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PDF SYM53C140 Data sheet ( Hoja de datos )
| Número de pieza | SYM53C140 | |
| Descripción | Bus Controller | |
| Fabricantes | LSI Logic | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SYM53C140 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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t4June 1999
eeVersion 1.0
ww.DataSh®
wOrder Number S14006
www.DataSheet4U.com
1 page  
Contents
Chapter 1
Chapter 2
Chapter 3
Introduction
1.1 General Description
1.1.1 Applications
1.1.2 Features
1.1.3 Specifications
1.2 Benefits of LVDlink
1-1
1-2
1-4
1-5
1-6
Functional Descriptions
2.1 Interface Signal Descriptions
2.1.1 SCSI A Side and B Side Control Blocks
2.1.2 Retiming Logic
2.1.3 State Machine Control
2.1.4 Precision Delay Control
2.1.5 DIFFSENS Receiver
2.1.6 Dynamic Transmission Mode Changes
2.1.7 SCSI Signal Descriptions
2.1.8 SCSI Termination
2-1
2-2
2-4
2-4
2-4
2-5
2-5
2-6
2-13
Specifications
3.1 Signal Descriptions
3.2 Electrical Characteristics
3.2.1 DC Characteristics
3.2.2 TolerANT Technology Electrical Characteristics
3.2.3 AC Characteristics
3.2.4 SCSI Interface Timing
3.3 Mechanical Drawings
3.3.1 SYM53C140 160-pin PQFP Mechanical
Drawing
3-1
3-7
3-7
3-11
3-15
3-15
3-17
3-18
Contents
v
5 Page 
Figure 1.2 SYM53C140 Server Clustering
Segment A
Primary Server
SCSI Bus
Expander
Segment B
SCSI Bus
Expander
Secondary Server
Segment C
Shared Disk Subsystem
Figure 1.2 demonstrates how SCSI bus expanders are used to couple
bus segments together without any impact of the SCSI protocol or
software. Configurations that use the SYM53C140 SCSI Bus Expander
in the Ultra2 mode (LVD to LVD) allow the system designer to take
advantage of the inherent cable distance, device connectivity, data
reliability, and increased transfer rate benefits of LVD signaling with
Ultra2 SCSI peripherals.
In Figure 1.2 example, the SYM53C140 is configured as a three port
expander board. This configuration allows segments A and B to be
treated as a point-to-point segment. Segment C is treated as a load
segment with at least 8 inches between every node. Table 1.2 shows the
various distance requirements for each SCSI bus mode.
Table 1.2 SCSI Bus Distance Requirements
Segment
A, B
Segment C
Mode
LVD (Ultra2)
SE (Ultra)
HVD (Ultra)
LVD (Ultra2)
SE (Ultra)
HVD (Ultra)
Length Limit
25 meters
20 meters
25 meters
12 meters
1.5 meters
25 meters
General Description
1-3
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet SYM53C140.PDF ] | |
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