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FIGURE 7c Phase 2 Arbitration State Diagram

Note 1

Idle Bus Arbitration during Phase 2 is not an internal state of the Arbitration Controller It is shown in this state diagram only to give a better understanding

of Phase 2 arbitration

Note 2

Bus Grant ( BGRNT ) is driven by the arbitration controller during Phase 2 only if IBA was successful for this module and the Arbitration settling time (ta)

has not expired Also DI is shown here to indicate that IBA is allowed to select a new Master DI is not an Arbitration Controller signal DI is represented here for

completeness shake only to give a better understanding Also external logic will release the bit on the Parallel data bus

Note 3

This transition to Phase 3 occurs when this module was competing its arbitration settling time expired and the one micro-second Phase 2 error timer has

not expired

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