AHB CPU Wrappers Technical Reference Manual

Table of Contents

About this document
Intended audience
Using this manual
Typographical conventions
Further reading
Feedback on the AHB CPU wrappers
Feedback on this document
1. Introduction
1.1. Delivery overview
1.2. CPU bus access wait states
1.2.1. Timing and critical paths
1.3. Use of ETM and coprocessor interfaces
2. ARM720T AHB Wrapper
2.1. About the ARM720T AHB wrapper
2.2. Signal interface
2.3. Description of the ARM720T wrapper blocks
2.3.1. A720T
2.3.2. A7x0TWrap
2.3.3. A7x0TWrapMaster
2.3.4. A7x0TWrapTest
2.4. Non-standard design practices
2.4.1. Clock gating
2.4.2. Transparent latches
2.4.3. Tristate drivers
2.5. Programmer’s model exceptions
3. ARM7TDMI AHB Wrapper
3.1. About the ARM7TDMI AHB wrapper
3.2. Signal interface
3.2.1. A7TWrap signals
3.2.2. A7SWrap signals
3.3. Description of the ARM7TDMI wrapper blocks
3.3.1. A7TDMI
3.3.2. A7TWrap
3.3.3. A7SAHB
3.3.4. A7SWrap
3.3.5. A7WrapSM
3.3.6. A7WrapMaster
3.3.7. A7TWrapTest
3.3.8. A7TWrapCtrl
3.4. Non-standard design practices
3.4.1. Clock gating
3.4.2. Transparent latches
4. ARM920T AHB Wrapper
4.1. About the ARM920T AHB wrapper
4.2. Signal interface
4.3. Description of the ARM920T wrapper blocks
4.3.1. A920T
4.3.2. A920TWrap
4.3.3. A920TWrapSM
4.3.4. A920TWrapMaster
4.3.5. A920TWrapSlave
4.4. Non-standard design practices
4.4.1. Clock gating
4.4.2. Transparent latches
4.5. Programmer’s model exceptions
5. ARM940T AHB Wrapper
5.1. About the ARM940T AHB wrapper
5.2. Signal interface
5.3. Description of the ARM940T wrapper blocks
5.3.1. A940T
5.3.2. A940TWrap
5.3.3. A940TWrapSM
5.3.4. A940TWrapMast
5.3.5. A940TWrapTest
5.4. Non-standard design practices
5.4.1. Clock gating
5.4.2. Transparent latches
5.4.3. Tristate drivers

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The product described in this document is subject to continuous developments and improvements. All particulars of the product and its use contained in this document are given by ARM Limited in good faith. However, all warranties implied or expressed, including but not limited to implied warranties of merchantability, or fitness for purpose, are excluded.

This document is intended only to assist the reader in the use of the product. ARM Limited shall not be liable for any loss or damage arising from the use of any information in this document, or any error or omission in such information, or any incorrect use of the product.

Confidentiality Status

This document is Non-Confidential. The right to use, copy and disclose this document may be subject to license restrictions in accordance with the terms of the agreement entered into by ARM and the party that ARM delivered this document to.

Product Status

The information in this document is final, that is for a developed product.

Revision History
Revision A18 April 2001First release.
Revision B18 May 2001Second release. New Chapter 1 added.
Revision C23 June 2003Third release. Changes to Chapter 1.
Revision D14 August 2003Corrected product number in Chapter 1.
Copyright © 2001, 2003 ARM Limited. All rights reserved.ARM DDI 0169D