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ARM® Cortex™-A8 Technical Reference Manual
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ARM Cortex-A8 Technical Reference Manual
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Copyright © 2006 ARM Limited. All rights reserved.
ARM DDI 0344B
Cortex
™
-A8
Revision: r1p1
Technical Reference Manual
ii Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0344B
Cortex-A8
Technical Reference Manual
Copyright © 2006 ARM Limited. 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 owned by ARM Limited, 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 Limited 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.
Some material in this document is based on ANSI/IEEE Std 754-1985, IEEE Standard for Binary
Floating-Point Arithmetic and on IEEE Std. 1500-2005, IEEE Standard Testability Method for Embedded
Core-based Integrated Circuits. The IEEE disclaims any responsibility or liability resulting from the
placement and use in the described manner.
Where the term ARM is used it means “ARM of any or its subsidiaries as appropriate”.
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.
Product Status
The information in this document is final, that is for a developed product.
Change History
Date Issue Confidentiality Change
18 July 2006 A Confidential First release for r1p0
13 December 2006 B Non-Confidential First release for r1p1
ARM DDI 0344B Copyright © 2006 ARM Limited. All rights reserved. iii
Web Address
http://www.arm.com
iv Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0344B
ARM DDI 0344B Copyright © 2006 ARM Limited. All rights reserved. v
Contents
Cortex-A8 Technical Reference Manual
Preface
About this manual .................................................................................... xxviii
Feedback ................................................................................................. xxxiv
Chapter 1 Introduction
1.1 About the processor .................................................................................... 1-2
1.2 ARMv7-A architecture ................................................................................. 1-3
1.3 Components of the processor ..................................................................... 1-4
1.4 External interfaces of the processor ............................................................ 1-8
1.5 Debug ......................................................................................................... 1-9
1.6 Power management .................................................................................. 1-10
1.7 Configurable options ................................................................................. 1-11
1.8 Product revisions ...................................................................................... 1-13
Chapter 2 Programmer’s Model
2.1 About the programmer’s model ................................................................... 2-3
2.2 Thumb-2 architecture .................................................................................. 2-4
2.3 Thumb-2EE architecture ............................................................................. 2-6
2.4 Jazelle Extension ...................................................................................... 2-10
2.5 TrustZone technology ............................................................................... 2-13
2.6 NEON technology ..................................................................................... 2-15
2.7 VFPv3 architecture ................................................................................... 2-16
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