Method and apparatus for performing bus arbitration in a data pr

Details Method and apparatus for performing bus arbitration in a data pr Method and apparatus for performing bus arbitration in a data pr

1994-03-25

1995-05-16

Ray, Gopal C.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

3408255, 370 856, 364240, 3642401, 3642402, 3642426, 36424292, 3642405, 364DIG1, G06F 1336

Patent

active

054169100

ABSTRACT:
A data processing system (10) and method for performing bus arbitration protocol using an arbiter (14). The data processing system (10) has multiple bus masters (12, 16) each of which is coupled to multiple shared buses (20, 22, 24, 28). The arbiter (14) detects a bus request from a requesting bus master, and responds with a bus grant to notify the requesting bus master that the arbiter has selected the requesting bus master to be a bus-master elect for a shared bus (20). The requesting bus master monitors a shared signal line to determine when a current bus master has released ownership of the shared bus (20). When the requesting bus master assumes ownership of the shared bus it deactivates the bus request signal for a dock period after commencement of the bus transaction, which allows the arbiter (14) to select a next bus master-elect, thereby preventing any bus master from monopolizing the shared bus (20).

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