LSI LSI53C875A Manuale utente

S14047

LSI53C875A

PCI to Ultra SCSI

Controller

TECHNICAL

MANUAL

December 2000

Version 2.0

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 DB14-000143-01, Second Edition (December 2000).

This document describes the LSI Logic LSI53C875A PCI to Ultra SCSI Controller

and will remain the official reference source for all revisions/releases of this

product until rescinded by an update.

To receive product literature, visit us at http://www.lsilogic.com.

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.

Ultra SCSI is the term used by the SCSI Trade Association (STA) to describe

Fast-20 SCSI, as documented in the SCSI-3 Fast-20 Parallel Interface standard,

X3,277-199X.

TRADEMARK ACKNOWLEDGMENT

The LSI Logic logo design, TolerANT, and SCRIPTS are registered trademarks

or trademarks of LSI Logic Corporation. All other brand and product names may

be trademarks of their respective companies.

Preface iii

Preface

This book is the primary reference and technical manual for the

LSI53C875A PCI to Ultra SCSI Controller. It contains a complete

functional description for the product and also includes complete physical

and electrical specifications.

Audience

This manual provides reference information on the LSI53C875A PCI to

Ultra SCSI Controller. It is intended for system designers and

programmers who are using this device to design an Ultra SCSI port for

PCI-based personal computers, workstations, servers or embedded

applications.

Organization

This document has the following chapters and appendixes:

•Chapter 1, General Description includes general information about

the LSI53C875A.

•Chapter 2, Functional Description describes the main functional

areas of the chip in more detail, including interfaces to the SCSI bus

and external memory.

•Chapter 3, Signal Descriptions contains pin diagrams and signal

descriptions.

•Chapter 4, Registers describes each bit in the operating registers,

and is organized by register address.

•Chapter 5, SCSI SCRIPTS Instruction Set defines all of the SCSI

SCRIPTS instructions that are supported by the LSI53C875A.

iv Preface

•Chapter 6, Electrical Specifications contains the electrical

characteristics and AC timing diagrams.

•Appendix A, Register Summary is a register summary.

•Appendix B, External Memory Interface Diagram Examples contains

several example interface drawings for connecting the LSI53C875A

to external ROMs.

Related Publications

For background information, please contact:

ANSI

11 West 42nd Street

New York, NY 10036

(212) 642-4900

Ask for document number X3.131-199X (SCSI-2)

Global Engineering Documents

15 Inverness Way East

Englewood, CO 80112

(800) 854-7179 or (303) 397-7956 (outside U.S.) FAX (303) 397-2740

Ask for document number X3.131-1994 (SCSI-2); X3.253 (SCSI-3

Parallel Interface)

ENDL Publications

14426 Black Walnut Court

Saratoga, CA 95070

(408) 867-6642

Document names: SCSI Bench Reference, SCSI Encyclopedia,

SCSI Tutor

Prentice Hall

113 Sylvan Avenue

Englewood Cliffs, NJ 07632

(800) 947-7700

Ask for document number ISBN 0-13-796855-8, SCSI: Understanding

the Small Computer System Interface

LSI Logic World Wide Web Home Page

www.lsilogic.com

Preface v

PCI Special Interest Group

2575 N.E. Katherine

Hillsboro, OR 97214

(800) 433-5177; (503) 693-6232 (International); FAX (503) 693-8344

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.

Hexadecimal numbers are indicated by the prefix “0x” —for example,

0x32CF. Binary numbers are indicated by the prefix “0b” —for example,

0b0011.0010.1100.1111.

Revision Record

Revision Date Remarks

Preliminary 5/00 Preliminary draft version of the manual.

1.0 6/00 Preliminary version of the manual.

2.0 12/00 Final version of the manual.

