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三星ARM启动代码方法
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ARM启动代码工作原理,对于学习和使用三星ARM处理器会很有帮助
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1
Confidential Proprietary of Samsung Electronics Co., Ltd
Copyright © 2008 Samsung Electronics, Inc. All Rights Reserved
Application Note
(Internal ROM Booting)
S3C2450X
RISC Microprocessor
June 25, 2008
Preliminary REV 0.03
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
SMDK2450_IROM_APPLICATION NOTE_REV 0.03
2
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
Samsung Confidential
Important Notice
The information in this publication has been carefully
checked and is believed to be entirely accurate at the
time of publication. Samsung assumes no
responsibility, however, for possible errors or
omissions, or for any consequences resulting from the
use of the information contained herein.
Samsung reserves the right to make changes in its
products or product specifications with the intent to
improve function or design at any time and without
notice and is not required to update this
documentation to reflect such changes.
This publication does not convey to a purchaser of
semiconductor devices described herein any license
under the patent rights of Samsung or others.
Samsung makes no warranty, representation, or
guarantee regarding the suitability of its products for
any particular purpose, nor does Samsung assume
any liability arising out of the application or use of any
product or circuit and specifically disclaims any and all
liability, including without limitation any consequential
or incidental damages.
“Typical” parameters can and do vary in different
applications. All operating parameters, including
“Typicals” must be validated for each customer
application by the customer’s technical experts.
Samsung products are not designed, intended, or
authorized for use as components in systems
intended for surgical implant into the body, for other
applications intended to support or sustain life, or for
any other application in which the failure of the
Samsung product could create a situation where
personal injury or death may occur.
Should the Buyer purchase or use a Samsung product
for any such unintended or unauthorized application,
the Buyer shall indemnify and hold Samsung and its
officers, employees, subsidiaries, affiliates, and
distributors harmless against all claims, costs,
damages, expenses, and reasonable attorney fees
arising out of, either directly or indirectly, any claim of
personal injury or death that may be associated with
such unintended or unauthorized use, even if such
claim alleges that Samsung was negligent regarding
the design or manufacture of said product
.
S3C2450X RISC Microprocessor
IROM(Internal ROM) Booting Application Note, Preliminary Revision 0.03
Copyright © 2007-2008 Samsung Electronics Co.,Ltd.
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in
any form or by any means, electric or mechanical, by photocopying, recording, or otherwise, without the prior
written consent of Samsung Electronics Co.,Ltd.
Samsung Electronics Co., Ltd.
San #24 Nongseo-Dong, Giheung-Gu
Yongin-City Gyeonggi-Do, Korea
446-711
Home Page:
http://www.samsungsemi.com/
E-Mail:
mobilesol.cs@samsung.com
Printed in the Republic of Korea
SMDK2450_IROM_APPLICATION NOTE_REV 0.03
3
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
Samsung Confidential
Revision History
Revision No Description of Change Refer to Author(s) Date
0.00 - Initial release for review - Gr.Moon Jan 16, 2008
0.01 - Circuit Check Point Gr.Moon April 25, 2008
0.02 - Clock Configuration Gr.Moon May 13, 2008
0.021 - eMMC Gr.Moon June 4, 2008
0.03 - GPA/GPK ports configuration in Group Gr.Moon June 25, 2008
NOTE: Revised parts are written in blue.
SMDK2450_IROM_APPLICATION NOTE_REV 0.03
4
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
Samsung Confidential
Table of Contents
1 Overview................................................................................................................ 5
1.1 H/W Feature........................................................................................................................................ 5
1.2 Feature................................................................................................................................................ 5
1.3 Advantage of I-Rom booting ............................................................................................................... 5
1.4 Circuit Design Check Point ................................................................................................................. 6
1.5 Version................................................................................................................................................ 7
2 Operation ............................................................................................................... 8
2.1 Operating Sequence........................................................................................................................... 8
2.2 IROM(BL0) boot-up sequence............................................................................................................ 9
2.3 IROM(BL0) boot-up diagram .............................................................................................................. 10
2.4 Memory Map ....................................................................................................................................... 11
2.5 Global Variable ................................................................................................................................... 11
2.6 Device Copy Function......................................................................................................................... 12
2.7 Clock Configuration............................................................................................................................. 15
3 Circuit Description with SMDK Board..................................................................... 16
3.1 IROM Jumper Configuration (refer to S3C2450 cpu board schematic) ............................................. 16
3.2 IROM Booting Device Configuration................................................................................................... 16
4 Error handling ........................................................................................................ 17
4.1 Nand ECC failure................................................................................................................................ 17
4.2 Verification failure of BL1 integrity (Secure boot mode only).............................................................. 18
5. How to Program nand flash without Gang writer................................................... 19
5.1 Block Diagram..................................................................................................................................... 19
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