The computer bus paths specifying operations and coordinating progress, including requests and acknowledgments. Some control travels from initiator to target and some returns. In the diagram, bus arbitration requests and grants are shown separately from transfer control to distinguish choosing an initiator from executing its bus transaction.[ref]
Lecture 21: Buses and I and O. CS152 lecture 21, slides 22 and 33–36: control signals, sequencing, request and grant
New to topics? Read the docs here!