901 San Antonio Road
Palo Alto, CA 94303 USA
Part No.: 805-0087-01
Copyright © 1997 Sun Microsystems, Inc. All Rights reserved.
THE INFORMATION CONTAINED IN THIS DOCUMENT IS PROVIDED"AS IS" WITHOUT ANY EXPRESS REPRESENTATIONS OR WARRANTIES. IN
ADDITION, SUN MICROSYSTEMS, INC. DISCLAIMS ALL IMPLIED REPRESENTATIONS AND WARRANTIES, INCLUDING ANY WARRANTY OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS.
This document contains proprietary information of Sun Microsystems, Inc. or under license from third parties. No part of this document may be reproduced in any form
or by any means or transferred to any third party without the prior written consent of Sun Microsystems, Inc.
Sun, Sun Microsystems and the Sun Logo are trademarks or registered trademarks of Sun Microsystems, Inc. in the United States and other countries. All SPARC
trademarks are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the United States and other countries. Products bearing
SPARC trademarks are based upon an architecture developed by Sun Microsystems, Inc.
The information contained in this document is not designed or intended for use in on-line control of aircraft, air traffic, aircraft navigation or aircraft communications; or
in the design, construction, operation or maintenance of any nuclear facility. Sun disclaims any express or implied warranty of fitness for such uses.
A Brief History of SPARC and PCI xxxviii
How to Use This Book xxxix
Textual Conventions xxxix
1. UltraSPARC-IIi Basics
1.1 Overview 1
1.2 Design Philosophy 2
1.3 Component Description 3
PCI Bus Module (PBM) 5
IO Memory Management Unit (IOM) 6
External Cache Control Unit (ECU) 6
1.3.4 Memory Controller Unit (MCU) 7
Instruction Cache (I-cache)
Data Cache (D-cache)