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LSI53C810A PCI to SCSI I/O Processor 2-1
Chapter 2
Functional Description
Chapter 2 is divided into the following sections:
• Section 2.1, “SCSI Core”
• Section 2.2, “SCRIPTS Processor”
• Section 2.3, “Prefetching SCRIPTS Instructions”
• Section 2.4, “PCI Cache Mode”
• Section 2.5, “Parity Options”
• Section 2.6, “SCSI Bus Interface”
• Section 2.7, “Interrupt Handling”
The LSI53C810A contains three functional blocks: the SCSI Core, the
DMA Core, and the SCRIPTS Processor. The LSI53C810A is fully
supported by the SDMS, a complete software package that supports the
LSI Logic product line of SCSI processors and controllers.
2.1 SCSI Core
The SCSI core supports synchronous transfer rates up to 10 Mbytes/s
and asynchronous transfer rates up to 7 Mbytes/s on an 8-bit SCSI bus.
The SCSI core can be programmed with SCSI SCRIPTS, making it easy
to fine tune the system for specific mass storage devices or advanced
SCSI requirements.
The SCSI core offers low-level register access or a high-level control
interface. Like first generation SCSI devices, the LSI53C810A SCSI core
can be accessed as a register-oriented device. The ability to sample
and/or assert any signal on the SCSI bus can be used in error recovery