Electrical computers and digital data processing systems: input/ – Access locking
Reexamination Certificate
2006-08-08
2006-08-08
Perveen, Rehana (Department: 2112)
Electrical computers and digital data processing systems: input/
Access locking
C710S240000, C710S107000, C710S108000
Reexamination Certificate
active
07089339
ABSTRACT:
An improved system is described for allowing an embedded controller and a host processor to share access to modules in a computer system. The shared access system of the present invention enables exclusive, one-at-a-time access by a processor to a module and concurrent access by more than one processor to a module. An internal bus with two power sources is used to allow continued access by one of the processors when one of the two power sources is not providing power. Asynchronous clocking is provided to allow increased throughput to modules. An example of a protocol that allows an embedded controller to access more than one module is also described.
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Falik Ohad
Flachs Victor
Friedman Yehezkel
Kirschner Yuval
Huynh Kim T.
National Semiconductor Corporation
Perveen Rehana
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