Intel D925XCV, D925XBC User Manual

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Intel® Desktop Board

D925XCV/D925XBC

Technical Product Specification

June 2004

Order Number: C68597-001

The Intel® Desktop Board D925XCV/D925XBC may contain design defects or errors known as errata that may cause the product to deviate from published specifications. Current characterized errata are documented in the Intel Desktop Board D925XCV/D925XBC Specification Update.

Revision History

Revision

Revision History

Date

 

 

 

-001

First release of the Intel® Desktop Board D925XCV/D925XBC Technical

June 2004

 

Product Specification

 

 

 

 

This product specification applies to only standard Intel® Desktop Boards D925XCV and D925XBC with BIOS identifier CV92510A.86A.

Changes to this specification will be published in the Intel Desktop Board D925XCV/D925XBC Specification Update before being incorporated into a revision of this document.

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 Corporation may have patents or pending patent applications, trademarks, copyrights, or other intellectual property rights that relate to the presented subject matter. The furnishing of documents and other materials and information does not provide any license, express or implied, by estoppel or otherwise, to any such patents, trademarks, copyrights, or other intellectual property rights.

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.

Intel® desktop boards 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 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 from:

Intel Corporation

P.O. Box 5937

Denver, CO 80217-9808

or call in North America 1-800-548-4725, Europe 44-0-1793-431-155, France 44-0-1793-421-777, Germany 44-0-1793-421-333, other Countries 708-296-9333.

Intel, Pentium, and Celeron are registered trademarks of Intel Corporation or its subsidiaries in the United States and other countries.

* Other names and brands may be claimed as the property of others.

Preface

This Technical Product Specification (TPS) specifies the board layout, components, connectors, power and environmental requirements, and the BIOS for these Intel® Desktop Boards: D925XCV and D925XBC. It describes the standard product and available manufacturing options.

Intended Audience

The TPS is intended to provide detailed, technical information about the Desktop Boards D925XCV and D925XBC and their components to the vendors, system integrators, and other engineers and technicians who need this level of information. It is specifically not intended for general audiences.

What This Document Contains

Chapter Description

1A description of the hardware used on the Desktop Boards D925XCV and D925XBC

2A map of the resources of the Desktop Boards

3The features supported by the BIOS Setup program

4A description of the BIOS error messages, beep codes, and POST codes

Typographical Conventions

This section contains information about the conventions used in this specification. Not all of these symbols and abbreviations appear in all specifications of this type.

Notes, Cautions, and Warnings

NOTE

Notes call attention to important information.

INTEGRATOR’S NOTES

Integrator’s notes are used to call attention to information that may be useful to system integrators.

CAUTION

Cautions are included to help you avoid damaging hardware or losing data.

iii

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

WARNING

Warnings indicate conditions, which if not observed, can cause personal injury.

Other Common Notation

#Used after a signal name to identify an active-low signal (such as USBP0#)

(NxnX)

When used in the description of a component, N indicates component type, xn are the relative

 

coordinates of its location on the Desktop Boards D925XCV and D925XBC, and X is the

 

instance of the particular part at that general location. For example, J5J1 is a connector,

 

located at 5J. It is the first connector in the 5J area.

 

 

GB

Gigabyte (1,073,741,824 bytes)

 

 

GB/sec

Gigabytes per second

 

 

KB

Kilobyte (1024 bytes)

 

 

Kbit

Kilobit (1024 bits)

 

 

kbits/sec

1000 bits per second

 

 

MB

Megabyte (1,048,576 bytes)

 

 

MB/sec

Megabytes per second

 

 

Mbit

Megabit (1,048,576 bits)

 

 

Mbit/sec

Megabits per second

 

 

xxh

An address or data value ending with a lowercase h indicates a hexadecimal value.

 

 

x.x V

Volts. Voltages are DC unless otherwise specified.

 

 

*

This symbol is used to indicate third-party brands and names that are the property of their

 

respective owners.

 

 

iv

Contents

1 Product Description

1.1

PCI Bus Terminology Change......................................................................................

11

1.2

Board Differences ........................................................................................................

11

1.3

Overview ......................................................................................................................

12

 

1.3.1

Feature Summary..........................................................................................

12

 

1.3.2

Manufacturing Options ..................................................................................

13

 

1.3.3

Board Layouts ...............................................................................................

14

 

1.3.4

Block Diagram ...............................................................................................

18

1.4

Online Support .............................................................................................................

19

1.5

Processor .....................................................................................................................

19

1.6

System Memory ...........................................................................................................

20

 

1.6.1

Memory Configurations .................................................................................

21

1.7

Intel® 925X Chipset......................................................................................................

25

 

1.7.1

USB ...............................................................................................................

25

 

1.7.2

IDE Support ...................................................................................................

25

 

1.7.3

Real-Time Clock, CMOS SRAM, and Battery................................................

28

1.8

PCI Express Connectors..............................................................................................

28

1.9

Auxiliary Power (AUX PWR) Output Connector...........................................................

28

1.10

I/O Controller................................................................................................................

29

 

1.10.1

Serial Port......................................................................................................

29

 

1.10.2

Parallel Port ...................................................................................................

29

 

1.10.3

Diskette Drive Controller................................................................................

30

 

1.10.4

Keyboard and Mouse Interface .....................................................................

30

1.11 Audio Subsystem .........................................................................................................

31

 

1.11.1

Audio Subsystem Software ...........................................................................

31

 

1.11.2

Audio Connectors ..........................................................................................

31

 

1.11.3

8-Channel (7.1) Audio Subsystem.................................................................

32

 

1.11.4

6-Channel (5.1) Audio Subsystem.................................................................

34

1.12 LAN Subsystem ...........................................................................................................

35

1.12.1Marvell Yukon 88E8050 PCI Express 1.0a Integrated MAC/PHY

 

Gigabit Ethernet Controller ............................................................................

35

1.12.2 RJ-45 LAN Connector with Integrated LEDs .................................................

35

1.12.3 Alert Standard Format (ASF) Support ...........................................................

36

1.12.4

LAN Subsystem Software..............................................................................

36

1.13 Hardware Management Subsystem.............................................................................

37

1.13.1 Hardware Monitoring and Fan Control ASIC .................................................

37

1.13.2

Thermal Monitoring........................................................................................

38

1.13.3

Fan Monitoring...............................................................................................

40

1.13.4 Chassis Intrusion and Detection....................................................................

40

1.14 Power Management .....................................................................................................

40

1.14.1

ACPI ..............................................................................................................

40

1.14.2

Hardware Support .........................................................................................

43

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Intel Desktop Board D925XCV/D925XBC Technical Product Specification

1.15 Trusted Platform Module (Optional) .............................................................................

47

1.15.1

System Requirements ...................................................................................

47

1.15.2 Warning of Potential Data Loss .....................................................................

47

1.15.3

Security Precautions......................................................................................

