Low power USB 2.0 subsystem
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United States of America Patent
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Sep 1, 2015
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N/A
app pub date -
Dec 27, 2011
filing date -
Jul 27, 2011
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Abstract
USB physical interface subsystems are provided that include a protection circuit including a power supply interface and a plurality of pin interfaces, a pin identifier circuit in communication with the protection circuit for detecting a device coupling to a pin connected to one pin interface of the plurality of pin interfaces, a USB physical interface, and a dual power supply regulator configured to receive power via the power supply interface, to continuously supply a first voltage to the protection circuit, and to provide a second voltage and a third voltage to the pin identifier circuit and the USB physical interface, the second voltage and the third voltage being switched outputs.
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