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LVDlink™ Technology Benefits 1-5
Version 1.3 Copyright © 2000–2003 by LSI Logic Corporation. All rights reserved.
1.4 LVDlink
™
Technology Benefits
The LSI22915A supports LVD, a signaling technology that increases the
reliability of SCSI data transfers over longer distances than those supported
by SE SCSI. The low current output of LVD allows the I/O transceivers to
be integrated directly onto the chip. LVDlink technology lowers the
amplitude of noise reflections and allows higher transmission frequencies.
LVD provides a long-term migration path to even faster SCSI transfer rates
without compromising signal integrity, cable length, or connectivity.
Important: All SCSI devices on the bus must be LVD or SE. If the board
detects a High Voltage Differential (HVD) device, it puts the
SCSI bus in the high impedance state and shuts down.
1.5 TolerANT
®
Technology Benefits
The LSI53C1010 feature TolerANT technology, which includes active
negation on the SCSI drivers and input signal filtering on the SCSI
receivers. The benefits of TolerANT technology include increased noise
immunity when the signal transitions to 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. This protects other devices on the bus 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 ANSI.