Arbitration circuit for arbitrating requests from multiple proce

Details Arbitration circuit for arbitrating requests from multiple proce Arbitration circuit for arbitrating requests from multiple proce

1998-02-25

2000-02-22

Auve, Glenn A.

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus access regulation

710 41, 710116, G06F 1314

Patent

active

060292199

ABSTRACT:
A round robin arbitration circuit arbitrating N requests has a register storing one of N values, a priority encoder selecting one of N priority patterns according to the value in the register and assigning priorities to the requests based on the selected priority pattern, thereby conducting arbitration between the requests, a circuit updating the value in the register among the N values in a predetermined order synchronously with the arbitration, and a circuit updating the value in the register among the N values in the predetermined order at regular intervals that are asynchronous with the arbitration. At the regular intervals that are asynchronous with the arbitration, a jump is made in the predetermined updating order of the values to be set in the register. Accordingly, even if live-lock occurs, it will be solved when such a jump is made to make the number of priority patterns disagree with the number of requests issued in a loop.

REFERENCES:
patent: 5519837 (1996-05-01), Tran
patent: 5564062 (1996-10-01), Meaney et al.
patent: 5583999 (1996-12-01), Sato et al.
patent: 5640519 (1997-06-01), Lagendorf et al.

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