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US09158609B2 Universal serial bus testing device 有权
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Universal serial bus testing device
Abstract:
A USB testing device is provided for an electronic device having a USB port. The USB testing device includes a first USB control unit, a second USB control unit, and a micro-processor. When the first USB control unit has received power, the first USB control unit processes a connection test via a first data port. When the second USB control unit has received the power, the second USB control unit processes a connection test via a second data port. When the USB testing device is connected to the USB port, the micro-processor provides power to the first USB control unit. When the first USB control unit receives power, the first USB control unit provides power to the second USB control unit after waiting for a predetermined period of time. The electronic device determines whether the first and second data ports are operating properly.
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