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1-2
Introduction
1.2 SCSI Mode
The SYM53C040 uses the SCSI bus to report system information such
as enclosure temperature, power supply status, and disk slot status to
the host SCSI controller. It also responds to host SCSI controller
commands by generating control outputs to enable and disable disk
slots, drive indicator displays, or perform other system tasks. The
SYM53C040 supports Low Voltage Differential (LVD) access as well as
Single-Ended (SE) SCSI access without the need for external
transceivers.
shows a typical SCSI enclosure implementation
with the SYM53C040.
Figure 1.1
SCSI/SAF-TE Enclosure Implementation
SAF-TE
SAF-TE
SCSI or PCI RAID
Host Adapter
LVD SCSI
LVD
Drive
Drive
Drive
Drive
Drive
Primary
Power 1
Primary
Power N
Fan 1
Fan N
Temp
Sensor
Door
Lock
SE
Drive
Drive
Drive
Drive
Drive
SE
SYM53C141
Isolation and Conversion
SYM53C040
Enclosures Services
SCSI Drive Enclosure
Summary of Contents for Symbios SYM53C040
Page 12: ...xii Preface...
Page 90: ...4 18 SCSI and DMA Registers...
Page 98: ...5 8 SFF 8067 Registers...
Page 110: ...6 12 Two Wire Serial Registers...
Page 126: ...7 16 Miscellaneous Registers...
Page 160: ...8 34 System Registers...
Page 184: ...9 24 Electrical Characteristics...
Page 194: ...A 10 Register Summary...
Page 214: ......