USER’S GUIDE LSI20860 PCI to Ultra SCSI Host Adapter Version 1.1 January 2001 ® S14033.
Electromagnetic Compatibility Notices This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: 1. 2. This device may not cause harmful interference, and This device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
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 DB15-000129-01, Second Edition (January 2001).
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Preface This book is the primary reference and user’s guide for the LSI Logic LSI20860 PCI to Ultra SCSI Host Adapter. It contains a complete functional description for the LSI20860 and includes complete physical and electrical specifications for the LSI20860. Audience This document assumes that you have some familiarity with microprocessors and related support devices.
Related Publications LSI53C860 PCI to Ultra SCSI I/O Processor Data Manual, Order Number T09962 PCI Storage Device Management System SDMS 4.0 User’s Guide, Order Number S14007.A Revision Record Revision Date Remarks 1.0 11/99 Final version. 1.1 01/01 All product names changed from SYM to LSI.
Contents Chapter 1 Appendix A Using the LSI20860 1.1 General Description 1.1.1 Features 1.1.2 Physical Environment 1.2 Installing the LSI20860 1.3 Connecting SCSI Devices 1.3.1 Internal SCSI Bus Connections 1.3.2 External SCSI Bus Connections 1.3.3 SCSI Bus Termination 1.3.4 Setting SCSI IDs 1.4 Troubleshooting 1-1 1-1 1-3 1-5 1-7 1-8 1-9 1-10 1-12 1-12 Glossary of Terms and Abbreviations Customer Feedback Figures 1.1 1.2 1.3 1.4 1.
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Chapter 1 Using the LSI20860 This chapter contains instructions and illustrations to help you install a LSI20860 PCI to Ultra SCSI host adapter board into a PCI computer system. It includes these topics: • Section 1.1, “General Description,” page 1-1 • Section 1.2, “Installing the LSI20860,” page 1-5 • Section 1.3, “Connecting SCSI Devices,” page 1-7 • Section 1.4, “Troubleshooting,” page 1-12 1.
1.1.1.2 SCSI Interface • Supports 8-bit Single-Ended (SE) signaling only • Automatically enables SE termination • Supports SCSI termination power (TERMPWR) source • External: 50-pin high density; Internal: 50-pin low density connectors • Provides Ultra SCSI synchronous transfer capability up to 20 Mbytes/s 1.1.1.3 Board Requirements • PCI board dimensions: 2.5 x 4.
Figure 1.1 LSI20860 Board Hardware Internal SCSI Interface connector J2 P1 External SCSI Interface connector J3 J1 to PCI Mainboard connector 1.1.2 Physical Environment This section discusses the physical, electrical, thermal, and safety characteristics of the LSI20860. Additionally, this board is compliant with Class B electromagnetic standards set by the FCC. 1.1.2.1 Physical Characteristics The dimensions of the LSI20860 are 2.5 x 4.75 inches. PCI connection is made through edge connector J1.
The component height on the top and bottom of the board conforms to the PCI Specification. 1.1.2.2 Electrical Characteristics The LSI20860 maximum power requirement, including SCSI TERMPWR, under normal operation is: Table 1.1 + 5 V DC Maximum Power Requirements ± 5% 1.5 A Over the operating range 5 °C to 55 °C Under abnormal conditions such as a short on SCSI TERMPWR, +5 V current may be higher.
1.1.2.5 Safety Characteristics The bare board meets or exceeds the requirements of UL flammability rating 94 V0. The bare board is also marked with the supplier’s name or trademark, type, and UL flammability rating. Since this board is installed in a PCI bus slot, all voltages are below the SELV 42.4 V limit. 1.2 Installing the LSI20860 For safe and proper installation, check the user’s manual supplied with your computer and perform these steps.
Note: Notice that the components on a PCI host adapter face the opposite way from non-PCI adapter boards you have in your system. This is correct, and the board is keyed to go in only one way. Step 7. The bracket around the external connector J3 should fit where the blank panel was removed. Secure it with the bracket screw before making the internal and external SCSI bus connections. See Figure 1.2. Step 8.
