LSI53C895A
ULTRA2 SCSI CONTROLLER
BENEFITS
• Reduces CPU utilization by
handling data phase mismatches
on the SCSI bus
• Supports third-party RAID
controllers via SCSI Interrupt
Steering Logic (SISL) alternate
interrupt routing
• Minimizes risk for Microsoft
®
PCI-ULTRA2 SCSI CONTROLLER OVERVIEW
The LSI53C895A PCI-Ultra2 SCSI Controller is designed to meet the
demand for higher performance and integration in the server and workstation
market. A drop-in replacement for the industry-standard LSI53C895 PCI-
Ultra2 SCSI Controller, the LSI53C895A adds many features and benefits,
including increased performance.
system certification
• Enhances migration from
LSI53C895
H
o
Br st
id PC
ge I
32-bit, 33 MHz Primary PCI Bus
LSI53C895A
PCI-Ultra2 SCSI
Flash
(Up to 1 MB)
NVRAM
SCSI
Ultra2 SCSI Bus
Figure 1. SCSI on the motherboard
APPLICATIONS
•
Servers
– Internet/Intranet network, video, e-mail, printing, database
management, etc.
•
Workstations
– CAD/CAM, industrial simulation, etc.
•
Host attach for RAID and JBOD mass storage subsystems
– Anywhere high
speed data access is required
LSI53C895A Ultra2 SCSI Controller
KEY FEATURES
• Pin compatible replacement for
LSI53C895
• Op code (software)
compatible
• 32-bit, 33 MHz PCI interface
• 64-bit addressing DAC
supported
• Compliant with PCI 2.2, PCI
Hot Plug, PCI Power
Management 1.1 and PC99
• Wide Ultra2 SCSI supports up
to 80 MBps transfer rate
• Integrated LVDIink
™
universal transceivers
• Wide range of signaling
environments
• Low Voltage Differential (LVD)
• High Voltage Differential (HVD)
• Single-ended (SE)
• 8 KB internal SCRIPTS
™
RAM
• 944-byte DMA FIFO for
efficient PCI bursts
• 40 MHz SCSI clock
• IEEE 1149.1 JTAG boundary scan
• SCSI Interrupt Steering Logic
(SISL) provides alternate interrupt
routing for RAID applications
HARDWARE/SOFTWARE FEATURES
Compatibility with LSI53C895 Controller
The LSI53C895A is pin compatible with the LSI53C895 PCI-Ultra2 SCSI
controller, which is the proven, industry standard in the Ultra2 SCSI market
today. With minor changes to pull-up resistor options, the LSI53C895A can
be dropped into an existing LSI53C895 board, providing enhanced features
while minimizing risk.
PCI Interface
The host PCI interface complies with PCI Local Bus Specification Revision
2.1, and implements a 32-bit/33 MHz PCI bus. Additionally, support for
64-bit addressing is provided through DAC.
The LSI53C895A complies with PCI Power Management Interface
Specification, Revision 1.1 and PC99, supporting power states DO, DI,
D2, D3hot, and D3cold, power management capabilities registers in PCI
configuration space, and programmable values for PCI Subsystem Vendor ID
and Subsystem ID. Extended access cycles (Memory Read Line, Memory
Read Multiple, and Memory Write and Invalidate) are also supported.
SCSI Processor
The LSI53C895A SCSI controller supports wide Ultra2 SCSI synchronous
transfer rates up to 80 MBps on a LVD SCSI bus. Integrated LVDIink transceivers
support both LVD and single-ended signals with no external transceivers
required, alternatively, HVD signaling is supported with external transceivers.
Fast SCSI, Ultra SCSI, and Ultra2 SCSI are all supported by the LSI53C895A,
providing maximum flexibility.
An on-chip SCSI clock quadrupler allows the chip to achieve Ultra2
SCSI transfer rates with an input frequency of 40 MHz.
8 KB of internal RAM for SCRIPTS instruction storage allow accesses to
remain internal, reducing the time spent on the PCI bus. A 944-byte DMA
FIFO allows the device to efficiently burst up to 512 bytes across the PCI bus.
SCSI bus phase mismatches are handled in SCRIPTS, reducing CPU utilization.
2
MEMORY INTERFACES
The LSI53C895A supports up to I MB of external expansion ROM through
a parallel interface, for add-in card designs. For ease of software development
and field upgrades of the ROM, the interface supports local programming of
FLASH memory. A serial 2-wire interface provides a connection to an external
serial EEPROM for storing Subsystem Vendor ID and Subsystem ID.
