Information processing apparatus having electronic device whose operating speed is controlled, and method of controlling the operating speed of the electronic device
First Claim
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1. An information processing apparatus comprising:
- a power supply circuit which generates a power supply voltage;
an electronic device to which the power supply voltage generated by the power supply circuit is applied;
a voltage monitoring unit configured to monitor the power supply voltage applied to the electronic device and make a request to switch an operating speed of the electronic device to a lower operating speed as the power supply voltage is low; and
an operating-speed control unit configured to switch the operating speed of the electronic device at the request of the voltage monitoring unit.
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Abstract
A power supply circuit generates a power supply voltage. The power supply voltage is applied to an electronic device. A voltage monitoring unit monitors a power supply voltage that is applied to the electronic device, and makes a request to a bus control unit to switch the operating speed of the electronic device in accordance with the power supply voltage such that the operating speed of the electronic device becomes lower as the power supply voltage drops. The bus control nit switches the transfer speed of a bus at the request of the voltage monitoring unit to switch the operating speed of the electronic device.
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Citations
13 Claims
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1. An information processing apparatus comprising:
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a power supply circuit which generates a power supply voltage; an electronic device to which the power supply voltage generated by the power supply circuit is applied; a voltage monitoring unit configured to monitor the power supply voltage applied to the electronic device and make a request to switch an operating speed of the electronic device to a lower operating speed as the power supply voltage is low; and an operating-speed control unit configured to switch the operating speed of the electronic device at the request of the voltage monitoring unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of controlling an operating speed of an electronic device included in an information processing apparatus, a power supply voltage that is generated by a power supply circuit being applied to the electronic device, the method comprising:
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monitoring the power supply voltage that is applied to the electronic device; and switching the operating speed of the electronic device such that the operating speed becomes lower as the power supply voltage drops, in accordance with a result of monitoring of the power supply voltage. - View Dependent Claims (11, 12, 13)
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Specification