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LSI 20160 1.3 Ultra160 SCSI Beneﬁts, 1.2.3 Board Characteristics, 1.2.4SCSI Activity LED Interface, 1.3.1 Double Transition (DT) Clocking

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1.2.3 Board Characteristics

The board characteristics are

•PCI board dimensions Approximately 4.721 x 2.536 inches

•Universal 32-bit PCI card edge connector

•Standard bracket available

1.2.4SCSI Activity LED Interface

The J3 connector is a four-wire arrangement on the LSI20160 that represents the SCSI activity LED interface. Table 3.5 on page 3-8lists the signal name and pin numbers for this LED interface.

1.3 Ultra160 SCSI Beneﬁts

Ultra160 SCSI is an extension of the SPI-3 draft standard that allows faster synchronous SCSI data transfer rates than Ultra2 SCSI. When enabled, Ultra160 SCSI performs 80 megatransfers per second resulting in approximately double the synchronous data transfer rates of Ultra2 SCSI. The LSI53C1000 performs 16-bit, Ultra160 SCSI synchronous data transfers as fast as 160 Mbytes/s. This advantage is most noticeable in heavily loaded systems or large block size applications such as video on-demand and image processing.

1.3.1 Double Transition (DT) Clocking

The Ultra160 data transfer speed is accomplished using DT clocking. DT clocking refers to transferring data on both rising and falling edges of the request and acknowledge signals. Double-edge clocking doubles data transfer speeds without increasing the clock rate.

1-4	Describing the LSI20160

Copyright © 2001 by LSI Logic Corporation. All rights reserved.

Contents

USER’S GUIDE Electromagnetic Compatibility Notices Page Page Preface Related Publications Revision History Contents Appendix A Glossary of Terms and Abbreviations Customer Feedback Figures Page Tables Page Describing the LSI20160 1.1General Description 1.2 Features 1.2.1 PCI Interface 1.2.2 SCSI Interface 1.2.3 Board Characteristics 1.2.4SCSI Activity LED Interface 1.3 Ultra160 SCSI Beneﬁts 1.3.1 Double Transition (DT) Clocking 1.3.2 Cyclic Redundancy Check (CRC) 1.3.3 Asynchronous Information Protection (AIP) 1.4 SureLINK™ Ultra160 SCSI Domain Validation Beneﬁts 1.5 LVDlink™ Technology Beneﬁts 1.6 TolerANT® Technology Beneﬁts Installing the LSI20160 2.1Quick Installation Procedure 2.2 Detailed Installation Procedure 2.2.1 Before You Start 2.2.2 Selecting a PCI Slot 2.2.3 Inserting the Host Adapter Figure 2.2 Inserting the Host Adapter 2.2.4 Connecting SCSI Peripherals 2.2.4.1 Making Internal SCSI Bus Connections Figure 2.4 Internal SCSI Ribbon Cable to Host Adapter Figure 2.5 Internal SCSI Ribbon Cable to Internal SCSI Device Connection Figure 2.6 Connecting Additional Internal SCSI Devices Figure 2.7 Multiple Internal SCSI Devices Chained Together 2.2.4.2 Making Activity LED Connection Figure 2.8 SCSI LED Connector 2.2.4.3 Making External SCSI Bus Connections Figure 2.9 External Cable to Host Adapter Figure 2.10 External Cable to External SCSI Device Figure 2.11 Multiple External SCSI Devices Chained Together 2.2.5 SCSI Bus Termination 2.2.5.1 Internal SCSI Terminations Figure 2.12 Internal SCSI Device Termination 2.2.5.2 External SCSI Terminations Figure 2.13 External SCSI Device Termination 2.2.6 Setting SCSI IDs Table 2.1 SCSI ID Record 2.3 Completing the Installation Technical Speciﬁcations 3.1Physical Environment 3.1.1 Physical Characteristics 3.1.2Electrical Characteristics 3.1.3 Thermal, Atmospheric Characteristics 3.1.4Electromagnetic Compliance 3.1.5 Safety Characteristics 3.2 Operational Environment 3.2.1 The PCI Interface Table 3.2 PCI Connector J1 (Front)1 Table 3.3 PCI Connector J1 (Back)1 3.2.2 The SCSI Interface 3.2.3 The LED Interface 3.3 Subsystem ID and Subsystem Vendor ID Page Appendix A Glossary of Terms and Abbreviations Bus Mastering Byte CISPR Conﬁguration CRC Dword EEPROM EISA External SCSI Device IRQ ISA Kbyte Local Bus Logical Unit NVRAM Operating System Parity Checking Passive PC99 RAM RISC Core ROM SCAM SCSI SCRIPTS Processor SDMS Single-Ended STA SureLINK Ultra160 SCSI VCCI VDE VHDCI Virtual Memory Index Page Customer Feedback Reader’s Comments http://www.lsilogic.com/contacts/na_salesofﬁces.html