Avago Technologies LSI53C140 - Manual (Page 11)

LSI53C140 Ultra2 SCSI Bus Expander 1-1
Ver. 2.1 Copyright © 1998–2001 by LSI Logic Corporation. All rights reserved.
Chapter 1
Using the LSI53C140
This chapter describes the LSI53C140 Ultra2 SCSI Bus Expander and
its applications. It includes these topics:
•
Section 1.1, “General Description,” page 1-1
•
Section 1.2, “Applications,” page 1-3
•
Section 1.3, “Benefits of LVDlink,” page 1-7
1.1 General Description
The LSI53C140 is a single chip solution allowing the extension of SCSI
device connectivity and/or cable length limits. A SCSI bus expander
couples bus segments together without any impact to the SCSI protocol,
software, or firmware. The LSI53C140 connects Single-Ended (SE) Ultra,
Low Voltage Differential (LVD) Ultra2, or High Voltage Differential (HVD)
peripherals together in any combination.
The LSI53C140 is capable of supporting any combination of bus mode
SE, HVD, or LVD on either the A or B Side port. This provides the system
designer with maximum flexibility in designing SCSI backplanes to
accommodate any SCSI bus mode.
Figure 1.1 shows the three SCSI bus modes available on the A or B
Side. LVDlink
™
transceivers provide the multimode LVD, SE, or HVD
capability.