Avoidance of extended bus occupancy through simple control...

Details Avoidance of extended bus occupancy through simple control... Avoidance of extended bus occupancy through simple control...

2007-02-20

2007-02-20

Myers, Paul R. (Department: 2112)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus access regulation

C710S316000, C710S111000, C710S120000, C345S440000, C370S438000

Reexamination Certificate

active

10717670

ABSTRACT:
A shared bus system includes a bus, a first circuit which accesses the bus, a second circuit which shares the bus with the first circuit, and accesses the bus, a counter circuit which is provided in the second circuit, and performs a counting operation each time the second circuit accesses the bus, and an arbiter circuit which arbitrates requests for a right to use the bus between the first circuit and the second circuit, wherein the second circuit releases the right to use the bus in response to detection of a predetermined number of counting operations performed by the counter circuit after acquiring the right to use the bus from the arbiter circuit.

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PCI Local Bus, “PCI Local Bus Specification,” Production Version, Revision 2.1, Jun. 1, 1995, XP-002251932, pp. i-xvi, 1-282.

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