Device enumeration current reduction
First Claim
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1. A method of enumerating a peripheral device, said method comprising:
- initiating operation of a peripheral device in a low-power mode, wherein the peripheral device comprises a processor configured to be operated at a power-conserving operating frequency during enumeration and at an increased operating frequency after enumeration;
obtaining enumeration information from the peripheral device; and
authorizing the peripheral device to increase power consumption following enumeration.
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Abstract
A method of enumerating a peripheral device preferably includes initiating operation of the device in a low-power mode. Power can be conserved, for instance, by slowing processor speed or by shutting off clocks to one or more unneeded blocks of the peripheral device during enumeration. During enumeration, a host computer preferably obtains enumeration information from the peripheral device and then uses that information to select a configuration state for operating the device following enumeration.
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Citations
20 Claims
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1. A method of enumerating a peripheral device, said method comprising:
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initiating operation of a peripheral device in a low-power mode, wherein the peripheral device comprises a processor configured to be operated at a power-conserving operating frequency during enumeration and at an increased operating frequency after enumeration; obtaining enumeration information from the peripheral device; and authorizing the peripheral device to increase power consumption following enumeration. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of controlling power consumption by a plurality of peripheral devices, said method comprising:
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initiating operation of the peripheral devices in a low-power mode; obtaining enumeration information from the peripheral devices; authorizing the peripheral devices to increase power consumption following enumeration; determining power requirements of the plurality of peripheral devices; and adjusting one or more operating parameters of one or more of the peripheral devices to accommodate the power requirements of other peripheral devices, wherein the operational parameters comprise processor operating frequency and block status. - View Dependent Claims (9)
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10. A method of meeting current limits during device enumeration, said method comprising:
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powering up a peripheral device in a low-power mode, wherein the peripheral device comprises a processor configured to be operated at a power-conserving operating frequency during enumeration and at an increased operating frequency after enumeration; and increasing the power consumption of the peripheral device following enumeration. - View Dependent Claims (11, 12, 13, 14)
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15. A computer system, comprising:
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a host; and a peripheral device connected to the host, said peripheral device configured to power up in a low-power mode, wherein the peripheral device comprises a processor configured to be operated at a power-conserving operating frequency during enumeration and at an increased operating frequency after enumeration; wherein the host is configured to retrieve enumeration information from the peripheral device during enumeration and to permit increased current consumption by the peripheral device following enumeration. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification