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产品型号GD82559C的概述

芯片GD82559C的概述 GD82559C是一款由古河电气（GIGABYTE）研发的网络控制器芯片，广泛应用于以太网连接。它在多种计算设备中扮演着极为重要的角色，旨在提供高效、可靠的网络连接。GD82559C支持连接速度高达100Mbps，成为了许多嵌入式应用和计算机网络设备的首选解决方案。该芯片的设计目的是满足多样化的网络需求，尤其是在高速数据传输和低延迟的场合。GD82559C基于先进的半导体技术，结合高效的网络协议处理能力，确保在不同的应用场景下都能达到最佳性能。此芯片不仅支持传统的以太网协议，还具备对现代网络技术和协议的支持，展现出其广泛的适用性。芯片GD82559C的详细参数 GD82559C的主要参数如下： - 接口类型: 以太网接口 - 最大数据传输速率: 100Mbps - 支持协议: 802.3、802.3u、802.1Q等 - 工作电压: 3.3V - 功耗:...

产品型号GD82559C的Datasheet PDF文件预览

Intel-Based Electronic

Classroom Student Computing

Station Based on the Intel^®

Celeron™ Processor and Intel^®

810 Chipset

Reference Configuration

August 2000

Order Number: 273292-002

Information in this document is provided in connection with Intel products. No license, express or implied, by estoppel or otherwise, to any intellectual

property rights is granted by this document. Except as provided in Intel's Terms and Conditions of Sale for such products, Intel assumes no liability

whatsoever, and Intel disclaims any express or implied warranty, relating to sale and/or use of Intel products including liability or warranties relating to

fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Intel products are not

intended for use in medical, life saving, or life sustaining applications.

Intel may make changes to specifications and product descriptions at any time, without notice.

Designers must not rely on the absence or characteristics of any features or instructions marked "reserved" or "undefined." Intel reserves these for

future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to them.

The Intel^®Celeron^™and Pentium^®II processors, 810 Chipset, and 82559 ethernet controller may contain design defects or errors known as errata

which may cause the product to deviate from published specifications. Current characterized errata are available on request.

Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order.

Copies of documents which have an ordering number and are referenced in this document, or other Intel literature may be obtained by calling

1-800-548-4725 or by visiting Intel's website at http://www.intel.com.

*Other brands and names are the property of their respective owners.

Application Note

Intel-Based Electronic Classroom Student Computing Station

Contents

1.0

Introduction ......................................................................................................................5

1.1

1.2

1.3

Purpose .................................................................................................................5

Terminology...........................................................................................................5

Revision History ....................................................................................................5

2.0

3.0

Intel-Based Electronic Classroom Environment Overview..........................................6

Intel-Based Electronic Classroom Setup and Operating Environment.......................7

3.1

Intel-Based Electronic Classroom Configuration...................................................8

3.1.1 Network Environment ...............................................................................8

3.1.2 Teacher Station Management System .....................................................9

3.1.3 Multimedia Teaching Software .................................................................9

3.1.4 Application Software...............................................................................10

3.1.5 Remote Booting Intel-Based Electronic Classroom Student

Computing Stations from Server ............................................................10

4.0

5.0

Recommended Motherboard Configuration for Intel-Based

Electronic Classroom Student Computing Stations...................................................11

Design Consideration of Intel-Based Electronic Classroom

Student Computing Station Hardware .........................................................................13

5.1

Intel Celeron™ Processor .................................................................................13

5.1.1 Design Notes for the Intel Celeron™ Processor ..................................13

5.2

Intel 810 Chipset ...............................................................................................14

5.2.1 The Intel 82810 Graphics Memory Controller Hub (GMCH0) ..............15

5.2.1.1 Design Notes for the Intel 82810 GMCH0...............................15

5.2.2 The Intel 82801 I/O Controller Hub (ICH).............................................16

5.2.2.1 Design Notes for the Intel 82801 ICH......................................16

5.3

5.4

IDE Connectors...................................................................................................17

AC’97 2.1 Compliant Components......................................................................17

5.4.1 Design Notes for AC’97 Devices ............................................................18

Audio/Modem Riser Card (AMR).........................................................................18

5.5.1 Design Notes for the Audio/Modem Riser Card .....................................18

PCI ......................................................................................................................19

5.5

5.6

5.7

Network Controller — Intel 82559 Fast Ethernet Controller..............................19

5.7.1 Design Note for the Intel 82559 Fast Ethernet Controller ....................19

5.7.2 Wired for Management...........................................................................21

5.7.2.1 Instrumentation..........................................................................21

5.7.2.2 Remote Service Boot ................................................................22

5.7.2.3 Remote Wake-Up......................................................................22

5.7.2.4 Power Management ..................................................................22

Low Pin Count (LPC) Interface............................................................................22

5.8

6.0

Conclusion......................................................................................................................23

References......................................................................................................................25

Intel-Based Electronic Classroom Schematics...........................................................27

Application Note

Intel-Based Electronic Classroom Student Computing Station

Figures

Typical Intel-Based Electronic Classroom Setup .................................................. 7

Building Block of the Intel-Based Electronic Classroom Student

Computing Station Motherboard .........................................................................12

Topology for Single Processor Designs with Single End Termination (SET)......13

Placement of Termination Resistor .....................................................................20

Trace Geometry ..................................................................................................20

Cover Sheet Schematic ......................................................................................28

Block Diagram.....................................................................................................29

370-Pin Socket (Part 1).......................................................................................30

370-Pin Socket (Part 2).......................................................................................31

GTL Terminal Schematic ....................................................................................32

Clock Synthesizer Schematic..............................................................................33

82810, Part 1: Host Interface Schematic ............................................................34

82810, Part 2: System Memory and Hub Interface Schematic ...........................35

82810, Part 3: Graphics Schematic ....................................................................36

System Memory Schematic ................................................................................37

82810AA, Part 1 Schematic ................................................................................38

82810AA, Part 2 Schematic ................................................................................39

Firmware Hub (FWH) Schematic ........................................................................40

Super I/O Schematic ...........................................................................................41

PCI Connector Schematic...................................................................................42

ATA/33 IDE Connectors Schematic ....................................................................43

USB Connectors Schematic................................................................................44

Parallel Port Header Schematic ..........................................................................45

Serial Port/Com Headers Schematic ..................................................................46

Keyboard/Mouse Ports, Floppy Disk Header, Game Post Header Schematic ...47

Video Connectors Schematic..............................................................................48

Audio Riser Schematic........................................................................................49

LAN Schematic ...................................................................................................50

LAN Schematic ...................................................................................................51

Voltage Regulators..............................................................................................52

Processor Voltage Regulator Schematic ............................................................53

System Schematic ..............................................................................................54

System: Power Connector and Reset Control Schematic...................................55

Pull-Up Resistors and Unused Gates Schematic................................................56

730-Pin Socket Decoupling Schematic ...............................................................57

DRAM, Chipset and Bulk Power Decoupling Schematic ....................................58

Revision History Schematic ................................................................................59

Tables

Intel-Based Electronic Classroom Hardware Descriptions and

Recommended Configuration ............................................................................... 8

AC’97 Configuration Combinations .....................................................................17

Application Note

Intel-Based Electronic Classroom Student Computing Station

1.0

Introduction

1.1

Purpose

This application note describes how Intel architecture processors, chipsets, and other components

can be used in designs for Intel-based electronic classroom student computing stations. An

Intel-based electronic classroom is an educational setting in which a network of computers is used

as a primary teaching, learning, and assessment tool. A typical Intel-based electronic classroom

contains an instructor’s system that broadcasts application software to, and often receives data

from, student computing stations. The student computing stations can be configured and

administered at the server level.

Intel architecture components are well-suited for Intel-based electronic classroom systems. Using

PC-based building blocks in these designs provides flexibility, upgradability, ease of

administration, and high performance for graphic-intensive and internet applications. In addition,

Intel architecture processors are compatible with a wide variety of operating system and

off-the-shelf application software. This application note describes a typical Intel-based electronic

classroom network and provides a reference design for Intel architecture-based electronic

classroom student computing stations.

Schematics for the reference design are provided in Appendix B of this document.

1.2

Terminology

The following terms are used in this document.

Term

Definition

Intel-Based

Electronic

Classroom

An electronic teaching and learning environment that uses dedicated, connected student

computing stations to implement a specific educational curriculum

Remote boot

TCO

A client operating system boot up from a server in a network environment

Total cost of ownership

ISV

Independent software vendor

WfM

Intel’s Wired for Management initiative

1.3

Revision History

Revision

Date

Notes

001

October 15, 1999

Initial version.

Application Note

Intel-Based Electronic Classroom Student Computing Station

2.0

Intel-Based Electronic Classroom Environment

Overview

An Intel-based electronic classroom is a teaching and learning environment that uses a server-client

system in the classroom to implement the curriculum. Teaching and learning is done using a

teacher station, student computing stations, and specific educational software applications and

content. With this modern educational technology, educators can deliver intuitive online courses,

training, demonstrations, and examinations. They can also incorporate access to the Internet and

intranet to enrich the educational experience.

An Intel-based electronic classroom LAN environment can consist of up to 60 student computing

stations, a teacher station, and a network server. In an Intel-based electronic classroom, every

student computing station is administered centrally. These student computing stations have high

reliability and security, and low maintenance costs. The student computing stations have a subset

of a PC feature set: they typically have a different motherboard configuration (described in

Section 4.0) and are configured without a CD-ROM drive or hard disk. This solution provides a

greater access to the necessary technology while simplifying maintenance and reducing the total

cost of ownership.

In schools, PCs can be used in teacher offices as productivity tools for administration and

development of teaching materials. These materials may then be used in Intel-based electronic

classrooms to teach subjects such as computer skills, languages, sciences, and mathematics. The

teacher uses the teacher station in the Intel-based electronic classroom to guide students through

the lesson, while each student follows the lesson on his/her own student computing station. The

students can also use their student computing stations independently to practice lesson materials

and learn other application software.

Desirable features of Intel-based electronic classroom student computing stations include the

following:

• Ease of management and maintenance

Primary and secondary schools typically do not have a full time Information Technology (IT)

staff to manage the Intel-based electronic classroom. Most IT administration is done by

teachers and student volunteers. Hence, the student computing stations used in the Intel-based

electronic classroom must be easy to manage.

Intel-based electronic classroom student computing stations can be configured without

CD-ROM and floppy drives. This further simplifies the management of these student

computing stations by preventing students from erasing files or corrupting the operating

system and applications.

• Low total cost of ownership (TCO)

Schools have limited budgets for setting up Intel-based electronic classrooms. Therefore, a key

consideration is affordability in terms of initial capital and ongoing maintenance costs,

including the costs of off-the-shelf educational applications and teaching content.

• Software availability and compatibility

Establishing a productive Intel-based electronic classroom depends on the availability of

system-compatible, off-the-shelf applications and teaching materials. It is important that

schools have tools to develop customized content to meet the particular needs of their students.

• Product life cycle support

Schools use Intel-based electronic classroom student computing stations for several years

before considering an upgrade. Therefore, replacement parts should be available for this

duration.

Application Note

Intel-Based Electronic Classroom Student Computing Station

3.0

Intel-Based Electronic Classroom Setup and

Operating Environment

A typical Intel-based electronic classroom setup is depicted in Figure 1.

Figure 1.

Typical Intel-Based Electronic Classroom Setup

Internet

Home

School Network

15 - 60 Student

Computing Stations

Server

Teacher Station

Intel-Based Electronic Classroom

A7490-02

The student and teacher stations are linked together in a LAN environment via a network hub or

switch device. The LAN network enables the remote boot for diskless student computing stations

and file sharing among all the student computing stations. The broadcasting capability is

implemented through software using the existing LAN infrastructure. This solution reduces overall

system cost, simplifies wiring and upgrade requirements, and enables the use of higher

performance processors.

