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AMBA5-IHI0032C-AMBA ATB Protocol Specification
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AMBA5_IHI0032C_AMBA ATB Protocol Specification
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Copyright © 2006, 2012, 2021 Arm Limited or its affiliates. All rights reserved.
ARM IHI 0032C (ID120321)
AMBA
®
ATB Protocol Specification
ii Copyright © 2006, 2012, 2021 Arm Limited or its affiliates. All rights reserved. ARM IHI 0032C
Non-Confidential ID120321
AMBA ATB Protocol Specification
Copyright © 2006, 2012, 2021 Arm Limited or its affiliates. All rights reserved.
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Copyright © 2014, 2017-2021 Arm Limited (or its affiliates). All rights reserved.
Arm Limited. Company 02557590 registered in England.
110 Fulbourn Road, Cambridge, England CB1 9NJ.
LES-PRE-21451 version 2.2
Change history
Date Issue Confidentiality Change
19 June 2006 A Non-Confidential First release, AMBA3, ATB version 1.0
28 March 2012 B Non-Confidential Second release, AMBA 4, ATB version 1.1
01 December 2021 C Non-Confidential Third release
ARM IHI 0032C Copyright © 2006, 2012, 2021 Arm Limited or its affiliates. All rights reserved. iii
ID120321 Non-Confidential
AMBA SPECIFICATION LICENCE
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iv Copyright © 2006, 2012, 2021 Arm Limited or its affiliates. All rights reserved. ARM IHI 0032C
Non-Confidential ID120321
of this Licence by You or by Arm LICENSEE shall stop using the relevant AMBA Specification and destroy all copies of
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accordance with the terms of the agreement entered into by Arm and the party that Arm delivered this document to.
Product Status
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Web Address
http://www.arm.com
ARM IHI 0032C Copyright © 2006, 2012, 2021 Arm Limited or its affiliates. All rights reserved. v
ID120321 Non-Confidential
Contents
AMBA ATB Protocol Specification
Preface
About this book ......................................................................................................... viii
Using this book ........................................................................................................... ix
Conventions ................................................................................................................ x
Additional reading ...................................................................................................... xii
Feedback .................................................................................................................. xiii
Chapter 01 Introduction
1.1 About the ATB protocol .......................................................................................... 1-16
1.2 About the ATB interface ......................................................................................... 1-17
Chapter 02 Signal Descriptions
2.1 ATB signals ............................................................................................................ 2-20
Chapter 03 Flow Control
3.1 About flow control ................................................................................................... 3-24
3.2 ATB connections and flow control signaling ........................................................... 3-25
Chapter 04 Other ATB Features
4.1 ATIDs ..................................................................................................................... 4-30
4.2 Buffer flush ............................................................................................................. 4-31
4.3 Signaling a trace trigger ......................................................................................... 4-34
4.4 Synchronization request ......................................................................................... 4-35
Chapter 05 Interface Signaling Rules
5.1 Interface signaling rules ......................................................................................... 5-38
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