CS1-BRASS
CompactPCI Wide Ultra SCSI Hostadapter
40MByte/s Data Transfer Rate
Successfully established as the new
standard for modular industrial computers,
a wide range of
CompactPCI®
CPU boards
are available from several manufacturers.
However, not all of the mainboards are
equipped with an on-board SCSI interface.
This gap can be filled by the CS1-BRASS, a
universal,
CompactPCI®
based Wide Ultra
SCSI Hostadapter, suitable for controlling
of 8- and 16-Bit SCSI peripherals such as
harddisks, MO-drives, CD-ROMs, Streamer
Tapes, Scanners, Juke-Boxes etc. SCAM
(SCSI Configured AutoMatically) as well as
PCI plug&play technology care for easy
installation and smooth system integration of
the CS1-BRASS.
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The CS1-BRASS hostadapter is provided
with a single ended SCSI-3 interface,
offering a data transfer rate of 40MByte/s when
operated in the Wide and Ultra modes.
Compatibility is maintained to all previous
SCSI standards, e.g. asynchronous (SCSI-1)
or Fast SCSI. In a coloured environment
(simultaneous use of peripherals conforming
to different SCSI standards), the data rate in
effect is switched to its maximum for any
individual device.
The CS1-BRASS allows for connecting to 7
devices with 8-Bit (Narrow) SCSI interface
or 15 peripherals with 16-Bit (Wide)
connector. Internal and/or external
mounting of the devices is at the users
choice; the active termination of the CS1
follows any configuration automatically.
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CS1-BRASS Wide Ultra SCSI Hostadapter, Orientation of Connectors
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The jumperless board is built around the LSI Logic
(Symbios) SYM53C875 PCI-SCSI I/O
processor, a high performance, widely
accepted industry standard chip. Being also
compatible to the popular SYM8751SP
hostadapter board, the CS1-BRASS can be
used with all Symbios Logic software (e.g.
the Device Management System SDMS
4.x), and all existing SYM8751SP drivers
for operating systems as Windows9x/NT or
Linux are valid also for the CS1-BRASS.
For flexible cabling, the CS1 is provided
with three SCSI connectors for internal and
external use. Any combination of two of the
SCSI connectors can be used together at the
same time:
The 68-position SCSI-3 receptacle SCSI_A is
mounted to the front panel of the CS1-BRASS.
External SCSI devices with 16-Bit
Wide interface can be connected directly
here (most commonly by a round cable);
8-Bit (Narrow) SCSI peripherals need an
adapter (connector or cable) in order to
reduce from 68-positions to 50-positions.
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The SCSI-3 connector SCSI_B is provided
for internal wiring to 16-Bit Wide SCSI
devices, mounted within the
CompactPCI®
rack. This connector typically will be used
together with a fine-pitch microribbon flat
cable (0.635mm).
Internal 8-Bit SCSI devices can be directly
attached to the 50-way header connector
SCSI_C, by using a conventional flat cable
(1.27mm pitch).
Peripherals, attached to any of the three SCSI
connectors, are sensed by a logic circuitry. If
the logic detects the CS1-BRASS to be one end
of the SCSI bus, the local SCSI terminators are
activated. Because the terminators for D0..D7
and D8..D15 are switched individually, also
external Wide devices at SCSI A and internal
Narrow devices at SCSI C can be used
simultaneously. Using all three SCSI connectors
together (hub) cannot be allowed while the SCSI
topolgy is restricted to a bus structure.
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The CS1-BRASS contains a Flash Extended
BIOS, allowing operating system boot from a
SCSI drive. The Flash-EEPROM can be
updated at any time by means of a utility
program. The CS1-BRASS is additionally
provided with a serial EEPROM,
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acting as a
NVRAM, saving configuration parameters of
the board (e.g. for SCAM support).
As a help for installation or fault detection,
several LEDs show important board status
information:
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LED1 |
SCSI Bus Busy Signal (BSY)
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LED2
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Flash EEPROM programming (+12V switched on)
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LED3
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Serial EEPROM read or write cycle
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LED4
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SCSI line terminator LT1 activated (data bits D8-D15, parity DP1)
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LED5
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SCSI line terminator LT2 activated (data bits D0-D7, parity DP0, control signals)
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LED6 (FP left)
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SCSI bus TERMPOWER (+4,7V) by internal or external source
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LED6 (FP right)
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SYM53C875 I/O processor activity
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The CS1-BRASS sources the voltage for the on-board and
external SCSI terminators
(TERMPOWER), fused by a Polyswitch
(reversible fuse).