The components of a typical Intel-based electronic classroom and their recommended

configuration are described in Table 1.

Application Note

Intel-Based Electronic Classroom Student Computing Station

Table 1.

Intel-Based Electronic Classroom Hardware Descriptions and Recommended

Configuration

Quantity

Item

Teacher Station

Recommended Configuration

(units)

Intel^®Pentium^®III processor, 64 -128 Mbyte SDRAM, Intel^®440BX AGPset, Hard-disk,

Intel^®Network Card, Video Capture Card

Student Computing

Station

Intel^®Celeron™ processor 433 MHz or better (in 370-pin PPGA) and Intel^®810 chipset,

32 Mbyte SDRAM, Intel Network Card integrated on board, Hard-disk (optional)

Pentium III processor, 128 Mbyte SDRAM, Intel^®L440GX motherboard, SCSI Hard-disk,

Intel Network Card

15 - 60

Server

Switch

Router

1-3

Intel Express 510T, 24 10/100Mbit Switching Port

Intel Express 9500 Router for Internet connection

Multimedia teaching

Software

From ISVs. Based on TCP/IP or IPX network protocol. Intel^®LANSchool software site is a

basic reference: http://www.intel.com/network/products/lanschool.htm

3.1

Intel-Based Electronic Classroom Configuration

The configuration of the Intel-based electronic classroom depends on the size of the classroom, the

network design, and the use of the multimedia broadcasting software. The following describes an

example configuration that consists of five main parts:

• Network environment

• Teacher Station management system

• Multimedia broadcasting software

• Application and education software

• Intel-based electronic classroom student computing stations that remote boot from server

The following sections describe each component of the example Intel-based electronic classroom.

3.1.1

Network Environment

The network can be set-up using Windows* NT 4.0 or Novell Netware* on the server. The teacher

station and student computing stations run on Windows 95/98 operating systems. The Intel-based

electronic classroom student computing stations boot up remotely from a server that is connected

in a LAN environment.

Application Note

Intel-Based Electronic Classroom Student Computing Station

3.1.2

Teacher Station Management System

The teacher station in this example can perform the following functions:

• Broadcasting the teacher station screen

All teaching materials, including presentation, animations, and movies can be broadcast to the

student computing stations.

• Controlling student computing stations remotely

The teacher can control, reset, and lock the student computing stations or receive the display

from a particular Intel-based electronic classroom student computing station.

• Providing online help

The teacher can provide help through the network when students have difficulty with their

assignment. The students would also be able to request assistance through the network.

3.1.3

Multimedia Teaching Software

The multimedia teaching software utilizes a standard LAN network interface through TCP/IP

protocol and typically offers the following features:

• Screen broadcasting

— Each computing station (teacher’s and student’s) can broadcast its screen to some or all

students. Only one screen can be broadcast at a time.

— The teacher can lock each student’s keyboard and mouse and can broadcast any student’s

screen to the class.

— All graphics formats, such as MPEG and VCD can be broadcast in real time.

• Audio/voice communication

— The teacher’s voice can be broadcast to one, several, or all students.

— Conferencing is supported in teacher-student, student-student, or other combinations.

— The voice can be input through MIC or Line In on the sound card.

• Remote access

— The teacher can view any student’s screen remotely.

• Grouping

— Student computing stations can be grouped in any combination for discussion

(screen/audio).

• Question

— Students can submit questions through MIC or keyboard (using a special function key).

— Two way or multi-way online questioning is supported, as in a “chat” mode.

• Remote reset

— The teacher can reset any or all Intel-based electronic classroom student computing

stations if an error occurs in the system.

• Examinations can be administered and completed online.

Application Note

Intel-Based Electronic Classroom Student Computing Station

3.1.4

3.1.5

Application Software

Typically, application software, such as word processing and spreadsheet programs, and

instructor-developed materials are taught in Intel-based electronic classrooms. In some Intel-based

electronic classrooms, students are assessed using on-line examinations.