48

1.15.4 Trusted Platform Module Ownership .............................................................

49

1.15.5 Enabling the Trusted Platform Module ..........................................................

50

1.15.6 Assuming Trusted Platform Module Ownership ............................................

50

1.15.7

Recovery Procedures ....................................................................................

51

1.15.8 Clearing Trusted Platform Module Ownership...............................................

52

1.15.9

Software Support...........................................................................................

53

2 Technical Reference

2.1

Introduction ..................................................................................................................

55

2.2

Memory Resources ......................................................................................................

55

 

2.2.1

Addressable Memory.....................................................................................

55

 

2.2.2

Memory Map..................................................................................................

57

2.3

DMA Channels .............................................................................................................

57

2.4

Fixed I/O Map...............................................................................................................

58

2.5

PCI Configuration Space Map......................................................................................

59

2.6

Interrupts ......................................................................................................................

60

2.7

PCI Conventional Interrupt Routing Map .....................................................................

61

2.8

Connectors...................................................................................................................

63

 

2.8.1

Back Panel Connectors .................................................................................

63

 

2.8.2

Component-side Connectors.........................................................................

68

2.9

Jumper Block ...............................................................................................................

80

2.10 Mechanical Considerations ..........................................................................................

81

 

2.10.1

D925XCV Form Factor ..................................................................................

81

 

2.10.2

D925XBC Form Factor ..................................................................................

82

 

2.10.3

I/O Shield.......................................................................................................

83

2.11

Electrical Considerations..............................................................................................

85

 

2.11.1

DC Loading....................................................................................................

85

 

2.11.2

Add-in Board Considerations.........................................................................

85

 

2.11.3

Fan Connector Current Capability .................................................................

86

 

2.11.4

Power Supply Considerations .......................................................................

86

2.12 Thermal Considerations ...............................................................................................

87

2.13

Reliability......................................................................................................................

89

2.14 Environmental ..............................................................................................................

90

2.15 Regulatory Compliance................................................................................................

91

 

2.15.1

Safety Regulations ........................................................................................

91

 

2.15.2

EMC Regulations...........................................................................................

91

 

2.15.3

European Union Declaration of Conformity Statement..................................

92

 

2.15.4

Product Ecology Statements .........................................................................

93

 

2.15.5

Product Certification Markings (Board Level) ................................................

94

vi

Contents

3 Overview of BIOS Features

3.1

Introduction ..................................................................................................................

95

3.2

BIOS Flash Memory Organization ...............................................................................

96

3.3

Resource Configuration ...............................................................................................

96

 

3.3.1

PCI Autoconfiguration....................................................................................

96

 

3.3.2

PCI IDE Support ............................................................................................

96

3.4

System Management BIOS (SMBIOS) ........................................................................

97

3.5

Legacy USB Support....................................................................................................

97

3.6

BIOS Updates ..............................................................................................................

98

 

3.6.1

Language Support .........................................................................................

98

 

3.6.2

Custom Splash Screen..................................................................................

98

3.7

Boot Options ................................................................................................................

99

 

3.7.1

CD-ROM Boot ...............................................................................................

99

 

3.7.2

Network Boot .................................................................................................

99

 

3.7.3

Booting Without Attached Devices ................................................................

99

 

3.7.4

Changing the Default Boot Device During POST ..........................................

99

3.8

Fast Booting Systems with Intel® Rapid BIOS Boot...................................................

100

 

3.8.1

Peripheral Selection and Configuration .......................................................

100

 

3.8.2

Intel Rapid BIOS Boot .................................................................................

100

3.9

BIOS Security Features .............................................................................................

101

4 Error Messages and Beep Codes

4.1

BIOS Error Messages ................................................................................................

103

4.2

Port 80h POST Codes ...............................................................................................

105

4.3

Bus Initialization Checkpoints ....................................................................................

109

4.4

Speaker .....................................................................................................................

110

4.5

BIOS Beep Codes......................................................................................................

110

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Intel Desktop Board D925XCV/D925XBC Technical Product Specification

Figures

 

1.

Desktop Board D925XCV Components .......................................................................

14

2.

Desktop Board D925XBC Components .......................................................................

16

3.

Block Diagram..............................................................................................................

18

4.

Memory Channel and DIMM Configuration..................................................................

21

5.

Dual Channel (Interleaved) Mode Configuration with Two DIMMs ..............................

22

6.

Dual Channel (Interleaved) Mode Configuration with Three DIMMs............................

22

7.

Dual Channel (Interleaved) Mode Configuration with Four DIMMs..............................

23

8.

Single Channel (Asymmetric) Mode Configuration with One DIMM.............................

24

9.

Single Channel (Asymmetric) Mode Configuration with Three DIMMs ........................

24

10.

Front/Back Panel Audio Connector Options for 8-Channel (7.1) Audio Subsystem ....

32

11.

8-channel (7.1) Audio Subsystem Block Diagram........................................................

33

12.

Front/Back Panel Audio Connector Options for 6-Channel (5.1) Audio Subsystem ....

34

13.

6-Channel (5.1) Audio Subsystem Block Diagram.......................................................

34

14.

LAN Connector LED Locations ....................................................................................

35

15.

Thermal Monitoring for D925XCV Board .....................................................................

38

16.

Thermal Monitoring for D925XBC Board .....................................................................

39

17.

Location of the Standby Power Indicator LED on the D925XCV Board.......................

46

18.

Detailed System Memory Address Map.......................................................................

56

19.

Back Panel Connectors for 8-Channel (7.1) Audio Subsystem ...................................

64

20.

Back Panel Connectors for 6-Channel (5.1) Audio Subsystem ...................................

66

21.

D925XCV Component-side Connectors ......................................................................

68

22.

D925XBC Component-side Connectors ......................................................................

70

23.

Connection Diagram for Front Panel Connector ..........................................................

77

24.

Connection Diagram for Front Panel USB Connectors................................................

78

25.

Connection Diagram for IEEE 1394a Connectors........................................................

79

26.

Location of the Jumper Block.......................................................................................

80

27.

Desktop Board D925XCV Dimensions.........................................................................

81

28.

Desktop Board D925XBC Dimensions.........................................................................

82

29.

I/O Shield Dimensions for Boards with the 8-Channel (7.1) Audio Subsystem............

83

30.

I/O Shield Dimensions for Boards with the 6-Channel (5.1) Audio Subsystem............

84

31.

Processor Heatsink for Omni-directional Airflow..........................................................

87

32.

Localized High Temperature Zones .............................................................................

88

Tables

 

 

1.

Summary of Board Differences ....................................................................................

11

2.

Feature Summary ........................................................................................................

12

3.

Manufacturing Options .................................................................................................

13

4.

D925XCV Components Shown in Figure 1..................................................................

15

5.

D925XBC Components Shown in Figure 2..................................................................

