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LSI53C810A Benefits Summary 1-5
• Three programmable SCSI timers: Select/Reselect, Handshake-to-
Handshake, and General Purpose. The time-out period is
programmable from 100 µs to greater than 1.6 seconds
• SDMS software for complete PC-based operating system support
• Support for relative jump
• New SCSI Selected As ID (SSAID) bits for use when responding with
multiple IDs
1.2.5 Flexibility
The LSI53C810A provides:
• High level programming interface (SCSI SCRIPTS)
• Support for execution of tailored SCSI sequences from main system
RAM
• Flexible programming interface to tune I/O performance or to adapt
to unique SCSI devices
• Flexibility to accommodate changes in the logical I/O interface
definition
• Low level access to all registers and all SCSI bus signals
• Fetch, Master, and Memory Access control pins
• Support for indirect fetching of DMA address and byte counts so that
SCRIPTS can be placed in a PROM
• Separate SCSI and system clocks
• Selectable IRQ pin disable bit
• Ability to route system clock to SCSI clock
1.2.6 Reliability
Enhanced reliability features of the LSI53C810A include:
• 2 kV ESD protection on SCSI signals
• Typical 300 mV SCSI bus hysteresis
• Average operating supply current of 50 mA
• Protection against bus reflections due to impedance mismatches