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1.2.3 Board Characteristics
The board characteristics are
•PCI board dimensions Approximately 4.721 x 2.536 inches
•Universal 32-bit PCI card edge connector
•Standard bracket available
1.2.4SCSI Activity LED Interface
The J3 connector is a four-wire arrangement on the LSI20160 that represents the SCSI activity LED interface. Table 3.5 on page 3-8lists the signal name and pin numbers for this LED interface.
1.3 Ultra160 SCSI Benefits
Ultra160 SCSI is an extension of the SPI-3 draft standard that allows faster synchronous SCSI data transfer rates than Ultra2 SCSI. When enabled, Ultra160 SCSI performs 80 megatransfers per second resulting in approximately double the synchronous data transfer rates of Ultra2 SCSI. The LSI53C1000 performs 16-bit, Ultra160 SCSI synchronous data transfers as fast as 160 Mbytes/s. This advantage is most noticeable in heavily loaded systems or large block size applications such as video on-demand and image processing.
1.3.1 Double Transition (DT) Clocking
The Ultra160 data transfer speed is accomplished using DT clocking. DT clocking refers to transferring data on both rising and falling edges of the request and acknowledge signals. Double-edge clocking doubles data transfer speeds without increasing the clock rate.
1-4 | Describing the LSI20160 |
Copyright © 2001 by LSI Logic Corporation. All rights reserved.