17

6.

Supported Memory Configurations ..............................................................................

20

7.

LAN Connector LED States .........................................................................................

35

8.

Effects of Pressing the Power Switch ..........................................................................

41

9.

Power States and Targeted System Power .................................................................

42

10.

Wake-up Devices and Events ......................................................................................

43

11.

System Memory Map ...................................................................................................

57

12.

DMA Channels .............................................................................................................

57

13.

I/O Map ........................................................................................................................

58

viii

Contents

14.

PCI Configuration Space Map......................................................................................

59

15.

Interrupts ......................................................................................................................

60

16.

PCI Interrupt Routing Map ...........................................................................................

62

17.

Back Panel Connectors Shown in Figure 19................................................................

65

18.

Back Panel Connectors Shown in Figure 20................................................................

67

19.

D925XCV Component-side Connectors Shown in Figure 21. .....................................

69

20.

D925XBC Component-side Connectors Shown in Figure 22. .....................................

71

21.

ATAPI CD-ROM Connector .........................................................................................

72

22.

Front Panel Audio Connector.......................................................................................

72

23.

Front Chassis Fan and Rear Chassis Fan Connectors...............................................

72

24.

Processor Fan Connector and Auxiliary Rear Fan Connector ....................................

72

25.

Chassis Intrusion Connector ........................................................................................

73

26.

SCSI Hard Drive Activity LED Connector (Optional)....................................................

73

27.

Serial ATA Connectors.................................................................................................

73

28.

Auxiliary Power Output Connector ...............................................................................

73

29.

Main Power Connector.................................................................................................

75

30.

ATX12V Power Connector ...........................................................................................

75

31.

Alternate Power Connector ..........................................................................................

75

32.

Auxiliary Front Panel Power/Sleep LED Connector .....................................................

76

33.

Front Panel Connector .................................................................................................

76

34.

States for a One-Color Power LED ..............................................................................

77

35.

States for a Two-Color Power LED ..............................................................................

77

36.

BIOS Setup Configuration Jumper Settings.................................................................

80

37.

DC Loading Characteristics .........................................................................................

85

38.

Fan Connector Current Capability................................................................................

86

39.

Thermal Considerations for Components ....................................................................

89

40.

Desktop Board D925XCV/D925XBC Environmental Specifications ............................

90

41.

Safety Regulations .......................................................................................................

91

42.

EMC Regulations .........................................................................................................

91

43.

Product Certification Markings .....................................................................................

94

44.

BIOS Setup Program Menu Bar...................................................................................

96

45.

BIOS Setup Program Function Keys............................................................................

96

46.

Boot Device Menu Options ..........................................................................................

99

47.

Supervisor and User Password Functions .................................................................

101

48.

BIOS Error Messages ................................................................................................

103

49.

Uncompressed INIT Code Checkpoints.....................................................................

105

50.

Boot Block Recovery Code Checkpoints ...................................................................

105

51.

Runtime Code Uncompressed in F000 Shadow RAM ...............................................

106

52.

Bus Initialization Checkpoints ....................................................................................

109

53.

Upper Nibble High Byte Functions .............................................................................

109

54.

Lower Nibble High Byte Functions .............................................................................

110

55.

Beep Codes ...............................................................................................................

111

ix

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

x

1 Product Description

What This Chapter Contains

 

1.1

PCI Bus Terminology Change......................................................................................

11

1.2

Board Differences ........................................................................................................

11

1.3

Overview ......................................................................................................................

12

1.4

Online Support .............................................................................................................

19

1.5

Processor .....................................................................................................................

19

1.6

System Memory ...........................................................................................................

20

1.7

Intel® 925X Chipset......................................................................................................

25

1.8

PCI Express Connectors..............................................................................................

28

1.9

Auxiliary Power (AUX PWR) Output Connector...........................................................

28

1.10

I/O Controller................................................................................................................

29

1.11

Audio Subsystem .........................................................................................................

31

1.12

LAN Subsystem ...........................................................................................................

35

1.13

Hardware Management Subsystem.............................................................................

37

1.14

Power Management .....................................................................................................

40

1.1 PCI Bus Terminology Change

Previous generations of Intel® Desktop Boards used an add-in card connector referred to as PCI. This generation of Intel Desktop Boards adds a new technology for add-in cards: PCI Express*. The 32-bit parallel bus previously referred to as PCI is now called PCI Conventional.

1.2 Board Differences

This TPS describes these Intel Desktop Boards: D925XCV and D925XBC. The Desktop Boards are identical with the exception of the items listed in Table 1.

Table 1.

Summary of Board Differences

 

 

 

D925XCV

 

• ATX Form Factor (10.20 inches by 9.60 inches [259.08 millimeters by

 

 

243.84 millimeters])

 

 

• Four PCI Conventional bus add-in card connectors

 

 

• Two PCI Express x1 bus add-in card connectors

 

 

• Auxiliary rear fan connector

 

 

• Option for auxiliary power output connector

 

 

• Option for SCSI hard drive indicator LED

 

 

• Option for Trusted Platform Module (TPM)

 

 

 

D925XBC

 

• microATX Form Factor (9.60 inches by 9.60 inches [243.84 millimeters by

 

 

243.84 millimeters])

 

 

• Two PCI Conventional bus add-in card connectors

 

 

• One PCI Express x1 bus add-in card connector

 

 

 

11

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

NOTE

Most of the illustrations in this document show only the Desktop Board D925XCV. When there are significant differences between the two Desktop Boards, illustrations of both boards are provided.

1.3 Overview

1.3.1Feature Summary

Table 2 summarizes the major features of the Desktop Boards D925XCV and D925XBC.

Table 2. Feature Summary

Form Factor

D925XCV: ATX (10.20 inches by 9.60 inches [259.08 millimeters by

 

 

243.84 millimeters])

 

• D925XBC: microATX (9.60 inches by 9.60 inches [243.84 millimeters by

 

 

243.84 millimeters])

 

 

Processor

Support for an Intel® Pentium® 4 processor in an LGA775 socket with an 800 or

 

533 MHz system bus

 

 

Memory

• Four 240-pin DDR2 SDRAM Dual Inline Memory Module (DIMM) sockets

 

• Support for DDR2 400 MHz and DDR2 533 MHz DIMMs

 

• Support for up to 4 GB of system memory

 

 

Chipset

Intel® 925X Chipset, consisting of:

 

• Intel® 82925X Memory Controller Hub (MCH)

 

• Intel® 82801FR I/O Controller Hub (ICH6-R)

 

• 8 Mbit Firmware Hub (FWH)

 

 

Video

One PCI Express x16 connector supporting PCI Express x16 graphics cards

 

 

Audio

Intel® High Definition Audio subsystem

I/O Control

LPC Bus I/O controller

 

 

USB

Support for USB 2.0 devices

 

 

 

Peripheral

Eight USB ports

Interfaces

One serial port

 

 

One parallel port

 

• Four Serial ATA interfaces

 

• One Parallel ATA IDE interface with UDMA 33, ATA-66/100 support

 

• One diskette drive interface

 

• PS/2* keyboard and mouse ports

 

 

BIOS

• Intel/AMI BIOS (resident in the 8 Mbit FWH)

 

• Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,

 

 

and SMBIOS

 

 

Instantly Available

• Support for PCI Local Bus Specification Revision 2.2

PC Technology

• Support for PCI Express Revision 1.0a

 

 

• Suspend to RAM support

 

• Wake on PCI, RS-232, front panel, PS/2 devices, and USB ports

 

 

 

 

 

continued

12

Product Description

Table 2.

