Electrical computers and digital data processing systems: input/ – Input/output data processing – Peripheral configuration
Reexamination Certificate
2006-07-04
2006-07-04
Park, Ilwoo (Department: 2182)
Electrical computers and digital data processing systems: input/
Input/output data processing
Peripheral configuration
C710S014000, C710S019000, C713S300000
Reexamination Certificate
active
07072989
ABSTRACT:
A device capable of operating at both a low power mode and at a high power mode which is connected to a host by a USB connection. The device includes a non-volatile memory which stores the operating state of the device when the host goes into hibernate mode and a flag which indicates that the host has entered the “hibernate” mode. When the device powers up, the previous state of the device is read from the memory. If the previous state was high power and the hibernate flag is set, the device restarts in high power mode without the need of any initialization to determine if the host will allow operation at high power speed mode. The device determines that the host is going into suspend mode (rather than power down mode) by determining if a suspend signal on the USB bus is followed by a power down operation.
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Kolokowsky Stephen Henry
McCoy Mark
Cypress Semiconductor, Inc.
Marger & Johnson & McCollom, P.C.
Park Ilwoo
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