SCSI Bus data and control signal integrity will
be improved by the SCSI controller chip using
the Symbios Tolerant™ filtering technology,
thus minimizing the influence of a critical SCSI
cabling (poor cables, mixed cable types, noisy
environment).
It is not necessary to discuss the
advantages of SCSI here, such as superior data
throughput at minimal CPU load. With the
CS1-BRASS, your
CompactPCI®
system too can profit from Wide Ultra SCSI
performance. The CS1-BRASS is a high
reliability, industrial grade product,
available at moderate cost, and - last not
least - fast and smoothly to be installed.
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A toolset already mentioned, but worth to be
more intensively discussed is the LSI Logic (Symbios)
SCSI Device Management Software SDMS,
running
on the CC1-BRASS without any modification.
SDMS is a package of utilities and drivers,
including ASPI, RAID, or removeable media
support for popular disk operating systems. As
a resident part of the SDMS, basic routines are
contained within the on-board Flash Extended
BIOS. Like any other BIOS routine, this resident
software does not depend on an individual OS,
but allows standalone operation and diagnostics
instead, e.g. low level harddisk formatting or
SCSI bus configuration. In order to obtain
current information or download the latest
firmware release, the LSI Logic (Symbios) Internet site
http://www.lsi.com
should be visited.
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Technical Specifications |
Printed Circuit Board
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Dimensions
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3U Eurocard (100x160mm), front panel width 20.2mm (4HP),
mechanics constructed with respect to EMC requirements, ejector lever
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SCSI Bus
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Bus Type
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8/16-Bit, Single Ended, max. 7 devices (8-Bit),
15 devices (16-Bit)
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Performance
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Wide Ultra 40MByte/s (16-Bit),
Narrow Ultra 20MByte/s (8-Bit)
Wide Fast 20MByte/s (16-Bit),
Narrow Fast 10MByte/s (8-Bit)
Asynchronous 14MByte/s
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Connector External
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68-pos., high density receptacle (metal screen), screw lock 2-56 UNC (SCSI-3)
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1. Connector Internal
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68-pos. high density socket 90 (Wide)
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2. Connector Internal
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50-pos. header 2.54mm, 180 (Narrow)
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Total SCSI Cable Length
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SCSI-1 (asynchronous) 6m
Fast SCSI and Wide Fast SCSI 3m
Ultra SCSI and Wide Ultra SCSI 3m (4 devices),
1.5m (8 devices)
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Termination
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active, switched automatically
termination power with Polyswitch (reversible fuse 1.25A)
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Controller Chip
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I/O processor SYM53C875J
pre-fetches of 8 SCRIPTS™ dword instructions
minimize PCI bus load
load and store SCRIPTS™
instruction increases performance
includes 4kB internal RAM for SCRIPTS™ instruction storage
optimized block transfers at Ultra SCSI clock rates
536 Byte DMA FIFO
SCAM (SCSI Configured AutoMatically)
level 1 functionality
target disconnect/reconnect (interrupt)
Symbios TolerANT™ SCSI signal filtering
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CompactPCI®
Bus
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Connector J1
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PCI 2.1, 32-Bit, 33MHz (133MB/s)
PCI Extended Access Cycles
32-Bit DMA Bus Master (133MB/s)
zero wait state PCI transfers
bursts up to 128 dwords across PCI bus
3.3V or 5V interface
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Power Consumption
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Connector J1
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+5V ±5% 1.5A max. (including termination power)
+3.3V ±0.3V 130mA max. (when operating in a 3.3V VIO slot)
VIO (+5V or +3.3V) 0.1A max
+12V ±5% 50mA max. (when programming Flash EEPROM)
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Temperature
Humidity
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Commercial Grade Version
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operating temperature 0-70°C
humidity 5-90% non condensing
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subject to change without further notice
Ordering Information |
Alias
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Ordering Number
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Short Description
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BRASS
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CS1-1-BRASS
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3U CompactPCI Wide Ultra SCSI Hostadapter
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CR9-1-ADAPT
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Mechanical kit, expands 3U front panel to 6U
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