Figure 1.2 Inserting the Host Adapter Bracket Screw 1.3 Connecting SCSI Devices The main connections to SCSI devices involve two types of connectors: • Internal 50-pin SCSI connector • External 50-pin SCSI connector The next sections provide more detailed information.
1.3.1 Internal SCSI Bus Connections This section provides step-by-step instructions about making internal SCSI bus connections. Step 1. To connect an internal SCSI device, plug the 50-pin connector on one end of the SCSI ribbon cable into the connector J2 (see Figure 1.3). The ribbon cable included in your LSI20860 kit is keyed to ensure it is connected correctly. Step 2. Plug the 50-pin connector on the other end of the SCSI ribbon cable into the SCSI connector on your internal SCSI device. Step 3.
Figure 1.3 Internal SCSI Devices Chained Together J2 1.3.2 External SCSI Bus Connections This section provides step-by-step instructions about making external SCSI bus connections. Step 1. To connect external SCSI devices to the LSI20860, plug the 50-pin connector on one end of a shielded SCSI cable into the host adapter SCSI connector J3. This connector is bracketed to the back panel of your computer. Figure 1.4 shows how this connection is made.
Step 2. Plug the 50-pin connector on the other end of the SCSI cable into the SCSI connector on the peripheral device. This connection is shown in Figure 1.4. Step 3. To connect more than one device to the LSI20860, use shielded cables to chain them together as illustrated in Figure 1.4. Figure 1.4 Multiple External Devices Chained Together 1.3.3 SCSI Bus Termination All SCSI devices have a set of resistors called terminators to assure reliable operation of the SCSI bus.
are connected serially (chained together) with SCSI cables. The first and last physical devices connected on the ends of the SCSI bus must have these terminators enabled. All other SCSI devices on the bus must have their terminators removed or disabled. Termination on the LSI20860 is automatically enabled when it is connected to the end of the bus. Refer to the SCSI device documentation for information on how to identify and change the terminator setting on each SCSI peripheral device. Figure 1.
1.3.4 Setting SCSI IDs Each device on the SCSI bus, including the host adapter, must have a unique SCSI ID from 0 through 7. SCSI ID 7 is the preset host adapter setting, giving it the highest priority on the SCSI bus. Refer to your peripheral device documentation for instructions on how to determine and change the ID of each peripheral device. Caution: The LSI20860 supports only SE SCSI devices. Differential SCSI devices may be damaged if you connect them to this host adapter.
The device driver does not see one of the SCSI devices. 1. Reboot the computer. 2. Make sure the SCSI devices have different ID numbers (the boot drive should have the lowest ID). 3. Make sure both ends, but only the ends, of the SCSI bus are terminated. 4. Check the cable and power connections.
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Appendix A Glossary of Terms and Abbreviations Bus A collection of unbroken signal lines across which information is transmitted from one part of a computer system to another. Connections to the bus are made using taps or connectors on the lines. Bus Mastering A high-performance way to transfer data. The host adapter controls the transfer of data directly to and from system memory without bothering the computer’s microprocessor. This is the fastest way for multitasking operating systems to transfer data.
Host Adapter A circuit board or integrated circuit that provides a SCSI bus connection to the computer system. Internal SCSI Device A SCSI device installed inside the computer cabinet. These devices are connected in a continuous chain using an unshielded ribbon cable. IRQ Interrupt Request Channel. A path through which a device can get the immediate attention of the computer’s CPU. The PCI bus assigns an IRQ path for each SCSI host adapter.
Port Number See Port Address. RAM Random Access Memory. The computer’s primary working memory in which program instructions and data are stored and are accessible to the CPU. Information can be written to and read from RAM. The contents of RAM are lost when the computer is turned off. ROM Read Only Memory. Memory from which information can be read but not changed. The contents of ROM are not erased when the computer is turned off. SCSI Small Computer System Interface.
Single-Ended SCSI A hardware specification for connecting SCSI devices. It references each SCSI signal to a common ground. This is the most common method (as opposed to differential SCSI which uses a separate ground for each signal). Termination The electrical connection required at each end of the SCSI bus, composed of a set of resistors. It improves the integrity of bus signals. Ultra SCSI A standard for SCSI data transfers.
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