Feature Summary (continued)

 

 

LAN Support

Gigabit (10/100/1000 Mbits/sec) LAN subsystem using the Marvell* Yukon*

 

 

88E8050 PCI Express Gigabit Ethernet Controller

 

 

 

Expansion

 

• D925XCV: Four PCI Conventional bus add-in card connectors (SMBus routed

Capabilities

to PCI Conventional bus connector 2), two PCI Express x1 bus add-in card

 

 

connectors, and one PCI Express x16 bus add-in card connector

 

 

• D925XBC: Two PCI Conventional bus add-in card connectors (SMBus routed to

 

 

PCI Conventional bus connector 2), one PCI Express x1 bus add-in card

 

 

connector, and one PCI Express x16 bus add-in card connector

 

 

Hardware Monitor

• Hardware monitoring and fan control ASIC

Subsystem

 

• Voltage sense to detect out of range power supply voltages

 

 

Thermal sense to detect out of range thermal values

Three fan connectors

Three fan sense inputs used to monitor fan activity

Fan speed control

1.3.2Manufacturing Options

Table 3 describes the manufacturing options on the Desktop Boards D925XCV and D925XBC. Not every manufacturing option is available in all marketing channels. Please contact your Intel representative to determine which manufacturing options are available to you.

Table 3. Manufacturing Options

 

Audio Subsystem

Intel High Definition Audio subsystem in one of the following configurations:

 

 

• 8-channel (7.1) audio subsystem with five analog audio outputs and two S/PDIF

 

 

digital audio outputs (coaxial and optical) using the Realtek* ALC880 audio codec

 

 

• 6-channel (5.1) audio subsystem with three analog audio outputs using the

 

 

Realtek ALC860 audio codec

 

 

 

 

 

 

 

Alternate (ALT)

Provides required additional power when using a power supply with a 20-pin (2x10)

 

Power Input

main power connector. Not required when using a power supply with a 24-pin (2x12)

 

Connector

main power connector.

 

 

 

 

 

 

 

Auxiliary (AUX)

Provides power for internal chassis lighting (D925XCV board only)

 

Power Output

 

 

 

 

Connector

 

 

 

 

 

 

 

 

IEEE-1394a

IEEE-1394a controller and three IEEE-1394a connectors (one back panel connector,

 

Interface

two front-panel connectors)

 

 

 

 

 

 

 

SCSI Hard Drive

Allows add-in hard drive controllers (SCSI or other) to use the same LED as the

 

Activity LED

onboard IDE controller. (D925XCV board only)

 

 

 

Connector

 

 

 

 

 

 

 

 

Trusted Platform

A component that enhances platform security (D925XCV board only)

 

Module (TPM)

 

 

 

 

 

 

 

 

 

For information about

Refer to

 

 

 

 

 

Available configurations for the Desktop Boards D925XCV and D925XBC

Section 1.4, page 19

 

 

 

 

 

13

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

1.3.3Board Layouts

Figure 1 shows the location of the major components on the Desktop Board D925XCV.

A

B C D E

 

F G H

I

J

 

 

MM

 

 

 

 

 

 

 

 

K

 

 

 

 

 

 

 

 

 

L

 

 

 

 

 

 

 

 

 

M

LL

 

 

 

 

 

 

 

 

 

KK

 

 

 

 

 

 

 

 

 

JJ

 

 

 

 

 

 

 

 

M

II

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O

 

 

 

 

 

 

 

 

 

HH

 

 

 

 

 

 

 

 

P

 

 

 

 

 

 

 

 

 

GG

 

 

 

 

 

 

 

 

Q

FF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EE

 

 

 

 

 

 

 

 

 

 

DD

BB

Z

 

X

 

 

 

 

 

CC

 

AA

Y

W V

U

T

S

R

 

 

 

 

 

 

 

 

 

OM16676

Figure 1. Desktop Board D925XCV Components

Table 4 lists the D925XCV components identified in Figure 1.

14

Product Description

Table 4. D925XCV Components Shown in Figure 1.

Item/callout from Figure 1

Description

 

 

A

Auxiliary rear fan connector

 

 

B

ATAPI CD-ROM connector

 

 

C

PCI Express x1 bus add-in card connectors

 

 

D

Audio codec

 

 

E

Front panel audio connector

 

 

F

PCI Conventional bus add-in card connectors

 

 

G

Marvell Yukon 88E8050 PCI Express Gigabit Ethernet Controller

 

 

H

PCI Express x16 bus add-in card connector

 

 

I

Rear chassis fan connector

 

 

J

Back panel connectors

 

 

K

Alternate power connector

 

 

L

+12V power connector (ATX12V)

 

 

M

LGA775 processor socket

 

 

N

Processor fan connector

 

 

O

Intel 82925X MCH

 

 

P

DIMM Channel A sockets

 

 

Q

DIMM Channel B sockets

 

 

R

I/O controller

 

 

S

Power connector

 

 

T

Diskette drive connector

 

 

U

Parallel ATE IDE connector

 

 

V

Battery

 

 

W

Chassis intrusion connector

 

 

X

BIOS Setup configuration jumper block

 

 

Y

8 Mbit Firmware Hub (FWH)

 

 

Z

Front chassis fan connector

 

 

AA

Serial ATA connectors

 

 

BB

Auxiliary front panel power LED connector

 

 

CC

Front panel connector

 

 

DD

SCSI hard drive indicator LED (optional)

 

 

EE

Auxiliary power output connector (optional)

 

 

FF

Front panel USB connector

 

 

GG

TPM component (optional)

 

 

HH

Front panel USB connector

 

 

II

Intel 82801FR I/O Controller Hub (ICH6-R)

 

 

JJ

Front panel IEEE-1394a connectors (optional)

 

 

KK

IEEE-1394a controller (optional)

 

 

LL

Speaker

 

 

MM

PCI Conventional bus add-in card connectors

 

 

15

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

Figure 2 shows the location of the major components on the Desktop Board D925XBC.

