EPXA4 Datasheet, PDF (7/34 Pages) Altera Corporation – Excalibur Devices

Appendix A
Errata from ARM Ltd.
© 1999-2001 ARM Limited. All rights reserved
This appendix reproduces information supplied by ARM Ltd. on known
errata in the ARM922T^™processor and support features. The errata have
little or no impact on the use of the Excalibur device, but could be useful,
on rare occasions, in understanding its interaction with third-party
debugging tools. Many errata detail the work arounds which tool vendors
incorporate into their products, while others inform of changes in the
specification and so are included for completeness.
The information contained herein is the property of ARM Ltd. and is
supplied without liability for errors or omissions. No part may be
reproduced or used except as authorised by contract or other written
permission. The copyright and the foregoing restriction on reproduction
and use extend to all media in which this information may be embodied.
Table 1 describes the errata categories defined by ARM Ltd. and used
throughout this appendix, except for A2.1 “Invalid data trace following
FIFO overflow—Category 1” on page 9, which refers to a previous
definition of category 1 defined by ARM Ltd.
Table 1. Errata Categories
Category
Description
1 Features which are impossible to work around and severely restrict the use of the device in all or the
majority of applications rendering the device unusable.
2 Features which contravene the specified behaviour and may limit or severely impair the intended use
of specified features but does not render the device unusable in all or the majority of applications.
3 Features that were not the originally intended behaviour but should not cause any problems in
applications.
Errata for the ARM-based embedded processor are grouped by module:
■ A.1—the ARM920T AHB wrapper
■ A.2—the ETM9 trace module
■ A.3—the ARM922T processor core
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