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Contents
vii
Chapter 1
General Description
1.1
Package and Feature Options
1-4
1.2
Benefits of Ultra SCSI
1.3
TolerANT
®
Technology
1-5
1.4
LSI53C875 Benefits Summary
1-6
1.4.1
SCSI Performance
1.4.2
PCI Performance
1-7
1.4.3
Integration
1.4.4
Ease of Use
1.4.5
Flexibility
1-8
1.4.6
Reliability
1-9
1.4.7
Testability
Chapter 2
Functional Description
2.1
SCSI Functional Description
2-1
2.1.1
SCSI Core
2.1.2
DMA Core
2-2
2.1.3
SCRIPTS Processor
2.1.4
Internal SCRIPTS RAM
2-3
2.1.5
SDMS Software: The Total SCSI Solution
2.2
Designing an Ultra SCSI System
2-4
2.2.1
Using the SCSI Clock Doubler
2.3
Prefetching SCRIPTS Instructions
2-5
2.3.1
Opcode Fetch Burst Capability
2-6
2.4
External Memory Interface
2.5
PCI Cache Mode
2-8
2.5.1
Load/Store Instructions
2.5.2
3.3 V/5 V PCI Interface
2-9
2.5.3
Additional Access to General Purpose Pins