Electrical computers and digital processing systems: support – Computer power control
Reexamination Certificate
2009-02-06
2011-11-08
Wang, Albert (Department: 2115)
Electrical computers and digital processing systems: support
Computer power control
C455S573000, C710S008000
Reexamination Certificate
active
08055919
ABSTRACT:
A system and method for efficient power management of peripheral port connections. A USB hub core is configured to detect the presence of a legacy peripheral device on a downstream port when a corresponding USB host is in a non-operational state. The USB hub core chooses a battery charger signature for the peripheral device and subsequently directs an external port power controller to simulate disconnection/reconnection of the peripheral device. The chosen signature is presented to the peripheral device. If the signature matches the expected value of the peripheral device, then the peripheral device charges its battery. Otherwise, the process of choosing a different signature and simulating disconnection/reconnection is repeated.
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Meyertons Hood Kivlin Kowert & Goetzel P.C.
Rankin Rory D.
Standard Microsystems Corporation
Wang Albert
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