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Basic Bus: One initiator.

Basic bus illustration: one initiator and three targets.

No tri-states are used: address and write data outputs use wire joints or buffers, read data uses multiplexors.

No bus arbitration is needed.

Max throughput is unity (i.e. one word per clock tick).

Typical SoC bus capacity: 32 bits × 200 MHz = 6.4 Gb/s, but owing to protocol degrades with distance.

The interrupt wiring is not shown. If device 1 is a processor, it might have a dedicated interrupt wire from each other device.

(C) 2008-10, DJ Greaves, University of Cambridge, Computer Laboratory.