ARM Cortex-M7 Devices Generic User Guide

315 Pages·2015·1.92 MB·English

ARM® Cortex®-M7 Devices
Generic User Guide
Copyright ©2015 ARM. All rights reserved.
ARM DUI 0646B (ID082615)
ARM Cortex-M7 Devices
Generic User Guide
Copyright ©2015 ARM. All rights reserved.
Release Information
The following changes have been made to this book.
Change history
Date Issue Confidentiality Change
19-March-2015 A Non-Confidential First release for r1p0
07-July-2015 B Non-Confidential First release for r1p1
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Contents
ARM Cortex-M7 Devices Generic User Guide
Preface
About this book .......................................................................................................... vii
Feedback ..................................................................................................................... x
Chapter 1 Introduction
1.1 About the Cortex-M7 processor and core peripherals ............................................. 1-2
Chapter 2 The Cortex-M7 Processor
2.1 Programmers model ................................................................................................ 2-2
2.2 Memory model ....................................................................................................... 2-12
2.3 Exception model .................................................................................................... 2-19
2.4 Fault handling ........................................................................................................ 2-27
2.5 Power management ............................................................................................... 2-31
Chapter 3 The Cortex-M7 Instruction Set
3.1 Instruction set summary ........................................................................................... 3-2
3.2 CMSIS functions .................................................................................................... 3-12
3.3 About the instruction descriptions .......................................................................... 3-14
3.4 Memory access instructions .................................................................................. 3-24
3.5 General data processing instructions .................................................................... 3-42
3.6 Multiply and divide instructions .............................................................................. 3-82
3.7 Saturating instructions ......................................................................................... 3-104
3.8 Packing and unpacking instructions .................................................................... 3-116
3.9 Bit field instructions .............................................................................................. 3-123
3.10 Branch and control instructions ........................................................................... 3-127
3.11 Floating-point instructions .................................................................................... 3-135
3.12 Miscellaneous instructions ................................................................................... 3-172
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Contents
Chapter 4 Cortex-M7 Peripherals
4.1 About the Cortex-M7 peripherals ............................................................................. 4-2
4.2 Nested Vectored Interrupt Controller ....................................................................... 4-3
4.3 System control block .............................................................................................. 4-11
4.4 System timer, SysTick ........................................................................................... 4-33
4.5 Processor features ................................................................................................. 4-37
4.6 Optional Memory Protection Unit ........................................................................... 4-43
4.7 Floating Point Unit ................................................................................................. 4-55
4.8 Cache maintenance operations ............................................................................. 4-61
4.9 Access control ....................................................................................................... 4-66
Appendix A Cortex-M7 Options
A.1 Cortex-M7 processor options ................................................................................... A-2
Appendix B Revisions
Glossary
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Preface
This preface introduces the Cortex®-M7 Devices Generic User Guide. It contains the following
sections:
• About this book on pagevii.
• Feedback on pagex.
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Preface
About this book
This book is a generic user guide for devices that implement the ARM Cortex-M7 processor.
Implementers of Cortex-M7 designs make a number of implementation choices, that can affect
the functionality of the device. This means that, in this book:
• Some information is described as implementation defined. This can be a function, mode,
range, value or setting that an ARM partner can choose to configure at implementation.
• Some features are described as optional. This can be a function, component, mode, value
or setting that the ARM partner can choose to include at implementation.
See the Glossary for a description of the term implementation defined.
In this book, unless the context indicates otherwise:
Processor Refers to the Cortex-M7 processor, as supplied by ARM.
Device Refers to an implemented device, supplied by an ARM partner, that incorporates
a Cortex-M7 processor. In particular, your device refers to the particular
implementation of the Cortex-M7 that you are using. Some features of your
device depend on the implementation choices made by the ARM partner that
made the device.
Product revision status
The rnpn identifier indicates the revision status of the product described in this book, where:
rn Identifies the major revision of the product, for example r1.
pn Identifies the minor revision or modification status of the product, for example
p2.
Intended audience
This book is written for application and system-level software developers, familiar with
programming, who want to program a device that includes the Cortex-M7 processor.
Using this book
This book is organized into the following chapters:
Chapter1 Introduction
Read this for an introduction to the Cortex-M7 processor and its features.
Chapter2 The Cortex-M7 Processor
Read this for information about how to program the processor, the processor
memory model, exception and fault handling, and power management.
Chapter3 The Cortex-M7 Instruction Set
Read this for information about the processor instruction set.
Chapter4 Cortex-M7 Peripherals
Read this for information about Cortex-M7 core peripherals.
AppendixA Cortex-M7 Options
Read this for information about the processor implementation and configuration
options.
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Preface
AppendixB Revisions
Read this for a list of the technical changes between released issues of this book.
Glossary Read this for definitions of terms used in this book.
Typographical conventions
The following table describes the typographical conventions:
Typographical conventions
Style Purpose
italic Introduces special terminology, denotes 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.
monospace italic Denotes arguments to monospace text where the argument is to be replaced by a specific value.
monospace bold Denotes language keywords when used outside example code.
<and> Encloses replaceable terms for assembler syntax where they appear in code or code fragments. For example:
MRC p15, 0 <Rd>, <CRn>, <CRm>, <Opcode_2>
SMALL CAPITALS Used in body text for a few terms that have specific technical meanings, that are defined in the ARM® Glossary.
For example, IMPLEMENTATION DEFINED, IMPLEMENTATION SPECIFIC, UNKNOWN, and UNPREDICTABLE.
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Preface
Additional reading
This section lists publications by ARM and by third parties.
See Infocenter, http://infocenter.arm.com, for access to ARM documentation.
See on ARM, www.arm.com/cmsis, for embedded software development resources including the
Cortex® Microcontroller Software Interface Standard (CMSIS).
ARM publications
This book contains information that is specific to this product. See the following documents for
other relevant information:
• Cortex®-M7 Technical Reference Manual (ARM DDI 0489).
• ARM®v7-M Architecture Reference Manual (ARM DDI 0403).
Other publications
This guide only provides generic information for devices that implement the ARM Cortex-M7
processor. For information about your device see the documentation published by the device
manufacturer.
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Preface
Feedback
ARM welcomes feedback on this product and its documentation.
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• The number, ARM DUI 0646B.
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