UNIVERSAL SERIAL BUS HOST AND POWER MANAGEMENT METHOD THEREOF
First Claim
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1. A universal serial bus (USB) host, comprising:
- a power unit comprising a battery and a charging module configured to control the battery; and
a USB interface unit configured to interface with a first USB device, wherein the first USB device is self-powered,wherein the USB interface unit is configured to be controlled based on a remaining amount of power of the battery, and the USB interface unit is configured to maintain a data connection between the USB interface unit and the first USB device when a power supply connection between the USB interface unit and the first USB device is disconnected.
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Abstract
A universal serial bus (USB) host includes a power unit and a USB interface unit. The power unit includes a battery and a charging module configured to control the battery. The USB interface unit is configured to interface with a first USB device, and is configured to be controlled based on a remaining amount of power of the battery. The USB interface unit is further configured to maintain a data connection between the USB interface unit and the first USB device when a power supply connection between the USB interface unit and the first USB device is disconnected.
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Citations
20 Claims
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1. A universal serial bus (USB) host, comprising:
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a power unit comprising a battery and a charging module configured to control the battery; and a USB interface unit configured to interface with a first USB device, wherein the first USB device is self-powered, wherein the USB interface unit is configured to be controlled based on a remaining amount of power of the battery, and the USB interface unit is configured to maintain a data connection between the USB interface unit and the first USB device when a power supply connection between the USB interface unit and the first USB device is disconnected. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A universal serial bus (USB) host, comprising:
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a power unit comprising a battery and a charging module configured to control the battery; and a USB interface unit configured to interface with at least one of a self-powered USB device or a bus-powered USB device, wherein the USB interface unit is configured to be controlled based on a remaining amount of power of the battery, and the USB interface unit is configured to separately control a power supply line connected to the USB interface unit and at least one of the self-powered and bus-powered USB devices, and a data communication line connected to the USB interface unit and at least one of the self-powered and bus-powered USB devices. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A universal serial bus (USB) power management method, comprising:
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connecting a USB device to a USB host, wherein the USB host comprises a battery; determining a remaining amount of power of the battery; setting an operation mode of the USB host to a normal mode upon determining that the remaining amount of power is greater than a first power threshold; setting the operation mode of the USB host to a power saving mode upon determining that the remaining amount of power is less than or equal to the first power threshold and greater than a second power threshold; and setting the operation mode of the USB host to a power charging mode upon determining that the remaining amount of power is less than the second power threshold, wherein the USB host communicates data with the USB device and supplies power to the USB device while in the normal mode, the USB host communicates data with the USB device and does not supply power to the USB device while in the power saving mode, and the USB host communicates data with the USB device and receives power from the USB device while in the power charging mode. - View Dependent Claims (20)
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Specification