Device charging over USB using a plurality of handshakes
First Claim
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1. A USB device, comprising:
- a power port for receiving power from a power source;
one or more device ports for coupling to devices, wherein the one or more device ports are coupled to the power port, wherein the one or more device ports are configured to provide at least a portion of the power from the power source to a device coupled to the one or more device ports, wherein the at least a portion of the power is usable by the device coupled to the one or more device ports to charge a battery of the device;
device logic coupled to the power port and the one or more device ports, wherein the device logic is configured to;
provide a first handshake to a first device port of the one or more device ports, wherein a device of a first device type coupled to the first device port is configured to charge its battery without further communication from the USB device based on the first handshake and wherein the first handshake indicates a maximum level of current;
monitor the first device port for a second handshake from a device of a second device type coupled to the first device port; and
in response to detecting the second handshake, provide a first response to the device of the second device type, wherein the device of the second device type is configured to charge its battery based on the first response to the second handshake.
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Abstract
Charging a device using a plurality of handshakes. A first device may provide a first handshake to a second device. A device of a first device type may be configured to charge its battery without further communication based on the first handshake. The first device may monitor a connection to the second device for a second handshake corresponding to a device of a second device type. In response to detecting the second handshake, the first device may provide a response to the second device. Accordingly, the second device of the second device type may be configured to charge its battery based on the second handshake.
91 Citations
18 Claims
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1. A USB device, comprising:
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a power port for receiving power from a power source; one or more device ports for coupling to devices, wherein the one or more device ports are coupled to the power port, wherein the one or more device ports are configured to provide at least a portion of the power from the power source to a device coupled to the one or more device ports, wherein the at least a portion of the power is usable by the device coupled to the one or more device ports to charge a battery of the device; device logic coupled to the power port and the one or more device ports, wherein the device logic is configured to; provide a first handshake to a first device port of the one or more device ports, wherein a device of a first device type coupled to the first device port is configured to charge its battery without further communication from the USB device based on the first handshake and wherein the first handshake indicates a maximum level of current; monitor the first device port for a second handshake from a device of a second device type coupled to the first device port; and in response to detecting the second handshake, provide a first response to the device of the second device type, wherein the device of the second device type is configured to charge its battery based on the first response to the second handshake. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for charging a device, comprising:
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providing, by a first device, a first handshake to a second device, wherein a second device of a first device type is configured to charge its battery without further communication based on the first handshake and wherein the first handshake indicates a maximum level of current; monitoring, by the first device, a connection to the second device for a second handshake corresponding to a second device of a second device type; and in response to detecting the second handshake, providing, by the first device, a first response to the second device of the second device type, wherein the second device of the second device type is configured to charge its battery based on the first response to the second handshake. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A non-transitory computer accessible memory medium storing program instructions for charging a second device by a first device, wherein the program instructions are executable by a processor to:
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provide a first handshake to the second device, wherein a second device of a first device type is configured to charge its battery without further communication based on the first handshake and wherein the first handshake indicates a maximum level of current; monitor a connection to the second device for a second handshake corresponding to a second device of a second device type; and in response to detecting the second handshake, provide a response to the second device of the second device type, wherein the second device of the second device type is configured to charge its battery based on the response to the second handshake.
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Specification