Remote Booting Intel-Based Electronic Classroom Student

Computing Stations from Server

During the remote boot process, the Intel-based electronic classroom student computing stations

contact the server (using Preboot Execution Environment in the boot ROM of the network

interface), install a boot image, and boot the operating system that is pre-configured on the server.

Various operating systems can be remote booted from the server, including Windows 95/98 or

Linux*.

The setup is optimized through the availability of the Preboot Execution Environment (PXE)

compliant boot ROM. PXE allows the server to set up each student computing station with a

specific IP address using the Dynamic Host Communication Protocol (DHCP). The boot ROM

then downloads the boot image from the server using the Trivial File Transfer (TFT) protocol. This

boot image program then configures the student computing stations and boots the pre-configured

operating system. If the Intel-based electronic classroom student computing station’s operating

system or applications are damaged, they can be recovered by downloading the new image from

server when the system restarts. This reduces the total cost of maintenance. Refer to section

Section 5.7.2.2, “Remote Service Boot” on page 22 for more information.

Application Note

Intel-Based Electronic Classroom Student Computing Station

4.0

Recommended Motherboard Configuration for

Intel-Based Electronic Classroom Student

Computing Stations

The motherboard of this reference design for Intel-based electronic classroom student computing

stations is a highly integrated design that incorporates many features on the board. It is

recommended that system designers use an LPX form factor or Flex ATX design. The LPX form

factor enables the student computing stations to have a very slim casing, which is desirable for

small Intel-based electronic classroom environments. Flex ATX helps reduce board size and cost.

The components listed below provide an example of a motherboard design based on the Celeron

processor and Intel 810 chipset.

Main Components of Reference Motherboard for the Intel-Based Electronic Classroom

Student Computing Station:

• Intel^®Celeron™ processor 300A/366/433 MHz in 370-pin PPGA

• Intel^®810 Chipset

• Two DIMM sockets that support up to 512 Mbyte (128 Mbit technology) SDRAM

• Two IDE interfaces

• One floppy disk interface

• COM 1 and COM 2 serials ports and a parallel port

• PS/2 mouse and keyboard connectors

• Intel^®Flash BIOS

• Super I/O* and USB ports

• 1 X PCI 2.2-compliant PCI slot

Peripherals on Intel-Based Electronic Classroom Student Computing Station:

Integrated audio in chipset

• Audio Codec ’97 2.1 extensions compliant

• Stereo line level output

• One audio out, audio in, and MIC jack

Integrated Graphics

• 3-D graphics with texturing and visual enhancements up to 1024x768x16 @85 Hz refresh

• 2-D graphics up to 1600x1200x8 @85 Hz refresh

• RGB output

PCI-based 10/100 Mbps Network card

• Intel^®82559-based card recommended

• One RJ-45 port

• Boot ROM which contains Intel^®Preboot Execution Environment (PXE)

Application Note

Intel-Based Electronic Classroom Student Computing Station

Figure 2.

Building Block of the Intel-Based Electronic Classroom Student Computing Station

Motherboard

Intel Celeron

™

Processor

System Bus

[66 MHz]

Intel 810

Chipset

Display I/F

SDRAM Memory

100 MHz

Monitor

82810

241 BGA

GD82559

2 IDE Port/

Ultra AT A66

Intel Network Controller

Support 10/100 Mbit

One RJ-45 port

One Flash boot ROM

SMBus

82801AA

241 BGA

PCI 33

1 PCI

REQ/GNT

Low Pin

Count Interface

82802AB

4Mb

COM1 & COM 2 Serial Ports

Parallel Port

PS/2 Mouse

AC'97 Riser

AC'97 2.1

Super IO*

Floppy Disk Interface

Keyboard Connectors

A7493-01

Application Note

Intel-Based Electronic Classroom Student Computing Station

5.0

Design Consideration of Intel-Based Electronic

Classroom Student Computing Station Hardware

5.1

Intel^®Celeron™ Processor

This reference configuration supports the Intel Celeron processor at 300, 366 MHz and 433 MHz

in a Plastic Pin Grid Array (PPGA) package.

