Patent · US Active

Method of arbitrating access to a data bus

US7360002B2 · kind B2 · utility

53Cited by

8References

9Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Dieter Brueckner · Unterleiterbach, DE
Franz-Josef Goetz · Heideck, DE
Dieter Klotz · Ergolding, DE
Juergen Schimmer · Nuremberg, DE
Matthias Schweikart · Erlangen, DE

Key dates

Filing date	Mar 26, 2004
Grant date	Apr 15, 2008
Priority date	—
Expiry date	Aug 5, 2026

Classification

Technology area (CPC G)Physics
CPC primaryG06F13/368
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A method for arbitrating access to a data bus among subscribers or bus devices (Tn 1,Tn 2, . . . ), wherein the bus devices are coupled by at least one arbitration ring (12; 38, 40, 42, 44, 46, 48). The method comprises the following steps: a) requesting access by a first bus device; b) checking whether a first signal, which indicates that the arbitration ring is enabled, is present at an input (16) of the first bus device; c) if the first signal is present, outputting (18) a second signal by the first bus device; d) checking whether, at the end of a predetermined time period, the first signal is still present at the input (16) of the first bus device; and e) if the first signal is still present at the end of the predetermined time period, accessing the data bus by the first bus device.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.