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Copyright © 2010 ARM. All rights reserved.
ARM IHI 0051A (ID030510)
AMBA
®
4 AXI4-Stream Protocol
Version: 1.0
Specification
ARM IHI 0051A Copyright © 2010 ARM. All rights reserved. ii
ID030510 Non-Confidential
AMBA 4 AXI4-Stream Protocol
Specification
Copyright © 2010 ARM. All rights reserved.
Release Information
The following changes have been made to this book.
Proprietary Notice
Words and logos marked with
®
or
™
are registered trademarks or trademarks of ARM
®
in the EU and other countries,
except as otherwise stated below in this proprietary notice. Other brands and names mentioned herein may be the
trademarks of their respective owners.
Neither the whole nor any part of the information contained in, or the product described in, this document may be
adapted or reproduced in any material form except with the prior written permission of the copyright holder.
The product described in this document is subject to continuous developments and improvements. All particulars of the
product and its use contained in this document are given by ARM in good faith. However, all warranties implied or
expressed, including but not limited to implied warranties of merchantability, or fitness for purpose, are excluded.
This document is intended only to assist the reader in the use of the product. ARM shall not be liable for any loss or
damage arising from the use of any information in this document, or any error or omission in such information, or any
incorrect use of the product.
Where the term ARM is used it means “ARM or any of its subsidiaries as appropriate”.
ARM AMBA Specification Licence
THIS END USER LICENCE AGREEMENT (“LICENCE”) IS A LEGAL AGREEMENT BETWEEN YOU (EITHER
A SINGLE INDIVIDUAL, OR SINGLE LEGAL ENTITY) AND ARM LIMITED (“ARM”) FOR THE USE OF THE
RELEVANT AMBA SPECIFICATION ACCOMPANYING THIS LICENCE. ARM IS ONLY WILLING TO
LICENSE THE RELEVANT AMBA SPECIFICATION TO YOU ON CONDITION THAT YOU ACCEPT ALL OF
THE TERMS IN THIS LICENCE. BY CLICKING “I AGREE” OR OTHERWISE USING OR COPYING THE
RELEVANT AMBA SPECIFICATION YOU INDICATE THAT YOU AGREE TO BE BOUND BY ALL THE
TERMS OF THIS LICENCE. IF YOU DO NOT AGREE TO THE TERMS OF THIS LICENCE, ARM IS
UNWILLING TO LICENSE THE RELEVANT AMBA SPECIFICATION TO YOU AND YOU MAY NOT USE OR
COPY THE RELEVANT AMBA SPECIFICATION AND YOU SHOULD PROMPTLY RETURN THE RELEVANT
AMBA SPECIFICATION TO ARM.
“LICENSEE” means You and your Subsidiaries.
“Subsidiary” means, if You are a single entity, any company the majority of whose voting shares is now or hereafter
owned or controlled, directly or indirectly, by You. A company shall be a Subsidiary only for the period during which
such control exists.
1. Subject to the provisions of Clauses 2, 3 and 4, ARM hereby grants to LICENSEE a perpetual, non-exclusive,
non-transferable, royalty free, worldwide licence to:
(i) use and copy the relevant AMBA Specification for the purpose of developing and having developed products that
comply with the relevant AMBA Specification;
(ii) manufacture and have manufactured products which either: (a) have been created by or for LICENSEE under the
licence granted in Clause 1(i); or (b) incorporate a product(s) which has been created by a third party(s) under a licence
granted by ARM in Clause 1(i) of such third party’s ARM AMBA Specification Licence; and
(iii) offer to sell, sell, supply or otherwise distribute products which have either been (a) created by or for LICENSEE
under the licence granted in Clause 1(i); or (b) manufactured by or for LICENSEE under the licence granted in Clause
1(ii).
