ARM1136JF-S™ and ARM1136J-S™ Technical Reference ManualRevision: r1p3
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A.4. AHB interface signals

The AHB interface ports operate using standard AHB-Lite signals, extended for ARMv6.

This extension includes the following signals:

HRESP[2]

Signals an exclusive access failure.

HPROT[4:2]

Used to signal the memory types.

HPROT[5]

Signals that the access is an exclusive access.

HUNALIGN

Indicates that the access is unaligned and requires HBSTRB information.

HBSTRB[7:0]

Byte lane strobes.

HSIDEBAND[0]

Shared bit for current access.

HSIDEBAND[3:1]

Inner memory system attributes. Can be used to replace HPROT[4:2] if the level two system requires inner cache attributes. The encoding of HSIDEBAND[3:1] is the same as HPROT[4:2], but s to inner cache attributes as opposed to outer cache attributes.

Table A.4 shows the one or two-letter suffix used on port signal names.

Table A.4. Port signal name suffixes

PortSuffixComment
Instruction fetchIRead only
Data readRRead only
Data writeWWrite only
Data read or data writeRWRead or write
DMADBidirectional
PeripheralPBidirectional

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