US 8,819,301 B2Granted

USB charging module

AssigneeVIA Technologies, Inc.

InventorsYi-Lin Lai, Hao-Hsuan Chiu, Terrance Shih

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Abstract

An apparatus is provided for charging a Universal Serial Bus (USB) device according to an optimal charging mode. The apparatus includes a charging module that is configured to obtain a descriptor from the USB device upon detection of the USB device on a USB bus. The charging module includes one or more descriptor entries disposed in a memory and a controller. The one or more descriptor entries include descriptor data, for matching the descriptor to a specific descriptor entry, and charging data, that specifies the optimal charging mode for the USB device. The controller is coupled to the memory, and is configured to match the descriptor to the specific descriptor entry, and is configured to initiate the optimal charging mode on the USB bus according to the charging data.

Claims10

Dependent claims

An apparatus for charging a defective Universal Serial Bus (USB) device according to an optimal charging mode, the apparatus comprising:

a charging module, configured to obtain a descriptor of the defective USB device upon detection of the defective USB device on a USB bus, the charging module comprising:
a memory, storing one or more descriptor entries, the one or more descriptor entries comprising:
descriptor data, being arranged for matching the descriptor to a specific descriptor entry;
charging data, being arranged for specifying the optimal charging mode for the USB device;
and
defect data, being arranged to indicate commands to be transmitted to the defective USB device to control internal hardware states in order to force a power saving state;
and
a controller, coupled to said memory, configured to compare the descriptor to the specific descriptor entry, and configured to initiate the optimal charging mode on the USB bus according to the charging data, wherein the charging module is disposed within a USB hub, and wherein the USB hub is coupled to a USB host, and wherein the charging module issues a reset command to be transmitted to the defective USB device after obtaining the descriptor, thereby allowing for normal enumeration procedures by the USB host.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/706,598Filed 6 Dec 2012 · us provisional application
Priority: EP 1218194728 Aug 2012
Published: US 2013/0151731 A113 Jun 2013
Granted: 26 Aug 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G06F 13/426
On a daisy chain bus: using an embedded synchronisation, e.g. Firewire bus, Fibre Channel bus, SSA bus
G06F 1/266
Power supply means, e.g. regulation thereof: arrangements to supply power to external peripherals either directly from the computer or under…
G06F 13/4022
Coupling between buses: using switching circuits, e.g. switching matrix, connection or expansion network
G06F 13/4068
Device-to-bus coupling: electrical coupling