Copyright © 2007, 2008 ARM Limited. All rights reserved.
ARM DDI 0419B
_errata
ARMv6-M Architecture
Reference Manual
ii Copyright © 2007-2009 ARM Limited. All rights reserved. ARM DDI 0419B_errata
Non-Confidential
Unrestricted Access
ARMv6-M Architecture Reference Manual
Copyright © 2007-2009 ARM Limited. All rights reserved.
Release Information
The following changes have been made to this document.
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information herein may be protected by one or more patents or pending applications. No part of this ARM Architecture
Reference Manual may be reproduced in any form by any means without the express prior written permission of ARM.
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Restricted Rights Legend: Use, duplication or disclosure by the United States Government is subject to the restrictions
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Change History
Date Issue Confidentiality Change
March 2007 A Non-Confidential First release
September 2008 B Non-Confidential, Restricted Access Additions to the System Control Block, power management support,
corrections to errata and clarifications
April 2009 B_errata Non-Confidential Errata to issue B, published only as a marked-up PDF document. See
page iii for more information.
ARM DDI 0419B_errata Copyright © 2007-2009 ARM Limited. All rights reserved. iii
Unrestricted Access Non-Confidential
This document is Non-Confidential but any disclosure by you is subject to you providing notice to and the
acceptance by the recipient of, the conditions set out above.
In this document, where the term ARM is used to refer to the company it means “ARM or any of its subsidiaries as
appropriate”.
Note
The term ARM is also used to refer to versions of the ARM architecture, for example ARMv6 refers to version 6 of the
ARM architecture. The context makes it clear when the term is used in this way.
Note
• This errata PDF is regenerated from the source files of issue B of this document, but:
— The pseudocode examples, that are inserted into the document, have been updated. Significant changes in
the pseudocode are highlighted.
— Pages ii and iii of the PDF have been replaced, by an edit to the PDF, to include an updated Proprietary
Notice.
With these exceptions, this PDF corresponds to the released PDF of issue C of the document, with errata indicated
by markups to the PDF.
• Issues A and B of this Architecture Reference Manual described a number of features of the ARMv6-M
architecture as comprising the OS Extensions. One effect of this errata PDF is to remove the definition of this
extension. This means that:
— the SP_process stack, the
SVC
instruction, and the PendSV exception become part of the baseline
ARMv6-M architecture
— the SysTick system timer and associated exception become
an optional feature of the baseline ARMv6-M
archite
cture.
iv Copyright © 2007, 2008 ARM Limited. All rights reserved. ARM DDI 0419B
Non-Confidential
Restricted Access
ARM DDI 0419B Copyright © 2007, 2008 ARM Limited. All rights reserved. v
Restricted Access Non-Confidential
Contents
ARMv6-M Architecture Reference Manual
Preface
About this manual ............................................................................... xvi
Using this manual .............................................................................. xvii
Conventions ........................................................................................ xix
Further reading .................................................................................... xx
Feedback ............................................................................................ xxi
Part A Application Level Architecture
Chapter A1 Introduction
Chapter A2 Application Level Programmers’ Model
A2.1 About the Application level programmers’ model ............................. A2-2
A2.2 ARM core data types and arithmetic ................................................ A2-3
A2.3 Registers and execution state ........................................................ A2-11
A2.4 Exceptions, faults and interrupts .................................................... A2-14
A2.5 Coprocessor support ...................................................................... A2-15
Chapter A3 Application Level Memory Model
A3.1 Address space ................................................................................. A3-2
A3.2 Alignment support ............................................................................ A3-3
