| 摘要 |
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.
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