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ARM9TDMI



(Rev 3)

Technical Reference Manual

Copyright © 2000 ARM Limited. All rights reserved. ARM DDI 0180A

ARM9TDMI
Technical Reference Manual Copyright © 2000 ARM Limited. All rights reserved. Release Information
Change History Date March 2000 Issue A Confidentiality Non-Confidential Change First release

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. Where the term ARM is used it means “ARM or any of 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. Web Address http://www.arm.com

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Copyright © 2000 ARM Limited. All rights reserved.

ARM DDI 0180A

Contents ARM9TDMI Technical Reference Manual

Preface
About this manual ......................................................................................... xii Feedback ..................................................................................................... xvi

Chapter 1

Introduction
1.1 1.2 About the ARM9TDMI ................................................................................. 1-2 Processor block diagram ............................................................................. 1-3

Chapter 2

Programmer’s Model
2.1 2.2 About the programmer’s model ................................................................... 2-2 Pipeline implementation and interlocks ....................................................... 2-4

Chapter 3

ARM9TDMI Processor Core Memory Interface
3.1 3.2 3.3 3.4 3.5 3.6 3.7 About the memory interface ........................................................................ 3-2 Instruction interface ..................................................................................... 3-5 Endian effects for instruction fetches .......................................................... 3-7 Data interface .............................................................................................. 3-8 Unidirectional/bidirectional mode interface ............................................... 3-11 Endian effects for data transfers ............................................................... 3-12 ARM9TDMI reset behavior ........................................................................ 3-13

ARM DDI 0180A

Copyright © 2000 ARM Limited. All rights reserved.

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Contents

Chapter 4

ARM9TDMI Coprocessor Interface
4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 About the coprocessor interface ................................................................. 4-2 LDC/STC .................................................................................................... 4-3 MCR/MRC...
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