 

A B

 

C D E

F

G

 

 

 

 

 

 

 

 

 

 

H

 

 

 

 

 

 

 

 

I

HH

 

 

 

 

 

 

 

 

GG

 

 

 

 

 

 

 

 

FF

 

 

 

 

 

 

 

J

 

 

 

 

 

 

 

 

EE

 

 

 

 

 

 

 

 

DD

 

 

 

 

 

 

 

K

CC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L

 

 

 

 

 

 

 

 

BB

 

 

 

 

 

 

 

M

 

 

 

 

 

 

 

 

AA

 

 

 

 

 

 

 

N

 

 

 

 

 

 

 

 

Z

 

 

 

 

 

 

 

 

Y

W

 

U

 

 

 

 

 

 

X

V

T

S

R

Q

P

O

 

 

 

 

 

 

 

 

OM16686

Figure 2. Desktop Board D925XBC Components

Table 5 lists the D925XCV components identified in Figure 2.

16

Product Description

Table 5. D925XBC Components Shown in Figure 2.

Item/callout from Figure 2

Description

 

 

A

Audio codec

 

 

B

Front panel audio connector

 

 

C

PCI Conventional bus add-in card connectors

 

 

D

Marvell Yukon 88E8050 PCI Express Gigabit Ethernet Controller

 

 

E

PCI Express x16 bus add-in card connector

 

 

F

Rear chassis fan connector

 

 

G

Back panel connectors

 

 

H

Alternate power connector

 

 

I

+12V power connector (ATX12V)

 

 

J

LGA775 processor socket

 

 

K

Processor fan connector

 

 

L

Intel 82925X MCH

 

 

M

DIMM Channel A sockets

 

 

N

DIMM Channel B sockets

 

 

O

I/O controller

 

 

P

Power connector

 

 

Q

Diskette drive connector

 

 

R

Parallel ATE IDE connector

 

 

S

Battery

 

 

T

Chassis intrusion connector

 

 

U

BIOS Setup configuration jumper block

 

 

V

8 Mbit Firmware Hub (FWH)

 

 

W

Front chassis fan connector

 

 

X

Serial ATA connectors

 

 

Y

Auxiliary front panel power LED connector

 

 

Z

Front panel connector

 

 

AA

Front panel USB connector

 

 

BB

Front panel USB connector

 

 

CC

Intel 82801FR I/O Controller Hub (ICH6-R)

 

 

DD

Front panel IEEE-1394a connectors (optional)

 

 

EE

IEEE-1394a controller (optional)

 

 

FF

Speaker

 

 

GG

ATAPI CD-ROM connector

 

 

HH

PCI Express x1 bus add-in card connector

 

 

17

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

1.3.4Block Diagram

Figure 3 is a block diagram of the major functional areas of the boards.

 

PCI Express x1 Interface

 

 

Gigabit Ethernet

LAN

 

 

 

Controller

Connector

 

 

 

 

 

PCI Express x1 Slot 1

 

 

 

 

 

Back Panel/Front Panel

 

 

 

 

 

USB

PCI Express x1 Slot 2

D925XCV

 

 

 

 

USB Ports

 

 

 

 

 

 

only

 

 

 

 

 

 

 

 

 

 

 

LPC Bus

 

Serial Ports

Parallel ATA

Parallel ATA

 

 

 

Parallel Port

 

 

I/O

 

 

 

 

PS/2 Mouse

IDE Connector

IDE Interface

 

 

Controller

 

 

 

 

 

 

 

 

PS/2 Keyboard

LGA775

System Bus

 

 

 

 

 

Diskette Drive

Processor Socket

(800/533 MHz)

 

 

 

 

 

Connector

 

 

 

 

 

LPC Bus

 

PCI Express

 

 

Interconnect

 

 

 

 

x16 Interface

Intel 82925X

Intel 82801FR

 

8 Mbit

 

 

 

Memory Controller

I/O Controller Hub

 

Firmware Hub

PCI Express

Hub (MCH)

(ICH6-R)

 

(FWH)

x16

 

 

DMI

 

 

 

 

Connector

 

 

 

 

Bus

Intel 925X Chipset

 

 

 

 

 

 

 

 

 

 

 

Dual-Channel

 

 

 

 

LPC

TPM Component

Channel A

Memory Bus

 

 

 

 

 

 

 

 

 

 

(Optional)

SMBus

 

 

 

 

DIMMs (2)

 

Link

 

 

 

Channel B

 

 

 

Serial ATA

Serial ATA IDE

 

 

 

Audio

 

 

 

IDE Interface

Connectors (4)

DIMMs (2)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IEEE-1394a Connectors

 

 

Definition

Front Panel Retasking Jack A/E

PCI Bus

 

Front Panel Retasking Jack F

(Optional)

 

 

 

High

 

 

 

 

 

 

 

 

PCI Bus

 

 

 

 

Mic In/Retasking Jack B

PCI Slot 1

 

 

 

 

 

Line In/Retasking Jack C

 

 

 

 

Audio

 

 

 

 

 

 

 

Line Out/Retasking Jack D

PCI Slot 2

SMBus

 

 

Codec

 

 

 

 

PCI Slot 3

 

 

 

 

 

 

CD-ROM

 

 

 

 

 

 

 

D925XCV

Hardware Monitoring

 

 

 

S/PDIF

PCI Slot 4

only

 

 

 

 

 

 

 

 

 

and Fan Control ASIC

 

 

 

 

Center and LFE/Retasking Jack G

= connector or socket

 

Surround Left-Right/Retasking Jack H

 

 

 

 

OM16999

 

 

Figure 3. Block Diagram

18

Product Description

1.4 Online Support

To find information about…

Visit this World Wide Web site:

Intel Desktop Boards D925XCV and

http://www.intel.com/design/motherbd

D925XBC under “Desktop Board

 

Products” or “Desktop Board Support”

http://support.intel.com/support/motherboards/desktop

 

 

Available configurations for the Desktop

http://developer.intel.com/design/motherbd/cv/cv_available.htm

Board D925XCV

 

 

 

Available configurations for the Desktop

http://developer.intel.com/design/motherbd/bc/bc_available.htm

Board D925XBC

 

 

 

Processor data sheets

http://www.intel.com/design/litcentr

 

 

ICH6-R addressing

http://developer.intel.com/design/chipsets/datashts

 

 

Custom splash screens

http://intel.com/design/motherbd/gen_indx.htm

 

 

Audio software and utilities

http://www.intel.com/design/motherbd

 

 

LAN software and drivers

http://www.intel.com/design/motherbd

 

 

1.5 Processor

The boards are designed to support Intel Pentium 4 processors in an LGA775 processor socket with an 800 or 533 MHz system bus. See the Intel web site listed below for the most up-to-date list of supported processors.

