Avago Technologies LSI53C896 - Manual (Page 24)

1-6 Introduction
Version 3.3 Copyright © 1998–2003 by LSI Logic Corporation. All rights reserved.
The benefits of TolerANT technology include increased immunity to noise
when the signal is going HIGH, better performance due to balanced duty
cycles, and improved fast SCSI transfer rates. In addition, TolerANT
SCSI devices do not cause glitches on the SCSI bus at power-up or
power-down, so other devices on the bus are also protected from data
corruption. When it is used with the LVDlink transceivers, TolerANT
technology provides excellent signal quality and data reliability in real
world cabling environments. TolerANT technology is compatible with both
the Alternative One and Alternative Two termination schemes proposed
by the American National Standards Institute.
1.5 LSI53C896 Benefits Summary
This section provides an overview of the LSI53C896 features and
benefits. It contains information on
SCSI Performance , PCI Performance ,
Integration , Ease of Use , Flexibility , Reliability , and Testability .
1.5.1 SCSI Performance
The LSI53C896:
•
Has integrated LVDlink universal transceivers which:
– Support SE, LVD, and HVD signals (with external transceivers).
– Allow greater device connectivity and longer cable length.
– LVDlink transceivers save the cost of external differential
transceivers.
– Supports a long-term performance migration path.
•
With a 944 byte FIFO, the chip can efficiently burst up to 512 bytes
across the PCI bus.
•
Two separate SCSI channels on one chip.
•
Performs wide, Ultra2 SCSI synchronous transfers as fast as
80 Mbytes/s on each SCSI channel for a total of 160 Mbytes/s.
•
Can handle phase mismatches in SCRIPTS without interrupting the
system processor.
•
On-chip SCSI clock quadrupler allows the chip to achieve Ultra2
SCSI transfer rates with an input frequency of 40 MHz.