ARM9TDMI 查看數據表（PDF） - Unspecified

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ARM9TDMI

ARM9TDMI Processor Core

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Preface

About this manual

This is the Technical Reference Manual (TRM) for the ARM9TDMI microprocessor.

The ARM9TDMI includes the following features:

• The option, selectable using the UNIEN signal, of using two unidirectional buses

DD[31:0] and DDIN[31:0], instead of a single bidirectional data bus. This is

described in Unidirectional/bidirectional mode interface on page 3-11.

• The value returned by the JTAG TAP controller IDCODE instruction is the value

present on the new TAPID[31:0] input bus. This allows the ID code to be easily

changed for each chip design.

Intended audience

This manual is written for experienced hardware and software engineers who might or

might not have experience of ARM products.

Conventions

Conventions that this manual can use are described in:

• Typographical

• Timing diagrams on page xiii

• Signals on page xiii

• Numbering on page xiv.

Typographical

The typographical conventions are:

italic

Highlights important notes, introduces special terminology,

denotes internal cross-references, and citations.

bold

Highlights interface elements, such as menu names. Denotes

signal names. Also used for terms in descriptive lists, where

appropriate.

monospace

Denotes text that you can enter at the keyboard, such as

commands, file and program names, and source code.

monospace

Denotes a permitted abbreviation for a command or option. You

can enter the underlined text instead of the full command or option

name.

xii

Copyright © 2000 ARM Limited. All rights reserved.

ARM DDI 0180A

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