For information about…

Refer to:

Supported processors for the D925XCV board

http://www.intel.com/design/motherbd/cv/cv_proc.htm

 

 

Supported processors for the D925XBC board

http://www.intel.com/design/motherbd/bc/bc_proc.htm

 

 

CAUTION

Use only the processors listed on web site above. Use of unsupported processors can damage the board, the processor, and the power supply.

INTEGRATOR’S NOTES

Use only ATX12V-compliant power supplies.

For information about

Refer to

Power supply connectors

Section 2.8.1.1, page 64

 

 

19

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

1.6 System Memory

The boards have four DIMM sockets and support the following memory features:

1.8 V (only) DDR2 SDRAM DIMMs

Unbuffered, single-sided or double-sided DIMMs with the following restriction: Double-sided DIMMS with x16 organization are not supported.

4 GB maximum total system memory. Refer to Section 2.2.1 on page 55 for information on the total amount of addressable memory.

Minimum total system memory: 128 MB

Non-ECC DIMMs

Serial Presence Detect

DDR2 533 MHz or DDR2 400 MHz SDRAM DIMMs

NOTES

Remove the PCI Express x16 video card before installing or upgrading memory to avoid interference with the memory retention mechanism.

To be fully compliant with all applicable DDR SDRAM memory specifications, the board should be populated with DIMMs that support the Serial Presence Detect (SPD) data structure. This allows the BIOS to read the SPD data and program the chipset to accurately configure memory settings for optimum performance. If non-SPD memory is installed, the BIOS will attempt to correctly configure the memory settings, but performance and reliability may be impacted or the DIMMs may not function under the determined frequency.

Table 6 lists the supported DIMM configurations.

Table 6.

Supported Memory Configurations

 

 

 

 

 

 

 

DIMM

 

 

SDRAM

SDRAM Organization

Number of SDRAM

Capacity

 

Configuration

Density

Front-side/Back-side

Devices

 

 

 

 

 

 

128 MB

 

SS

256 Mbit

16 M x 16/empty

4

 

 

 

 

 

 

256 MB

 

SS

256 Mbit

32 M x 8/empty

8

 

 

 

 

 

 

256 MB

 

SS

512 Mbit

32 M x 16/empty

4

 

 

 

 

 

 

512 MB

 

DS

256 Mbit

32 M x 8/32 M x 8

16

 

 

 

 

 

 

512 MB

 

SS

512 Mbit

64 M x 8/empty

8

 

 

 

 

 

 

512 MB

 

SS

1 Gbit

64 M x 16/empty

4

 

 

 

 

 

 

1024 MB

 

DS

512 Mbit

64 M x 8/64 M x 8

16

 

 

 

 

 

 

1024 MB

 

SS

1 Gbit

128 M x 8/empty

8

 

 

 

 

 

 

2048 MB

 

DS

1 Gbit

128 M x 8/128 M x 8

16

 

 

 

 

 

 

Note: In the second column, “DS” refers to double-sided memory modules (containing two rows of SDRAM) and “SS” refers to single-sided memory modules (containing one row of SDRAM).

INTEGRATOR’S NOTE

Refer to Section 2.2.1, on page 55 for additional information on available memory.

20

Product Description

1.6.1Memory Configurations

The Intel 82925X MCH supports two types of memory organization:

Dual channel (Interleaved) mode. This mode offers the highest throughput for real world applications. Dual channel mode is enabled when the installed memory capacities of both DIMM channels are equal. Technology and device width can vary from one channel to the other but the installed memory capacity for each channel must be equal. If different speed DIMMs are used between channels, the slowest memory timing will be used.

Single channel (Asymmetric) mode. This mode is equivalent to single channel bandwidth operation for real world applications. This mode is used when only a single DIMM is installed or the memory capacities are unequal. Technology and device width can vary from one channel to the other. If different speed DIMMs are used between channels, the slowest memory timing will be used.

Figure 4 illustrates the memory channel and DIMM configuration.

NOTE

The DIMM0 sockets of both channels are blue. The DIMM1 sockets of both channels are black.

Channel A, DIMM 0

Channel A, DIMM 1

Channel B, DIMM 0

Channel B, DIMM 1

OM16677

Figure 4. Memory Channel and DIMM Configuration

21

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

1.6.1.1Dual Channel (Interleaved) Mode Configurations

Figure 5 shows a dual channel configuration using two DIMMs. In this example, the DIMM0 (blue) sockets of both channels are populated with identical DIMMs.

 

 

 

 

 

 

 

 

 

 

 

 

Channel A, DIMM 0

 

 

 

1 GB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Channel A, DIMM 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Channel B, DIMM 0

 

 

 

1 GB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Channel B, DIMM 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OM17123

Figure 5. Dual Channel (Interleaved) Mode Configuration with Two DIMMs

Figure 6 shows a dual channel configuration using three DIMMs. In this example, the combined capacity of the two DIMMs in Channel A equal the capacity of the single DIMM in the DIMM0 (blue) socket of Channel B.

 

 

 

 

 

 

 

 

 

 

 

 

Channel A, DIMM 0

 

 

 

256 MB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

256 MB

 

 

 

Channel A, DIMM 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Channel B, DIMM 0

 

 

 

512 MB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Channel B, DIMM 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OM17122

Figure 6. Dual Channel (Interleaved) Mode Configuration with Three DIMMs

22

Product Description

Figure 7 shows a dual channel configuration using four DIMMs. In this example, the combined capacity of the two DIMMs in Channel A equal the combined capacity of the two DIMMs in Channel B. Also, the DIMMs are matched between DIMM0 and DIMM1 of both channels.

 

 

 

 

 

 

 

 

 

 

 

 

Channel A, DIMM 0

 

 

 

256 MB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

512 MB

 

 

 

Channel A, DIMM 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Channel B, DIMM 0

 

 

 

256 MB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

512 MB

 

 

 

Channel B, DIMM 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OM17124

Figure 7. Dual Channel (Interleaved) Mode Configuration with Four DIMMs

23

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

1.6.1.2Single Channel (Asymmetric) Mode Configurations

NOTE

Dual channel (Interleaved) mode configurations provide the highest memory throughput.

Figure 8 shows a single channel configuration using one DIMM. In this example, only the DIMM0 (blue) socket of Channel A is populated. Channel B is not populated.

 

 

 

 

 

 

 

 

 

 

 

Channel A, DIMM 0

 

 

 

256 MB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Channel A, DIMM 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Channel B, DIMM 0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Channel B, DIMM 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OM17125

Figure 8. Single Channel (Asymmetric) Mode Configuration with One DIMM

Figure 9 shows a single channel configuration using three DIMMs. In this example, the combined capacity of the two DIMMs in Channel A does not equal the capacity of the single DIMM in the DIMM0 (blue) socket of Channel B.

