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maximum USB bus power budget of 500 uA. To achieve that level of power
conservation, most of the device circuits need to be switched off. When the clock is
disabled to the USB-FScore all functions are disabled, but all operational states are
retained. The transceiver VP and VM signals can be used to construct a circuit able to
detect the resume signaling on the bus and restore the clocks to the rest of the circuit
when the USB host takes the bus out of the suspend state.
System Level Issues and Configuration
K20 Sub-Family Reference Manual, Rev. 1.1, Dec 2012
1070
Preliminary
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