Bus arbitrator with a hierarchical control structure

Details Bus arbitrator with a hierarchical control structure Bus arbitrator with a hierarchical control structure

1998-06-26

2000-10-31

An, Meng-Ai T.

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus access regulation

710110, 710125, 710126, G06F 1300

Patent

active

061417130

ABSTRACT:
A bus arbitration apparatus includes N number of hierarchical arbitrators, wherein each hierarchical arbitrator contained in the lowest hierarchy is connected to p number of the bus request units. Especially the hierarchical arbitrator of each hierarchy has: a selector for generating a selection signal based on bus requests from the hierarchical arbitrators of a lower hierarchy and priorities of the hierarchical arbitrators of the lower hierarchy, wherein the selection signal represents a selected hierarchical arbitrator of the lower hierarchy, and for generating the bus request from the selected hierarchical arbitrator as a bus request from said each hierarchy; and a multiplexer, in response to the selection signal, for providing bus cycle information from the selected hierarchical arbitrator as bus cycle information of said each hierarchy.

REFERENCES:
patent: 4511959 (1985-04-01), Nicolas et al.
patent: 4621342 (1986-11-01), Capizzi et al.
patent: 5168568 (1992-12-01), Thayer et al.
patent: 5301298 (1994-04-01), Kagan et al.
patent: 5862355 (1999-01-01), Logsdon
patent: 5884051 (1999-03-01), Schaffer et al.
patent: 5987549 (1999-11-01), Hagersten et al.

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