vi Preface

Contents vii

Contents

Chapter 1 General Description

1.1 New Features in the LSI53C875A 1-3

1.2 Benefits of Ultra SCSI 1-3

1.3 TolerANT®Technology 1-4

1.4 LSI53C875A Benefits Summary 1-4

1.4.1 SCSI Performance 1-5

1.4.2 PCI Performance 1-6

1.4.3 Integration 1-6

1.4.4 Ease of Use 1-6

1.4.5 Flexibility 1-7

1.4.6 Reliability 1-8

1.4.7 Testability 1-8

Chapter 2 Functional Description

2.1 PCI Functional Description 2-2

2.1.1 PCI Addressing 2-2

2.1.2 PCI Bus Commands and Functions Supported 2-3

2.1.3 PCI Cache Mode 2-9

2.2 SCSI Functional Description 2-16

2.2.1 SCRIPTS Processor 2-17

2.2.2 Internal SCRIPTS RAM 2-18

2.2.3 64-Bit Addressing in SCRIPTS 2-19

2.2.4 Hardware Control of SCSI Activity LED 2-19

2.2.5 Designing an Ultra SCSI System 2-20

2.2.6 Prefetching SCRIPTS Instructions 2-21

2.2.7 Opcode Fetch Burst Capability 2-22

2.2.8 Load and Store Instructions 2-22

2.2.9 JTAG Boundary Scan Testing 2-23

2.2.10 SCSI Loopback Mode 2-23

viii Contents

2.2.11 Parity Options 2-24

2.2.12 DMA FIFO 2-27

2.2.13 SCSI Bus Interface 2-32

2.2.14 Select/Reselect During Selection/Reselection 2-33

2.2.15 Synchronous Operation 2-34

2.2.16 Interrupt Handling 2-37

2.2.17 Chained Block Moves 2-44

2.3 Parallel ROM Interface 2-48

2.4 Serial EEPROM Interface 2-50

2.4.1 Default Download Mode 2-50

2.4.2 No Download Mode 2-51

2.5 Power Management 2-51

2.5.1 Power State D0 2-52

2.5.2 Power State D1 2-52

2.5.3 Power State D2 2-53

2.5.4 Power State D3 2-53

Chapter 3 Signal Descriptions

3.1 LSI53C875A Functional Signal Grouping 3-2

3.2 Signal Descriptions 3-3

3.2.1 Internal Pull-ups on LSI53C875A Signals 3-3

3.3 PCI Bus Interface Signals 3-4

3.3.1 System Signals 3-4

3.3.2 Address and Data Signals 3-5

3.3.3 Interface Control Signals 3-6

3.3.4 Arbitration Signals 3-7

3.3.5 Error Reporting Signals 3-7

3.3.6 Interrupt Signal 3-8

3.4 SCSI Bus Interface Signals 3-8

3.4.1 SCSI Bus Interface Signal 3-8

3.4.2 SCSI Signals 3-9

3.4.3 SCSI Control Signals 3-9

3.5 GPIO Signals 3-10

3.6 ROM Flash and Memory Interface Signals 3-11

3.7 Test Interface Signals 3-12

3.8 Power and Ground Signals 3-13

3.9 MAD Bus Programming 3-14

Contents ix

Chapter 4 Registers

4.1 PCI Configuration Registers 4-1

4.2 SCSI Registers 4-18

4.3 64-Bit SCRIPTS Selectors 4-99

4.4 Phase Mismatch Jump Registers 4-103

Chapter 5 SCSI SCRIPTS Instruction Set

5.1 Low Level Register Interface Mode 5-1

5.2 High Level SCSI SCRIPTS Mode 5-2

5.2.1 Sample Operation 5-3

5.3 Block Move Instruction 5-6

5.3.1 First Dword 5-6

5.3.2 Second Dword 5-13

5.4 I/O Instruction 5-13

5.4.1 First Dword 5-14

5.4.2 Second Dword 5-21

5.5 Read/Write Instructions 5-22

5.5.1 First Dword 5-22

5.5.2 Second Dword 5-23

5.5.3 Read-Modify-Write Cycles 5-23

5.5.4 Move To/From SFBR Cycles 5-24

5.6 Transfer Control Instructions 5-25

5.6.1 First Dword 5-26

5.6.2 Second Dword 5-32

5.7 Memory Move Instructions 5-32

5.7.1 First Dword 5-33

5.7.2 Read/Write System Memory from SCRIPTS 5-34

5.7.3 Second Dword 5-34

5.7.4 Third Dword 5-35

5.8 Load and Store Instructions 5-35

5.8.1 First Dword 5-36

5.8.2 Second Dword 5-37

Chapter 6 Electrical Specifications

6.1 DC Characteristics 6-1

6.2 TolerANT Technology Electrical Characteristics 6-5

xContents

6.3 AC Characteristics 6-9

6.4 PCI and External Memory Interface Timing Diagrams 6-11

6.4.1 Target Timing 6-13

6.4.2 Initiator Timing 6-19

6.4.3 External Memory Timing 6-35

6.5 SCSI Timing Diagrams 6-52

6.6 Package Diagrams 6-58

Appendix A Register Summary

Appendix B External Memory Interface Diagram Examples

Index

Customer Feedback

Figures 1.1 Typical LSI53C875A System Application 1-2

1.2 Typical LSI53C875A Board Application 1-2

2.1 LSI53C875A Block Diagram 2-2

2.2 Parity Checking/Generation 2-27

2.3 DMA FIFO Sections 2-28

2.4 LSI53C875A Host Interface SCSI Data Paths 2-29

2.5 Regulated Termination for Ultra SCSI 2-33

2.6 Determining the Synchronous Transfer Rate 2-35

2.7 Block Move and Chained Block Move Instructions 2-45

3.1 LSI53C875A Functional Signal Grouping 3-2

5.1 SCRIPTS Overview 5-5

6.1 Rise and Fall Time Test Condition 6-7

6.2 SCSI Input Filtering 6-7

6.3 Hysteresis of SCSI Receivers 6-7

6.4 Input Current as a Function of Input Voltage 6-8

6.5 Output Current as a Function of Output Voltage 6-8

6.6 External Clock 6-9

6.7 Reset Input 6-10

6.8 Interrupt Output 6-11

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