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Issue No. 01 - January (1972 vol. 21)
ISSN: 0018-9340
pp: 37-42
W.W. Plummer , Bolt Beranek & Newman, Inc.
When two or more processors attempt to simultaneously use a functional unit (memory, multiplier, etc.), an arbiter module must be employed to insure that processor requests are honored in sequence. The design of asynchronous arbiters is complicated because multiple input changes are allowed, and because inputs may change even if the circuit is not in a stable state. A practical arbiter and its implementation are presented. Implementation of various priority rules (linear, ring, mixed) is discussed, and building large arbiters with trees of two-user arbiters is considered.
Asynchronous arbiter, asynchronous logic design, conflict resolution, functional unit allocation, hardware resource allocation, macromodules, modular control logic, multiprocessor computer system, priority network, sequential machines with multiple input changes.

W. Plummer, "Asynchronous Arbiters," in IEEE Transactions on Computers, vol. 21, no. , pp. 37-42, 1972.
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