Method and apparatus for arbitrating for a bus to enable split t

Details Method and apparatus for arbitrating for a bus to enable split t Method and apparatus for arbitrating for a bus to enable split t

1995-04-13

1997-04-15

Auve, Glenn A.

395293, G06F 1336

Patent

active

056218974

ABSTRACT:
An arrangement and method for arbitration to enable split transaction bus protocols provides for a slave to assert a mask signal that sets a mask bit in a mask register when the slave is not ready to complete a requested transaction. A requesting master is forced off the bus and prevented from re-arbitrating while the mask bit is set in the register. When the slave is ready to complete the transaction, a release master signal is asserted which causes the bit in the shift register to be reset. The requesting master is then able to re-arbitrate for use of the bus to complete the transaction. The usable bandwidth of the bus is increased since other masters are able to arbitrate and use the bus until the slave is ready to complete the transaction with the first requesting master.

REFERENCES:
patent: 4785394 (1988-11-01), Fischer
patent: 4789926 (1988-12-01), Clarke
patent: 5257356 (1993-10-01), Brockmann et al.
patent: 5469435 (1995-11-01), Krein et al.

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