Copyright © 2003, 2004, 2010, 2011 ARM. All rights reserved.
ARM IHI 0022D (ID102711)
AMBA
®
AXI
™
and ACE
™
Protocol
Specification
AXI3
™
, AXI4
™
, and AXI4-Lite
™
ACE and ACE-Lite
™
ii Copyright © 2003, 2004, 2010, 2011 ARM. All rights reserved. ARM IHI 0022D
Non-Confidential ID102711
AMBA AXI and ACE Protocol Specification
AXI3, AXI4, and AXI4-Lite
ACE and ACE-Lite
Copyright © 2003, 2004, 2010, 2011 ARM. All rights reserved.
Release Information
The following changes have been made to this specification.
Issues B and C of this document included an AXI specification version, v1.0 and v2.0. These version number have been
discontinued, to remove confusion with the AXI versions, AXI3 and AXI4.
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Change history
Date Issue Confidentiality Change
16 June 2003 A Non-Confidential First release
19 March 2004 B Non-Confidential First release of AXI specification v1.0
03 March 2010 C Non-Confidential First release of AXI specification v2.0
03 June 2011 D-2c Non-Confidential Public beta draft of AMBA AXI and ACE Protocol Specification
28 October 2011 D Non-Confidential First release of AMBA AXI and ACE Protocol Specification
ARM IHI 0022D Copyright © 2003, 2004, 2010, 2011 ARM. All rights reserved. iii
ID102711 Non-Confidential
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Product Status
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Web Address
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iv Copyright © 2003, 2004, 2010, 2011 ARM. All rights reserved. ARM IHI 0022D
Non-Confidential ID102711
ARM IHI 0022D Copyright © 2003, 2004, 2010, 2011 ARM. All rights reserved. v
ID102711 Non-Confidential
Contents
AMBA AXI and ACE Protocol Specification AXI3,
AXI4, and AXI4-Lite ACE and ACE-Lite
Preface
About this specification ................................................................................................ x
Using this specification ............................................................................................... xi
Conventions .............................................................................................................. xiii
Additional reading ...................................................................................................... xv
Feedback .................................................................................................................. xvi
Part A AMBA AXI3 and AXI4 Protocol Specification
Chapter A1 Introduction
A1.1 About the AXI protocol ......................................................................................... A1-20
A1.2 AXI revisions ........................................................................................................ A1-21
A1.3 AXI Architecture ................................................................................................... A1-22
A1.4 Terminology ......................................................................................................... A1-25
Chapter A2 Signal Descriptions
A2.1 Global signals ...................................................................................................... A2-28
A2.2 Write address channel signals ............................................................................. A2-29
A2.3 Write data channel signals ................................................................................... A2-30
A2.4 Write response channel signals ........................................................................... A2-31
A2.5 Read address channel signals ............................................................................. A2-32
A2.6 Read data channel signals ................................................................................... A2-33
A2.7 Low-power interface signals ................................................................................ A2-34
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