ii
Ver. 2.1
Copyright 19982001 by LSI Logic Corporation. All rights reserved.
This document contains proprietary information of LSI Logic Corporation. The
information contained herein is not to be used by or disclosed to third parties
without the express written permission of an officer of LSI Logic Corporation.
LSI Logic products are not intended for use in life-support appliances, devices,
or systems. Use of any LSI Logic product in such applications without written
consent of the appropriate LSI Logic officer is prohibited.
Document DB14-000087-02, Third Edition (September 2001)
This document describes the LSI Logic LSI53C140 Ultra2 SCSI Bus Expander
and will remain the official reference source for all revisions/releases of this
product until rescinded by an update.
LSI Logic Corporation reserves the right to make changes to any products herein
at any time without notice. LSI Logic does not assume any responsibility or
liability arising out of the application or use of any product described herein,
except as expressly agreed to in writing by LSI Logic; nor does the purchase or
use of a product from LSI Logic convey a license under any patent rights,
copyrights, trademark rights, or any other of the intellectual property rights of
LSI Logic or third parties.
Copyright 19982001 by LSI Logic Corporation. All rights reserved.
TRADEMARK ACKNOWLEDGMENT
The LSI Logic logo design, LVDlink, and TolerANT are trademarks or registered
trademarks of LSI Logic Corporation. All other brand and product names may be
trademarks of their respective companies.
MH
To receive product literature, visit us at http://www.lsilogic.com.
For a current list of our distributors, sales offices, and design resource
centers, view our web page located at
http://www.lsilogic.com/contacts/na_salesoffices.html
LSI53C140 Ultra2 SCSI Bus Expander
iii
Ver. 2.1
Copyright 19982001 by LSI Logic Corporation. All rights reserved.
Preface
This manual provides a description and electrical characteristics of the
LSI53C140 Ultra2 SCSI Bus Expander chip that supports all
combinations of Single-Ended, Low Voltage Differential, and High
Voltage Differential SCSI bus conversions.
Audience
This document assumes that you have some familiarity with
microprocessors and related support devices. The people who benefit
from this book are:
Engineers and managers who are evaluating the processor for
possible use in a system
Engineers who are designing the processor into a system
Organization
This document has the following chapters and appendixes:
Chapter 1, Using the LSI53C140
, contains general information
about the LSI53C140.
Chapter 2, Functional Descriptions
, describes the main functional
areas of the chip in more detail, including the interfaces to the SCSI
bus and external memory.
Chapter 3, LSI53C140 Specifications
, contains the pin diagram,
BGA diagram, signal descriptions, electrical characteristics, AC
timing diagrams, and mechanical drawing of the LSI53C140.
Appendix A, Wiring Diagrams
, contain wiring diagrams that show
typical LSI53C140 usage. It also contains an LSI53C140 Differential
Mode wiring diagram.
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Preface
Ver. 2.1
Copyright 19982001 by LSI Logic Corporation. All rights reserved.
Appendix B, Board Design Considerations
, describes LSI53C180
as a drop in replacement for the LSI53C140.
Appendix C, Glossary
, contains commonly used terms and their
definitions.
Revision Record
Conventions Used in This Manual
The word assert means to drive a signal true or active. The word
deassert means to drive a signal false or inactive. Signals that are active
LOW end in an "n."
Version
Date
Description
0.5
5/98
First draft of complete technical manual.
1.0
6/99
Miscellaneous. changes/corrections for product information
2.0
4/01
All product names changed from a SYM to an LSI prefix.
192-ball BGA information added in Chapter 3. Refer to
Appendix B for more detailed information. Updated DC
electrical specifications and test conditions.
2.1
9/01
Add differential mode wiring diagram to Appendix A per
system engineer.
LSI53140 Ultra2 SCSI Bus Expander
v
Ver. 2.1
Copyright 19982001 by LSI Logic Corporation. All rights reserved.
Contents
Chapter 1
Using the LSI53C140
1.1
General Description
1-1
1.2
Applications
1-3
1.2.1
Features
1-6
1.2.2
Specifications
1-7
1.3
Benefits of LVDlink
1-7
Chapter 2
Functional Descriptions
2.1
Interface Signal Descriptions
2-1
2.1.1
SCSI A Side and B Side Control Blocks
2-2
2.1.2
Retiming Logic
2-4
2.1.3
Precision Delay Control
2-5
2.1.4
State Machine Control
2-5
2.1.5
DIFFSENS Receiver
2-5
2.1.6
Dynamic Transmission Mode Changes
2-6
2.2
SCSI Signal Descriptions
2-6
2.2.1
Data and Parity (SD and SDP)
2-7
2.2.2
SCSI Bus Activity LED (BSY_LED)
2-8
2.2.3
Select Control (SSEL)
2-8
2.2.4
Busy Control (SBSY)
2-9
2.2.5
Reset Control (SRST)
2-9
2.2.6
Request and Acknowledge Control
(SREQ and SACK)
2-10
2.2.7
Control/Data, Input/Output, Message, and
Attention Controls (SCD, SIO, SMSG, and SATN)
2-11
2.2.8
Differential Direction Control
2-11
2.2.9
A and B HVD Mode (A_HVD_MODE and
B_HVD_MODE)
2-12
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