參數(shù)資料
型號： SYM22902
英文描述： SYM22902 PCI to Ultra2 SCSI Dual Channel low profile PCI host adapter user＇s guide v1.0
中文描述： SYM22902 PCI到Ultra2的SCSI雙通道高PCI主機(jī)適配器用戶指南1.0版
文件頁數(shù)： 14/88頁
文件大?。?/td> 1211K
代理商： SYM22902
1-4
Using the SYM22902 Low Profile PCI Host Adapter
1.2.4 SCSI Activity LED Interface
The SYM22902 LED interface is a four-wire arrangement that allows the
user to connect an LED harness to the board. The GPIO0_FETCH line
for each channel is driven low to complete the circuit when a harness
with an LED is attached. The connector on the SYM22902 is J3 for both
channels. See
Table A.5
for the signal name and pin numbers for this
LED interface.
1.2.5 Wide Ultra2 SCSI
The SYM22902 fully supports Wide Ultra2 SCSI. This interface is an
extension of the SCSI-3 family of standards that expands the bandwidth
of the SCSI bus to allow faster synchronous data transfers, up to 80
Mbytes/s. Wide Ultra2 SCSI provides a doubling of the data rate over the
Ultra2 SCSI interface, while it increases cable lengths and allows a larger
number of devices on the cable than Ultra2 SCSI interfaces.
Special SCSI cables are specified for operation with Wide Ultra and
Ultra2 SCSI devices. You must consider the total number of devices and
the length of your SCSI bus when setting up your system. See
Chapter 2,
“Installing the SYM22902 Host Adapter”
for a more detailed explanation
of SCSI bus connections.
The cable included in the SYM22902 host adapter kit is matched for
fast/Ultra/Ultra2 SE or LVD operation. This cable also has built-in LVD
termination since most Ultra2 hard disk drives are not made with on-
board LVD termination.
Table 1.1
provides an overview of standard SCSI
cable specifications.
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