 

 

 

 

 

 

 

 

 

 

 

 

Channel A, DIMM 0

 

 

 

256 MB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

512 MB

 

 

 

Channel A, DIMM 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Channel B, DIMM 0

 

 

 

512 MB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Channel B, DIMM 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OM17126

Figure 9. Single Channel (Asymmetric) Mode Configuration with Three DIMMs

24

Product Description

1.7 Intel® 925X Chipset

The Intel 925X chipset consists of the following devices:

Intel 82925X Memory Controller Hub (MCH) with Direct Media Interface (DMI) interconnect

Intel 82801FR I/O Controller Hub (ICH6-R) with DMI interconnect

Firmware Hub (FWH)

The MCH is a centralized controller for the system bus, the memory bus, the PCI Express bus, and the DMI interconnect. The ICH6-R is a centralized controller for the board’s I/O paths. The FWH provides the nonvolatile storage of the BIOS.

For information about

Refer to

The Intel 925X chipset

http://developer.intel.com/

 

 

Resources used by the chipset

Chapter 2

 

 

1.7.1USB

The boards support up to eight USB 2.0 ports, supports UHCI and EHCI, and uses UHCIand EHCI-compatible drivers.

The ICH6-R provides the USB controller for all ports. The port arrangement is as follows:

Four ports are implemented with dual stacked back panel connectors adjacent to the audio connectors

Four ports are routed to two separate front panel USB connectors

NOTES

Computer systems that have an unshielded cable attached to a USB port may not meet FCC Class B requirements, even if no device is attached to the cable. Use shielded cable that meets the requirements for full-speed devices.

For information about

Refer to

The location of the USB connectors on the back panel

Figure 20, page 66

 

 

The location of the front panel USB connectors on the Desktop Board D925XCV

Figure 21, page 68

 

 

The location of the front panel USB connectors on the Desktop Board D925XBC

Figure 22, page 70

 

 

1.7.2IDE Support

The board provides five IDE interface connectors:

One parallel ATA IDE connector, which supports two devices

Four serial ATA IDE connectors, which support one device per connector

1.7.2.1Parallel ATE IDE Interface

The ICH6-R’s Parallel ATA IDE controller has one bus-mastering Parallel ATA IDE interface. The Parallel ATA IDE interface supports the following modes:

Programmed I/O (PIO): processor controls data transfer.

8237-style DMA: DMA offloads the processor, supporting transfer rates of up to 16 MB/sec.

25

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

Ultra DMA: DMA protocol on IDE bus supporting host and target throttling and transfer rates of up to 33 MB/sec.

ATA-66: DMA protocol on IDE bus supporting host and target throttling and transfer rates of up to 66 MB/sec. ATA-66 protocol is similar to Ultra DMA and is device driver compatible.

ATA-100: DMA protocol on IDE bus allows host and target throttling. The ICH6-R’s ATA-100 logic can achieve read transfer rates up to 100 MB/sec and write transfer rates up to 88 MB/sec.

NOTE

ATA-66 and ATA-100 are faster timings and require a specialized cable to reduce reflections, noise, and inductive coupling.

The Parallel ATA IDE interface also supports ATAPI devices (such as CD-ROM drives) and ATA devices using the transfer modes.

The BIOS supports Logical Block Addressing (LBA) and Extended Cylinder Head Sector (ECHS) translation modes. The drive reports the transfer rate and translation mode to the BIOS.

The boards support Laser Servo (LS-120) diskette technology through the Parallel ATA IDE interfaces. An LS-120 drive can be configured as a boot device by setting the BIOS Setup program’s Boot menu to one of the following:

ARMD-FDD (ATAPI removable media device – floppy disk drive)

ARMD-HDD (ATAPI removable media device – hard disk drive)

For information about

Refer to

The location of the Parallel ATA IDE connector on the D925XCV board

Figure 21, page 68

 

 

The location of the Parallel ATA IDE connector on the D925XBC board

Figure 22, page 70

 

 

1.7.2.2Serial ATA Interfaces

The ICH6-R’s Serial ATA controller offers four independent Serial ATA ports with a theoretical maximum transfer rate of 150 MB/s per port. One device can be installed on each port for a maximum of four Serial ATA devices. A point-to-point interface is used for host to device connections, unlike Parallel ATA IDE which supports a master/slave configuration and two devices per channel.

For compatibility, the underlying Serial ATA functionality is transparent to the operating system. The Serial ATA controller can operate in both legacy and native modes. In legacy mode, standard IDE I/O and IRQ resources are assigned (IRQ 14 and 15). In Native mode, standard PCI Conventional bus resource steering is used. Native mode is the preferred mode for configurations using the Windows XP and Windows 2000 operating systems.

NOTE

Many Serial ATA drives use new low-voltage power connectors and require adaptors or power supplies equipped with low-voltage power connectors.

For more information, see: http://www.serialata.org/

26

Product Description

For information about

Refer to

The location of the Serial ATA IDE connectors on the D925XCV board

Figure 21, page 68

 

 

The location of the Serial ATA IDE connectors on the D925XBC board

Figure 22, page 70

 

 

1.7.2.3Serial ATA RAID

The ICH6-R supports RAID (Redundant Array of Independent Drives) level 0 and RAID level 1 on the Serial ATA ports as follows:

RAID 0 supports data striping. Two physical drives, of identical size, can be teamed together to create one logical drive. As data is written or retrieved from the logical drive, both drives operate in parallel, thus increasing the throughput.

RAID 1 supports data mirroring. Two physical drives, of identical size, maintain duplicate sets of all data on separate disk drives. Level 1 provides the highest data reliability because two complete copies of all information are maintained.

1.7.2.4RAID Boot Configuration Overview

A RAID array can be created by using the existing Serial ATA ports, correctly configuring the BIOS, and installing drivers. The following steps are required to successfully establish a RAID configuration.

1.Enable RAID Support in BIOS.

2.Create a RAID array using the Intel Application Accelerator (IAA) utility.

3.Install the IAA RAID driver.

4.Format the RAID array.

5.Install the IAA Companion Utility (this step is optional).

For information about

Refer to

Serial ATA RAID configuration

http://developer.intel.com/design/motherbd/cv/index.htm

 

 

1.7.2.5SCSI Hard Drive Activity LED Connector (Optional)

The SCSI hard drive activity LED connector is a 1 x 2-pin connector that allows an add-in

hard drive controller to use the same LED as the onboard IDE controller. For proper operation, this connector should be wired to the LED output of the add-in hard drive controller. The LED indicates when data is being read from, or written to, either the add-in hard drive controller or the onboard IDE controller (Parallel ATA or Serial ATA).

NOTE

The SCSI Hard Drive Activity LED connector is an option available only on the D925XCV board. It is not available on the D925XBC board.

