参数资料
型号: SYM53C180I2
厂商: LSI CORP
元件分类: 总线控制器
英文描述: SCSI BUS CONTROLLER, PBGA192
封装: 23 X 23 MM, 1.27 MM PITCH, PLASTIC, BGA-192
文件页数: 6/78页
文件大小: 1073K
代理商: SYM53C180I2
1-4
Introduction
In the second example, Figure 1.3, the SYM53C180 is cascaded to
achieve four distinct SCSI segments. Segments A and D can be treated
as point-to-point segments. Segments B and C are treated as load
segments with at least 8-inch spacing between every node.
Figure 1.3
SYM53C180 SCSI Bus Device
Table 1.2
SCSI Bus Distance Requirements
Segment
Mode
Length Limit
A
LVD (Ultra3)
25 meters
SE (Ultra)
3 meters1
B
LVD (Ultra3)
12 meters
SE (Ultra)
1.5 meters
C
LVD (Ultra3)
12 meters
SE (Ultra)
1.5 meters
1. The length may be more, possibly 6 meters, as no devices are
attached to it.
Table 1.3
Transmission Mode Distance Requirements
Segment
Mode
Length Limit
A, D
LVD (Ultra3)
25 meters
SE (Ultra)
1.5 meters
B, C
LVD (Ultra3)
12 meters
SE (Ultra)
1.5 meters
Segment A
Segment B
Segment C
Primary
Secondary
Shared Disk
SCSI Bus
Expander
SCSI Bus
Expander
Server
SCSI Bus
Expander
Segment D
Subsystem
Shared Disk
Subsystem
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