88SM4140 datasheet, PDF - EEWORLD Datasheet

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88SM4140: Description1:4 port multiplier solution; File Size114KB，2 Pages; ManufacturerETC

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88SM4140 Overview

1:4 port multiplier solution

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Storage

Solutions

Serial ATA II

1:4 Port Multiplier Solution

88SM4140

PRODUCT OVERVIEW

The Marvell

88SM4140 port multiplier device offers the industryÕs first solution for port expansion. The device

enables one active host connection to communicate with up to 4 Serial ATA disk drives. The device uses MarvellÕs

production-proven Serial ATA PHY technology and supports both 1.5 Gbps and 3.0 Gbps speeds with adjustable

pre-emphasis and amplitude settings on all 5 ports (1 host, 4 device) for tuning high-speed, long-trace backplane

implementations. The device also provides one Storage Enclosure Management Bridge (SEMB) port for communication

with a Storage Enclosure Processor (SEP). Per the Serial ATA II specification, the 88SM4140 device supports

command-based and FIS-based switching supporting simultaneous queued operations to all attached devices.

The 88SM4140 product also supports a Marvell-proprietary mode called queued command based switching which

enables the performance advantages of FIS-based switching but with reduced complexity.

Host PHY

UART/SEMB

UART

Control

SEMB

Control

Port Arbiter

Serial ATA

Host

MUX

PLL

PM_CTRL

FIFO

REFCLK

Port 0 PHY

Serial ATA

Device 0

Port 1 PHY

Serial ATA

Device 1

Port 2 PHY

Serial ATA

Device 2

Port 3 PHY

Serial ATA

Device 3

Fig 1. Serial ATA II Port Multiplier (88SM4140) Block Diagram

FEATURES

1.5/3.0 Gbps PHY operation

FIS-based switching

Queued command-based switching (Marvell Proprietary)

1 SEMB port

Staggered HDD spin-up

SATA BIST over host and device links

Programmable pre-emphasis and amplitude per port

Spread Spectrum Clocking (SSC)

1.2V and 3.3V power

Compatible with Marvell 88SX60xx Serial ATA II host controllers

and 88SA8040 Parallel ATA to Serial ATA bridges

BENEFITS

Supports next-generation HDD designs

Superior performance by allowing the host to have outstanding

commands to multiple devices at any point in time

Allows performance advantages of FIS-based switching but with

reduced complexity

Allows connection to off-chip SEP for enclosure

Allows host-side control of HDD spin-up to manage power budget

during system power-up

Enable optimal per-port PHY tuning for Serial ATA backplane designs

Reduces EMI for enterprise storage and server applications

Interface flexibility

End-to-end system interoperability

Serial ATA II 1:4 Port Multiplier Solution

APPLICATIONS

The 88SM4140 1:4 Serial ATA II port multiplier, when combined with the CompanyÕs market-leading 88SX60xx Serial ATA II

4 or 8-port host controllers, will enable enterprise-class port expansion inside storage arrays, RAID subsystems and servers.

Further, the port multiplier is also ideal for next-generation home storage applications, enabling up to 1 Terabyte (1,000 GB)

of storage expansion for video, audio and high-resolution graphics or photos inside digital set top boxes, digital video recorders

(DVRs), or PCs and laptops. For example, 1 Terabyte of expanded storage could hold over 250,000 songs or over 1,000 full-

length feature films.

Processor

North Bridge

Memory

Server

External

Serial ATA

JBOD

I/O Hub

64-Bit PCI-X

Serial ATA

Host Controller

(88SX6081)

Serial ATA II

1:4

Port Multiplier

(88SM4140)

Fig 2. Serial ATA Port Multiplier (88SM4140) Applications Diagram

THE MARVELL ADVANTAGE:

The Marvell 88SM4140 Serial ATA II port multiplier comes with a complete set of hardware and software

development tools to assist engineers developing next generation storage networking solutions. MarvellÕs worldwide field applications

engineers collaborate closely with storage networking equipment vendors to develop and deliver innovative products to market. Marvell

utilizes recognized world-leading semiconductor foundry and packaging services to reliably deliver high-volume and low cost total

solutions.

For more information, visit our website at www.marvell.com.

Marvell Semiconductor, Inc.

700 First Avenue

Sunnyvale, CA 94089

Phone 408.222.2500

www.marvell.com

Moving Forward Faster, Alaska, Fastwriter, GalNet, PHYAdvantage, and Prestera are registered

trademarks of Marvell. Discovery, DSP Switcher, GalTis, Horizon, Libertas, Link Street, NetGX,

RADLAN, Raising The Technology Bar, The Technology Within, UniMAC, Virtual Cable Tester, and

Yukon are trademarks of Marvell. All other trademarks are the property of their respective owners.

88SM4140-001

02/04

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