Port power controller for USB hubs with legacy battery charge support
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...
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| Main Author | |
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| Format | Patent |
| Language | Chinese English |
| Published |
01.10.2010
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| Subjects | |
| Online Access | Get full text |
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| 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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| AbstractList | 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. |
| Author | MAGNUSSON, HANS L |
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| RelatedCompanies | STANDARD MICROSYSTEMS CORPORATION |
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| Snippet | 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... |
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| SubjectTerms | CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING PHYSICS |
| Title | Port power controller for USB hubs with legacy battery charge support |
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