K E Y F E AT U R E S
(Continued)
• Supports LSI Logic’s
Nextreme
™
RAID
• Flash and local memory
interface
• Packaged in a 208 PQFP
or 272 PBGA
LSI53C895A
208 PQFP, 272 PBGA
CLK
RST/
REQ/
GNT/
AD[31:0]
C_BE[7:0]/
IDSEL
FRAME/
IRDY/
TRDY/
DEVSEL/
STOP/
PERR/
SERR/
PAR
IRQ/
ALT_IRQ/
INTB/
ALT_INTA/
SCLK
RBIAS
SD[15:0]/
SDP[1:0]/
DIFFSENS
SC_D/
SI_O/
SMSG/
SREQ/
SREQ2/
SACK/
SACK2/
SBSY/
SATN/
SRST/
SSEL/
• Supported in Storage Device
Management System (SDMS)
release 4.6
• Full operating system support:
- Windows NT 4.0,
95/98 and 2000
- Linux
™
- Solaris
™
®
®
32-bit, 33 MHz PCI
SCSI
A_GPIO0_FETCH/
A_GPIO1_MASTER/
A_GPIO2
A_GPIO3
A_GPIO4
A_GPIO5
A_GPIO6
SCSI Function GPIO
A_GPIO7
A_GPIO8
TEST_RSTN
TEST_HSC
MOE/_TESTOUT
TCK
TMS
Test Interface
TDI
TDO
- UnixWare
™
- Novell NetWare
- OS/2
• DMI 2.0 Server Management
support for Windows NT,
NetWare and UnixWare
®
®
MWE/
MCE/
MAC/_TESTOUT
MOE/
MAS0/
MAS1/
Memory Interface
MAD7-0
Figure 2. LSI53C895A functional signal grouping
3
LSI53C895A Ultra2 SCSI Controller
SOFTWARE
SDMS software was designed using a modular approach for quick development,
validation and support for new OS versions as well as the LSI53C895A. To
round out the SDMS solution, LSI Logic also provides installation and configuration
utilities, user documentation for each OS, plus timely and knowledgeable
technical support. For performance, SDMS software takes advantage of the
I/O processing capabilities of the LSI53C895A to support target disconnect/
reselect, synchronous and wide SCSI operation and multiple host adapters.
Under Windows NT, Solaris and NetWare, SDMS software supports one
processor interrupt per I/O.
Server Management support is DMI 2.0-based for Windows NT, NetWare
and UnixWare, with management application support through a snap-in
Java
™
based browser.
Host PCI Bus (32-bit, 33 MHz)
For more information please visit
the
LSI Logic web site at:
http://storageio.lsilogic.com
LSI Logic Corporation
North American Headquarters
Milpitas, CA
Tel: 866 574 5741
LSI Logic Europe Ltd.
European Headquarters
United Kingdom
Tel: 44 1344 426544
Fax: 44 1344 481039
LSI Logic KK Headquarters
Tokyo, Japan
Tel: 81 3 5463 7165
Fax 81 3 5463 7820
ISO 9000 Certified
PCI Master and Slave Control Block
8 Dword SCRIPTS
Prefetch Buffer
8 KB SCRIPTS
RAM
ROM/Flash Memory Control
Ultra2 SCSI
Controller Block
SCSI SCRIPTS
Processor
Serial EEPROM Controller
and Auto-Configuration
LSI Logic logo design and TolerANT are registered
trademarks, and LVDlink, Nextreme, SCRIPTS,
SDMS, and SureLINK are trademarks of LSI Logic
Corporation. All other brand and product names
may be trademarks of their respective companies.
LSI Logic Corporation reserves the right to make
changes to any products and services herein at
any time without notice. LSI Logic does not
assume any responsibility or liability arising out of
the application or use of any product or service
described herein, except as expressly agreed to
in writing by LSI Logic; nor does the purchase,
lease, or use of a product or service from LSI
Logic convey a license under any patent rights,
copyrights, trademark rights, or any other of the
intellectual property rights of LSI Logic or of third
parties.
Copyright ©2001 by LSI Logic Corporation.
All rights reserved.
944-byte
DMA FIFO
SCSI FIFO and SCSI Control Block
Frequency
Synthesizer
Universal LVD Drivers & Receivers
Opening
registers
Local
Memory
Bus
40 MHz
Oscillator
Wide Ultra2 SCSI Bus
2-wire Serial
EEPROM Bus
ROM/Flash
Memory Bus
Figure 3. LSI53C895A functional block diagram
Order No. S20011
4/01-1M – Printed in USA
4
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