Electrical computers and digital data processing systems: input/ – Intrasystem connection
Reexamination Certificate
2005-03-29
2005-03-29
Vo, Tim (Department: 2112)
Electrical computers and digital data processing systems: input/
Intrasystem connection
C713S600000
Reexamination Certificate
active
06874047
ABSTRACT:
A system and method for implementing an SMBus/I2C interface in a computer connectable to a network. The system includes a plurality of devices communicably coupled to an SMBus. The system operates at a first clock rate when the system is awake, and at a second clock rate less than the first clock rate when the system is sleeping. At least when the system is sleeping, a first device stores data transferred via the SMBus in a register, and a second device drives the clock line of the SMBus to a low logic level while the data is stored in the register of the first device. Upon completion of the data transfer operation, the first device clears the data from the register, and the second device releases the clock line to allow it to be pulled-up by pull-up circuitry connected to the SMBus.
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Brown Michael K.
Duguay Christopher J.
Reissfelder Robert
Turnbull Robert F.
3Com Corporation
Huynh Kim T.
Vo Tim
Weingarten Schurgin, Gagnebin & Lebovici LLP
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