LSI 53C810A Computer Hardware User Manual


 
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