Priority network for devices coupled by a common bus

Details Priority network for devices coupled by a common bus Priority network for devices coupled by a common bus

G - Physics

06

F

340/89

G06F 15/16 (2006.01) G06F 13/34 (2006.01) G06F 13/37 (2006.01)

Patent

CA 1103323

Title of the Invention PRIORITY NETWORK FOR DEVICES COUPLED BY A COMMON BUS Abstract of the Disclosure A priority network utilizing a common bus coupled to a plurality of priority seeking peripheral devices wherein a processor or any number of processors is connected to the common bus. Each successive peripheral device is connected to the common bus in increasing priority order, such that each de- vice will have a unique priority defined. Each peripheral de- vice is provided with an associated peripheral control unit. Each of the peripheral control units is connected in serial fashion on an enabling line with the output of the higher priority control unit providing an enabling input to the next lowest priority peripheral control unit, such that the highest priority peripheral device requesting bus access prevents all lower priority peripheral devices from gaining access to the common bus until the higher priority device has completed its data transfer.

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