LSI SYM8953U manual PCI Interface

Page 14

1.3.1 The PCI Interface

PCI, a high-speed standard local bus, interfaces I/O components to the processor and memory subsystems in equipment ranging from PCs to servers. The PCI functionality for the SYM8953U is contained within the Symbios SYM53C895A PCI to Ultra2 Controller with LVD Link Universal Transceivers. The SYM53C895A connects directly to the PCI bus and generates signal timing and bus protocol in compliance with the PCI Specification Revision 2.2.

The PCI interface operates as a 32-bit DMA bus master capable of

64-bit addressing. The connection is made through edge connector J1, shown in Figure 2.1. The signal definitions and pin numbers conform to the PCI Local Bus Specification Revision 2.2 standard. The SYM8953U host adapter conforms to the PCI universal signaling environment for a 5 V or 3.3 V PCI bus.

1.3.2 The SCSI Interface

The SCSI functionality for the SYM8953U is contained within the SYM53C895A. This chip is a PCI to Ultra2 SCSI Controller with LVD Link Universal Transceivers. It connects directly to the SCSI bus and generates signal timing and bus protocol in compliance with SCSI standards.

The SCSI interface on the SYM8953U operates as an 8-bit or 16-bit interface. It supports 8-bit or 16-bit, synchronous and asynchronous, LVD or SE, Fast, Ultra and Ultra2 SCSI protocols in various combinations. The interface is made through connectors J2 and J3 (see Figure 2.1). Internal connector J2 is a 68-pin HD right angle latching connector. External connector J3 is a shielded 68-pin HD right angle connector exposed in the back panel bracket. An on-board LED (labeled Activity) indicates SCSI bus activity. LVD/SE dual mode, active termination is provided on the SYM8953U board. Termination is automatically disabled when both SCSI connectors are used. The SYM8953U supplies SCSI bus TERMPWR through a blocking diode and a self-resetting 1.5 A short circuit protection device. A 40 MHz oscillator is installed on the SYM8953U to provide the clock frequency to the SYM53C895A that is necessary to support Ultra2 SCSI transfers of up to 80 Mbytes/s.

1-4

Using the SYM8953U Host Adapter

Image 14
Contents User’s Guide DecemberElectromagnetic Compatibility Notices Iii Page Contents Appendix a Technical Specifications Tables ViiiContents Organization PrefaceAudience Related Publications Chapter Using the SYM8953U Host Adapter General DescriptionScsi Interface FeaturesPCI Interface Board Characteristics Interface DescriptionsPCI Interface Benefits of LVD Link Ultra2 Scsi TechnologyLVD Link Technology On-Board LED Chapter Installing the SYM8953U Host Adapter Quick Installation ProcedureInstalling the SYM8953U Host Adapter Detailed Installation Procedure Before You StartInserting the Host Adapter Hardware Connections for the SYM8953U Host Adapter Inserting the Host Adapter Connecting the Scsi Peripherals Scsi Bus Widths and SpeedsScsi Bus Lengths LVDScsi Cables Making Internal Scsi Bus Connections Internal Scsi Ribbon Cable to Host Adapter ConnectionDetailed Installation Procedure Connecting Additional Internal Scsi Devices Multiple Internal Scsi Devices Chained Together Scsi LED Connector Making External Scsi Bus Connections External Cable to Host Adapter10 External Scsi Device Cable 11 Multiple External Scsi Devices Chained Together Scsi Bus Termination Internal Bus Connections 12 Internal Scsi Device TerminationExternal Bus Connections 13 External Scsi Device TerminationInternal and External Bus Connections 14 Internal and External Scsi Device TerminationSetting Scsi IDs Scsi ID Record Completing the Installation Verify Installation Procedures DoneChapter Configuring the SYM8953U Host Adapter Overview of the Scsi Bios Configuration UtilityStarting the Configuration Utility Using the Menus Symbios Scsi Bios Configuration Utility MenusExiting the Scsi Bios Configuration Utility Configuration Commands Main MenuMain Menu Main Menu Fields and DescriptionsAdapter Properties Menu NVMAdapter Properties Menu Adapter Properties Fields and Descriptions Field Field Type Descriptions ValueIs moved between adapters from different vendors Device Properties Menu Device Properties Menu Left Half Device Properties Menu Right Half Device Properties Fields and Descriptions Field Field Type Description ValueForever should an operation fail Boot Adapter List Menu Boot Adapter List Menu Boot Adapter List Fields and Descriptions Global Properties Menu Global Properties MenuGlobal Properties Fields and Descriptions Exit Menu Exit MenuSymbios Scsi Bios Configuration Utility Menus Configuring the SYM8953U Host Adapter Physical Environment Appendix a Technical SpecificationsPhysical Characteristics Electrical Characteristics Table A.1 Maximum Power RequirementsOperational Environment Thermal, Atmospheric CharacteristicsSafety Characteristics Electromagnetic CompliancePCI Interface Table A.2 PCI Connector J1 Front Signal Name PinTable A.3 PCI Connector J1 Back Scsi Interface Table A.4 Internal Scsi Connector J2 SDP1+ SDP1−Table A.5 External Scsi Connector J3 Table A.6 LED Connector J4 Scsi Busy LEDAppendix B Glossary of Terms Abbreviations Master ConfigurationDMA Bus Device DriverHard Disk FileFirmware HostMotherboard Main MemoryMbyte MultitaskingQueue Tags Port AddressPort Number Risc CoreProcessor System BiosScsi Device Single-EndedWide Scsi Ultra2 ScsiVirtual Memory Wide Ultra ScsiGlossary of Terms and Abbreviations Index IX-1IX-2Index Customer Feedback Reader’s Comments Excellent Good Average Fair PoorDistributors by State CaliforniaNew York Direct Sales Representatives by State Component and HAB Sales Offices and Design Resource Centers InternationalInternational Distributors