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LSI53C875E SCSI CONTROLLER
The Communications CompanyTM
P C I - U LT R A S C S I C O N T R O L L E R
BENEFITS
* Pin-for-pin replacement for LSI53C825 and LSI53C825AE devices * Minimal software and hardware modifications required for Ultra SCSI support * Compact 160-pin PQFP reduces board space requirements (LSI53C875E, LSI53C875JE)
OVERVIEW
The LSI53C875E controller supports Ultra SCSI transfers, enabling the chip to transfer SCSI data at up to 40 MBps across a 16-bit bus. Ultra SCSI is an extension of the SCSI-3 standard that expands the bandwidth of the SCSI bus and allows faster synchronous SCSI transfer rates-approximately double the synchronous transfer rates of fast SCSI-2. The LSI53C875E provides full SCSI-2 capabilities and reduces the requirements for system BIOS support with a local memory interface. It also features LSI Logic TolerANT SCSI driver and receiver technology, for reliable operation in all cabling environments. It is designed to connect gluelessly to the Peripheral Component Interconnect (PCI) bus, and supports PCI extended access cycles, enabling the system architect to take advantage of PCI's performance potential.
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* Alternative 169 BGA package (LSI53C875JBE) * Direct PCI to SCSI connection * Fully supported by SDMS software for complete PC-based operating system support
FEATURES
* Performs wide high-speed SCSI bus transfers in single-ended and differential mode up to: * 40 MBps synchronous (Ultra) * 14 MBps asynchronous * SCRIPTSTM Instruction Prefetch * 536-byte buffer allows burst length of up to 128 transfers * Load and store instruction * 4 KB static RAM for SCRIPTS instruction storage * 32 additional scratchpad registers for user-defined functions
The LSI53C875E and SDMSTM software provide a total Ultra SCSI solution in PC and workstation environments. LSI Logic's SDMS software package supports the entire LSI53C8XX family of PCI-to-SCSI controllers plus a wide range of SCSI peripheral devices. Included in the performance-enhancing features on the LSI53C875E is a 4 KB static RAM for SCRIPTS (the LSI Logic developed SCSI programming language) instruction storage, which allows tailored SCSI sequences to be executed locally. A 536-byte DMA FIFO increases system performance by allowing burst lengths of up to 128 transfers. Other features include: * SCRIPTS instruction prefetch which permits fetching four or eight double words of instructions or instruction operands. * Support for PCI extended access cycles: Memory Read Multiple, Memory Read Line, and Memory Write and Invalidate.
LSI53C875E SCSI Controller
* Selectable IRQ disable, allowing system designers to customize their system interface. * SCSI Selected as ID register, improving SCRIPTS coding and system tracking. * Load and Store instruction allows the programmer an efficient instruction option to load data directly to/from memory and from/to an internal register, reducing the number of l/O instructions to implement a SCRIPTS task.
FLEXIBILITY FEATURES
* Supports single-ended and differential modes * Selectable IRQ disable * SCSI Selected as ID register * Support for both 3.3 volt and 5 volt PCI interfaces * High-level programming interface (SCSI SCRIPTS) * Allows tailored SCSI sequences to be executed from main memory * Accommodates changes in the logical I/O interface definition * Low-level access to all registers and all SCSI bus signals
COMPATIBILITY FEATURES
* Compiler-compatible with existing LSI53C7XX and LSI53C8XX SCRIPTS * Full complement of LSI Logic SCSI SCRIPTS development tools available * BIOS and driver support for hard disk, tape, CD-ROM, and removable media peripherals for all of the major operating systems, including: * Windows NT 4.0 * Windows 95/98 * DOS * Linux * NetWare * SCO UnixWareTM * OS/2 Warp * Solaris
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RELATED LSI53C875E PRODUCTS
* LSI53C875JE -- the LSI53C875E with JTAG availability and a 160-pin PQFP package LSI53C875JBE -- the LSI53C875E with a 169 BGA package LSI8751SPE host adapter LSI8751D host adapter
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SCSI Connection
SCSI Term Connection
Vdd
Vss SCSI Bus
PCI Bus
LSI53C875E
SCLK Peripheral
40 MHz Oscillator
CPU Baseboard CPU Box
Figure 1: LSI53C875E system diagram
LSI53C875E SCSI Controller
For more information please visit the LSI Logic web site at:
http://storageio.lsilogic.com
LSI Logic Corporation
North American Headquarters Milpitas, CA Tel: 800 574 4286
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
LSI Logic logo design and TolerANT are registered trademarks, and SCRIPTS and SDMS 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 (c)2001 by LSI Logic Corporation. All right reserved.
Order No. S20027 2/01-500 - Printed in USA

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