The Intel Celeron processor PPGA package implements a Dynamic Execution micro-architecture

and executes MMX™ media technology instructions for enhanced media and communication

performance. The Intel Celeron processor PPGA is based on the P6 family processor core and is

provided in a PPGA package for use in low cost systems in the value PC and Intel-based electronic

classroom student computing station market segments. The Intel Celeron processor PPGA utilizes

the AGTL+ system bus used by the Pentium II processor with support limited to single-processor

systems. The Intel Celeron processor PPGA includes an integrated 128 Kbyte second level cache

with separate 16 Kbyte instruction and 16 Kbyte data level-one caches. The second level cache is

capable of caching 4 Gbytes of system memory.

5.1.1

Design Notes for the Intel^®Celeron™ Processor

The schematics use a Single Ended Termination (SET) network topology in which the termination

resistors are located at only the PPGA (processor) side to reduce the system cost, solution space,

and ringing effect. In the SET topology, the termination should be placed close to the processor

either on the motherboard or on the processor substrate. No termination is present at the chipset end

of the network.

Figure 3.

Topology for Single Processor Designs with Single End Termination (SET)

††

Intel 810

Chipset

†

† - 1.9" <L1 <5.0"

†† - 0.5" <L2 <2.0"

A7494-01

Application Note

Intel-Based Electronic Classroom Student Computing Station

5.2

Intel^®810 Chipset

Intel has developed technology that enhances the performance and value of Intel Celeron

processor-powered systems. Built on the strong foundation of Intel 440BX AGPset technology, the

Intel 810 chipset provides next generation features and great graphics performance at a lower cost.

The Intel 810 chipset contains three core components:

1. Host Controller — Graphics and Memory Controller Hub (GMCH0)

The GMCH0 (82810) provides the interconnect between the SDRAM and the rest of the

system logic:

— 421 Mini BGA

— Integrated Graphics controller

— 230 MHz RAMDAC

— Support for Intel Celeron processors with a 66 MHz system bus.

— 100 MHz SDRAM interface supporting 64/256/512 Mbyte with 16/64/128 Mbit SDRAM

technology

— Downstream hub interface for access to the ICH

2. I/O Controller Hub — 82810AA (ICH)

The I/O Controller Hub provides the I/O subsystem with access to the rest of the system:

— 421 Mini BGA

— Upstream hub interface for access to the GMCH0

— PCI 2.2-compliant interface (6 PCI Req/Grant Pairs for 82801AA ICH)

— Bus Master IDE controller; supports either Ultra ATA/33 or Ultra ATA/66 (82801AA)

— USB controller

— SMBus controller

— FWH interface

— LPC interface

— AC’97 2.1 interface

— Integrated System Management Controller

— Alert-on-LAN (82801AA ICH only)

— Interrupt controller

3. 82802 Firmware Hub (FWH)

The 82802 FWH component is a key element to enabling a new security and manageability

infrastructure for the PC platform. The device operates under the FWH interface and protocol.

The hardware features of this device include:

— An integrated hardware Random Number Generator (RNG)

— Register-based locking

— Hardware-based locking

— 5 GPIs

Application Note

Intel-Based Electronic Classroom Student Computing Station

5.2.1

The Intel^®82810 Graphics Memory Controller Hub (GMCH0)

The Intel 810 chipset provides a rich and robust 2-D and 3-D graphics using an integrated chipset

design that utilizes second-generation graphics technology. At the core of the 810 chipset is a

memory controller with built-in graphics technology. The Intel 810 chip optimizes system memory

arbitration, similar to AGP technology, resulting in a more responsive and cost-effective system.

The 82810 Graphics Memory Controller Hub (GMCH0) features Intel graphics technology and

software drivers and uses Direct AGP (integrated AGP) to create vivid 2-D and 3-D effects and

images. The 82810 chip features integrated Hardware Motion Compensation to improve soft DVD

video quality and a digital video out port that enables connection to traditional TVs or the new

space-saving digital flat panel displays.

Intel Dynamic Video Memory Technology (DVMT) is an architecture that offers breakthrough

performance for the Value PC segment through efficient memory utilization and Direct AGP. The

system OS uses the Intel software drivers and intelligent memory arbiter to support richer graphics

applications.

