LSI 53C810A 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
Handshake, and General Purpose. The time-out period is
programmable from 100
µ
s 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
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
RAM
•
Flexible programming interface to tune I/O performance or to adapt
to unique SCSI devices
to unique SCSI devices
•
Flexibility to accommodate changes in the logical I/O interface
definition
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
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