Power management module for USB devices
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United States of America Patent
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Oct 27, 2015
Grant Date -
Jan 3, 2013
app pub date -
Jun 29, 2012
filing date -
Jun 30, 2011
priority date (Note) -
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Abstract
A system and method of managing power of a multi-function USB device suspends the device in response to receipt of a request to suspend from a USB host; assigns respective device functions to indefinite, locked or unlocked states; allows the device to resume if there are data or requests for host attention pending at a given function that is in the unlocked state and assigning the given function to the locked state; and otherwise maintains the suspend even if there are data are pending at one or more functions that are in the locked state.
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