Method of arbitration for bus use request and system therefor

Details Method of arbitration for bus use request and system therefor Method of arbitration for bus use request and system therefor

2005-04-21

2008-05-27

Auve, Glenn A. (Department: 2111)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus access regulation

C710S117000

Reexamination Certificate

active

07380034

ABSTRACT:
In plural master apparatus connected to a bus, a master apparatus issues, to an arbiter, a request signal requesting the use of the bus after a lapse of a predetermined interval when the use of the bus becomes necessary, while another master apparatus issues, to the arbiter, a request signal requesting the use of the bus immediately when the use of the bus becomes necessary. The arbiter grants a right to use the bus by equally handling the request signals from the master apparatus. Also there is prepared a signal indicating a traffic in the bus, and the request signal is issued after the lapse of the interval in case of a high traffic but it is issued immediately in case of a low traffic. It is thus possible to adjust the practical priority of the but use right in detail or to dynamically change such priority by the presence or absence of such interval or a length thereof.

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