voltage suitable for the external device, the second voltage being different from the first voltage, wherein
- the power supply control circuit is configured to supply the first voltage generated by the first reference circuit to the external device connected with the port if a state of the electronic device is a general operation state, and to supply the second voltage generated by the second reference circuit to the external device connected with the port if the state of the electronic device is a shutdown state or a sleep state, and
- the second voltage is higher than the first voltage.
A method applicable to an electronic device comprising a port configured to connect with an external device, and a power supply control circuit comprising a first reference circuit and a second reference circuit, the first reference circuit capable of generating a first voltage suitable for a plurality of components in the electronic device, the second reference circuit capable of generating a second voltage suitable for the external device, the second voltage being different from the first voltage, the method comprising:
- supplying the first voltage generated by the first reference circuit to the external device connected with the port if a state of the electronic device is a general operation state, and supplying the second voltage generated by the second reference circuit to the external device connected with the port if the state of the electronic device is a shutdown state or a sleep state, wherein
- the second voltage is higher than the first voltage.
An electronic device, comprising:
- a port connectable to an external device;
- a power supply configured to generate a voltage, the generated voltage supplied to the external device through the port and internal components of the electronic device;
- and
- a power supply controller configured to
- change a level of the voltage generated from the power supply from a first level to a second level when the electronic device is a shutdown state or a sleep state, and
- change a level of the voltage generated from the power supply from the second level to the first level when the electronic device is not the shutdown state or the sleep state, wherein
- the second level is higher than the first level.
Dependencies are inferred from the claim text.