Change history
Date Issue Confidentiality Change
03 March 2010 A Non-Confidential First release
ARM IHI 0051A Copyright © 2010 ARM. All rights reserved. iii
ID030510 Non-Confidential
2. LICENSEE hereby agrees that the licence granted in Clause 1 is subject to the following restrictions:
(i) where a product created under Clause 1(i) is an integrated circuit which includes a CPU then either: (a) such CPU
shall only be manufactured under licence from ARM; or (b) such CPU is neither substantially compliant with nor
marketed as being compliant with the ARM instruction sets licensed by ARM from time to time;
(ii) the licences granted in Clause 1(iii) shall not extend to any portion or function of a product that is not itself compliant
with part of the relevant AMBA Specification; and
(iii) no right is granted to LICENSEE to sublicense the rights granted to LICENSEE under this Agreement.
3. Except as specifically licensed in accordance with Clause 1, LICENSEE acquires no right, title or interest in any
ARM technology or any intellectual property embodied therein. In no event shall the licences granted in accordance
with Clause 1 be construed as granting LICENSEE, expressly or by implication, estoppel or otherwise, a licence to use
any ARM technology except the relevant AMBA Specification.
4. THE RELEVANT AMBA SPECIFICATION IS PROVIDED “AS IS” WITH NO WARRANTIES EXPRESS,
IMPLIED OR STATUTORY, INCLUDING BUT NOT LIMITED TO ANY WARRANTY OF SATISFACTORY
QUALITY, MERCHANTABILITY, NONINFRINGEMENT OR FITNESS FOR A PARTICULAR PURPOSE.
5. No licence, express, implied or otherwise, is granted to LICENSEE, under the provisions of Clause 1, to use the ARM
tradename, or AMBA trademark in connection with the relevant AMBA Specification or any products based thereon.
Nothing in Clause 1 shall be construed as authority for LICENSEE to make any representations on behalf of ARM in
respect of the relevant AMBA Specification.
6. This Licence shall remain in force until terminated by you or by ARM. Without prejudice to any of its other rights if
LICENSEE is in breach of any of the terms and conditions of this Licence then ARM may terminate this Licence
immediately upon giving written notice to You. You may terminate this Licence at any time. Upon expiry or termination
of this Licence by You or by ARM LICENSEE shall stop using the relevant AMBA Specification and destroy all copies
of the relevant AMBA Specification in your possession together with all documentation and related materials. Upon
expiry or termination of this Licence, the provisions of clauses 6 and 7 shall survive.
7. The validity, construction and performance of this Agreement shall be governed by English Law.
ARM contract references: LEC-PRE-00490-V4.0 ARM AMBA Specification Licence
Confidentiality Status
This document is Non-Confidential. The right to use, copy and disclose this document may be subject to license
restrictions in accordance with the terms of the agreement entered into by ARM and the party that ARM delivered this
document to.
Unrestricted Access is an ARM internal classification.
Product Status
The information in this document is final, that is for a developed product.
Web Address
http://www.arm.com
ARM IHI 0051A Copyright © 2010 ARM. All rights reserved. iv
ID030510 Non-Confidential
Contents
AMBA 4 AXI4-Stream Protocol Specification
Preface
About this book ........................................................................................................... ix
Feedback ................................................................................................................... xii
Chapter 1 Introduction
1.1 About the AXI4-Stream protocol .............................................................................. 1-2
1.2 Data streams ........................................................................................................... 1-3
Chapter 2 Interface Signals
2.1 Signal list ................................................................................................................. 2-2
2.2 Transfer signaling .................................................................................................... 2-3
2.3 Data signaling .......................................................................................................... 2-5
2.4 Byte qualifiers .......................................................................................................... 2-8
2.5 Packet boundaries ................................................................................................... 2-9
2.6 Source and destination signaling ........................................................................... 2-10
2.7 Clock and Reset .................................................................................................... 2-11
2.8 User signaling ........................................................................................................ 2-12
Chapter 3 Default Signaling Requirements
3.1 Default value signaling ............................................................................................. 3-2
3.2 Compatibility considerations .................................................................................... 3-4
Chapter 4 Transfer Interleaving and Ordering
4.1 Transfer interleaving ................................................................................................ 4-2
4.2 Transfer ordering ..................................................................................................... 4-3
Appendix A Comparison with the AXI4 Write Data Channel
A.1 Differences to the AXI4 write data channel .............................................................. A-2
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