Avago Technologies LSI53C140 - Manual (Page 74)

C-6 Glossary
Ver. 2.1 Copyright © 1998–2001 by LSI Logic Corporation. All rights reserved.
Single-Ended
Configuration An electrical signal configuration that uses a single line for each signal,
referenced to a ground path common to the other signal lines. The
advantage of a single-ended configuration is that it uses half the pins,
chips, and board area that differential/low-voltage differential
configurations require. The main disadvantage of single-ended
configurations is that they are vulnerable to common mode noise. Also,
cable lengths are limited.
Synchronous
Transmission Transmission in which the sending and receiving devices operate
continuously at the same frequency and are held in a desired phase
relationship by correction devices. For buses, synchronous transmission
is a timing protocol that uses a master clock and has a clock period.
Target A SCSI device that performs an operation requested by an initiator.
Termination The electrical connection at each end of the SCSI bus, composed of a set
of resistors.
µ
s Microsecond. One millionth of a second.
WDTR Wide Data Transfer Request messages are used to negotiate a wide data
transfer agreement between two SCSI devices. A WDTR agreement
applies to all logical units of the two SCSI devices that negotiated the
agreement.