Bus arbitration controller

Details Bus arbitration controller Bus arbitration controller

1988-02-16

1988-10-18

Griffin, Robert L.

Communications: electrical

Continuously variable indicating

With meter reading

370 85, 364200, H04Q 500, H04Q 118, H04J 302

Patent

active

047790890

ABSTRACT:
A bus arbitration controller controls access of a plurality of asynchronous potential master devices to a unitary interconnecting bus by forming a distributed state machine of arbitration logic units in each of the potential master devices. Each arbitration logic unit receives control signals by way of the unitary bus which are common to all the devices, each control signal being the logical OR of the corresponding signals from all other devices. The control signals include a device address/priority number and a synchronization signal set. The arbitration logic includes a priority resolver which awards bus access to a device having the highest address/priority number, and control logic which receives the common synchronization signal set and synchronizes the operation of the device in which the arbitration logic resides with all other devices contending for the unitary bus. The control logic and the priority resolver are programmable array logic circuits.

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"Arbitration and Control Acquisition in the Proposed IEEE 896 Futurebus", IEEE Micro, vol. 4, No. 4, Aug. 1984, D. M. Taub, pp. 28-41.

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