Avago Technologies LSI53C320 - Manual (Page 17)

Benefits of TolerANT
®
Technology 1-7
Version 2.2 Copyright © 2003 by LSI Logic Corporation. All rights reserved.
1.6 Benefits of TolerANT
®
Technology
The LSI53C1320 features TolerANT technology, which provides active
negation on the SCSI drivers and input signal filtering on the SCSI
receivers. Active negation causes the SCSI Request, Acknowledge,
Data, and Parity signals to be actively driven HIGH rather than passively
pulled up by terminators.
TolerANT receiver technology improves data integrity in unreliable
cabling environments where other devices would be subject to data
corruption. TolerANT receivers filter the SCSI bus signals to eliminate
unwanted transitions, without the long signal delay associated with
RC-type input filters. This improved driver and receiver technology helps
ensure correct clocking of data.
TolerANT technology increases noise immunity, balances duty cycles,
and improves SCSI transfer rates. In addition, TolerANT SCSI devices do
not cause glitches on the SCSI bus at power-up or power-down, which
protects other devices on the bus from data corruption. When used with
the LVDlink transceivers, TolerANT technology provides excellent signal
quality and data reliability in real world cabling environments.
1.7 Features
The LSI53C320
•
complies with the SCSI Parallel Interface 4 (SPI-4) Specifications
– complies with SCSI Enhanced Parallel Interface (EPI)
Specifications
– supports Double Transition (DT) clocking
– supports CRC in DT data phases
– supports Domain Validation technology
– supports Ultra320 SCSI Packetized Transfers
– provides SCSI signal and timing calibration
– is backward-compatible with previous revisions of the SCSI
specification