11.1. ASB Bus Interface Signals

The signals in the ASB interface can be grouped into four categories:

Addressing

BA[31:0]

BWRITE

BSIZE [1:0]

BLOK

BPROT

Memory request

BTRAN[1:0]

Data sampled

BD[31:0]

Slave response

BERROR

BWAIT

BLAST

System Arbiter

In addition to these signals, there are also three controls communicating with control logic in the system:

AGNT

selects the ARM as a bus master

AREQ

indicates that the ARM720T requires bus mastership

DSELARM

selects the ARM as a bus slave

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