Operational Environment
A-7
A.2.2 The SCSI Interface
The SCSI interface conforms to ANSI X3T10.11/1142.
The SCSI interface operates as two 16-bit, SE or LVD channels, and
supports Fast, Ultra, and Ultra2 SCSI protocols. The interface is made
through connectors J2, J3, and J4 for Channel A and J5 for Channel B.
J2 is a 68-pin high density latching right angle connector for internal
SCSI connections to Channel A. J3 is a 50-pin high density right angle
connector that protrudes through the ISA/EISA bracket for external
connections to Channel A. Also on Channel A is connector J4, which is
a 50-pin narrow (ribbon) connector for internal connections. Channel A
has auto-sensing, active SE SCSI termination.
J5 is a 68-pin high density latching right angle connector for internal
SCSI connections to Channel B. Channel B has Active, SE or LVD SCSI
termination that is always enabled.
SCSI termination power is supplied by the board.
Tables
A.4
,
A.5
,
A.6
, and
A.7
show the signal assignments for J2, J3, J4
and J5 respectively (see
Figure 2.1
, in
Chapter 2
).
Summary of Contents for LSI21002
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Page 76: ...B 8 Glossary...