The System Manageability Bus allows networking equipment to monitor the 810-chipset platform.

Using ACPI specifications, the system manageability function enables low-power sleep mode and

conserves energy when the system is idle.

5.2.1.1

Design Notes for the Intel^®82810 GMCH0

The GMCH ball assignment and ICH ball assignment have been optimized to simplify hub

interface routing. It is recommended that the hub interface signals are routed directly from the

GMCH0 to the ICH on the top signal layer. The hub interface has two signal groups:

• Data Signals: HL[10:0]

• Strobe Signals: HL_STB, HL_STB# (differential strobe pair)

There are no pull-ups or pull-downs required on the hub interface.

Hub interface data signals should be routed with a trace width of 5 mils and a trace spacing of

20 mils. These signals can be routed with a trace width of 5 mils and a trace spacing of 15 mils for

navigation around components or mounting holes. To break out of the GMCH0 and the ICH, the

hub interface data signals can be routed with a trace width of 5 mils and a trace spacing of 5 mils.

The signals should be separated to a trace width of 5 mils and a trace spacing of 20 mils within 0.3”

of the GMCH0/ICH components. The maximum trace length for the hub interface data signals is

7”. These signals should each be matched within ±0.1” of the HL_STB and HL_STB# signals.

Due to their differential nature, the hub interface strobe signals should be 5 mils wide and routed

20 mils apart. This strobe pair should be a minimum of 20 mils from any adjacent signals. The

maximum length for the strobe signals is 7” and the two strobes should be the same length.

Additionally, the trace length for each data signal should be matched to the trace length of the

strobes with ±0.1”.

HREF is the hub interface reference voltage. It is 0.5 * 1.8 V = 0.9 V ±2%. It can be generated

locally, or a single HREF divider can be used. Each divider consists of a DC element and an AC

element. The resistors in the DC element should be equal in value and rated at 1% tolerance. The

value of these resistors must be chosen to ensure that the reference voltage tolerance is maintained

over the entire input leakage specification. The resistors in the AC element of the resistor divider

should be no greater than 80 Ω and the capacitors should be 500 pF. Additionally, the reference

voltage should be bypassed to ground at each component with a 0.1 uF capacitor.

Application Note

Intel-Based Electronic Classroom Student Computing Station

5.2.2

The Intel^®82801 I/O Controller Hub (ICH)

The 82801 I/O Controller Hub (ICH) employs the Intel Accelerated Hub Architecture to make a

direct connection from the graphics and memory to the integrated AC97 controller, the IDE

controllers, dual USB ports, and PCI add-in cards.

The Accelerated Hub Architecture provides twice the bandwidth of the PCI bus at 266 MB per

second. This allows a wider flow of rich information from the I/O controller to the memory

controller, with optimized arbitration rules allowing more functions to run concurrently, enabling

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深圳市芯福林电子有限公司服务专线: 13418564337 在线联系:

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深圳市中利达电子科技有限公司服务专线: 0755-83200645/13686833545 在线联系:

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GD82559C产品参数

型号:	GD82559C
是否无铅：	不含铅
是否Rohs认证：	不符合
生命周期：	Obsolete
Reach Compliance Code：	unknown
HTS代码：	8542.31.00.01
风险等级：	5.81
Is Samacsys：	N
JESD-30 代码：	S-PBGA-B196
端子数量：	196
封装主体材料：	PLASTIC/EPOXY
封装代码：	BGA
封装等效代码：	BGA196,14X14,40
封装形状：	SQUARE
封装形式：	GRID ARRAY
电源：	3.3,3.3/5 V
认证状态：	Not Qualified
子类别：	Serial IO/Communication Controllers
表面贴装：	YES
技术：	CMOS
端子形式：	BALL
端子节距：	1 mm
端子位置：	BOTTOM
uPs/uCs/外围集成电路类型：	SERIAL IO/COMMUNICATION CONTROLLER, LAN
Base Number Matches：	1

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