For information about

Refer to

The location of the SCSI hard drive activity LED connector on the

Figure 21, page 68

D925XCV board

 

 

 

The signal names of the SCSI hard drive activity LED connector

Table 26, page 73

 

 

27

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

1.7.3Real-Time Clock, CMOS SRAM, and Battery

A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When the computer is not plugged into a wall socket, the battery has an estimated life of three years. When the computer is plugged in, the standby current from the power supply extends the life of the battery. The clock is accurate to ± 13 minutes/year at 25 ºC with 3.3 VSB applied.

NOTE

If the battery and AC power fail, custom defaults, if previously saved, will be loaded into CMOS RAM at power-on.

1.8 PCI Express Connectors

The boards provide the following PCI Express connectors:

One PCI Express x16 connector. The x16 interface supports simultaneous (full duplex) transfer speeds up to 8 GBytes/sec. Single-ended (half duplex) transfers are supported at up to

4 Gbytes/sec.

Four PCI Express x1 connectors on the D925XCV board; two PCI Express x1 connectors on the D925XBC board. The x1 interfaces support simultaneous transfer speeds up to

500 MBytes/sec

The PCI Express interface supports the PCI Conventional bus configuration mechanism so that the underlying PCI Express architecture is compatible with PCI Conventional compliant operating systems. Additional features of the PCI Express interface includes the following:

Support for the PCI Express enhanced configuration mechanism

Automatic discovery, link training, and initialization

Support for Active State Power Management (ASPM)

SMBus 2.0 support

Wake# signal supporting wake events from ACPI S1, S3, S4, or S5

Software compatible with the PCI Power Management Event (PME) mechanism defined in the PCI Power Management Specification Rev. 1.1

1.9Auxiliary Power (AUX PWR) Output Connector

The D925XCV board includes a 1x4 power connector that can be used to provide power for internal chassis lighting or additional fans. The use of this connector requires an ATX12V power supply with a 24-pin (2x12) main power cable. If a power supply with a 20-pin (2x10) main power cable is used, the auxiliary power output connector may not function.

The on/off function of this connector is controlled from within the BIOS Setup Program. The default setting in the BIOS is for this connector to be off.

28

Product Description

INTEGRATOR’S NOTES

When using this connector, observe the following precautions:

Do not use a Y-adapter, power splitter, or SATA power adapter to attach storage devices (such as hard disk drives or CD/DVD drives) to this connector. This connector will not provide adequate power for storage devices.

Do not connect any devices to this connector that draw more than 1.5 A. The connector circuitry includes overcurrent protection components that limit the current draw to a maximum of 1.5 A.

For information about

Refer to

The location of the auxiliary power output connector

Figure 21, page 68

 

 

The signal names of the auxiliary power output connector

Table 28, page 73

 

 

NOTE

The auxiliary power output connector is present only on the D925XCV board. It is not present on the D925XBC board.

1.10 I/O Controller

The I/O controller provides the following features:

One serial port

One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port (EPP) support

Serial IRQ interface compatible with serialized IRQ support for PCI Conventional bus systems

PS/2-style mouse and keyboard interfaces

Interface for one 1.44 MB or 2.88 MB diskette drive

Intelligent power management, including a programmable wake-up event interface

PCI Conventional bus power management support

The BIOS Setup program provides configuration options for the I/O controller.

1.10.1Serial Port

The boards have one serial port connector located on the back panel. The serial port supports data transfers at speeds up to 115.2 kbits/sec with BIOS support.

For information about

Refer to

The location of the serial port A connector

Figure 20, page 66

 

 

1.10.2Parallel Port

The 25-pin D-Sub parallel port connector is located on the back panel. Use the BIOS Setup program to set the parallel port mode.

29

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

For information about

Refer to

The location of the parallel port connector

Figure 20, page 66

 

 

1.10.3Diskette Drive Controller

The I/O controller supports one diskette drive. Use the BIOS Setup program to configure the diskette drive interface.

For information about

Refer to

The location of the diskette drive connector on the D925XCV board

Figure 21, page 68

 

 

The location of the diskette drive connector on the D925XBC board

Figure 22, page 70

 

 

1.10.4Keyboard and Mouse Interface

PS/2 keyboard and mouse connectors are located on the back panel.

NOTE

The keyboard is supported in the bottom PS/2 connector and the mouse is supported in the top PS/2 connector. Power to the computer should be turned off before a keyboard or mouse is connected or disconnected.

For information about

Refer to

The location of the keyboard and mouse connectors

Figure 20, page 66

 

 

30

Product Description

1.11 Audio Subsystem

The boards support the Intel High Definition audio subsystem based on the Realtek ALC880 or the Realtek ALC860 audio codec. The audio subsystem supports the following features:

Advanced jack sense (front and rear panel) that enables the audio codec to recognize the device that is connected to an audio port. All jacks are capable of retasking according to user’s definition, or can be automatically switched depending on the recognized device type.

Stereo input and output for all jacks

Multi-streaming capabilities that enable different audio streams to be sent to different audio devices. Multi-streaming also allows one audio stream to be directed out the back panel while another audio stream can be directed out the front panel.

A signal-to-noise (S/N) ratio of 90 dB

INTEGRATOR’S NOTE

For the front panel jack sensing and automatic retasking feature to function, a front panel daughter card that is designed for Intel High Definition Audio must be used. Otherwise, an AC ’97 style audio front panel connector will be assumed and the Line Out and Mic In functions will be permanent.

1.11.1Audio Subsystem Software

Audio software and drivers are available from Intel’s World Wide Web site.

For information about

Refer to

Obtaining audio software and drivers

Section 1.4, page 19

 

 

1.11.2Audio Connectors

The boards contain audio connectors on both the back panel and the component side of the board. The component-side audio connectors include the following:

Front panel audio (a 2 x 5-pin connector that provides mic in and line out signals for front panel audio connectors)

ATAPI CD-ROM (a 1 x 4-pin ATAPI-style connector for connecting an internal ATAPI CD-ROM drive to the audio mixer)

The functions of the back panel audio connectors are dependent on which subsystem is present. The 8-channel (7.1) audio subsystem is described in Section 1.11.3; the 6-channel (5.1) audio subsystem is described in Section 1.11.4.

For information about

Refer to

The locations of the front panel audio connector and the ATAPI CD-ROM

Figure 21, page 68

connector on the Desktop Board D925XCV

 

 

 

The locations of the front panel audio connector and the ATAPI CD-ROM

Figure 22, page 70

connector on the Desktop Board D925XBC

 

 

 

The signal names of the front panel audio connector

Table 22, page 72

 

 

The signal names of the ATAPI CD-ROM connector

Table 21, page 72

 

 

The back panel audio connectors

Section 2.8.1, page 63

31

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

1.11.38-Channel (7.1) Audio Subsystem

The 8-channel (7.1) audio subsystem includes the following:

Intel 82801FR I/O Controller Hub (ICH6-R)

Realtek ALC880 audio codec

Microphone input that supports a single dynamic, condenser, or electret microphone

The front and back panel audio connectors are configurable through the audio device drivers. The available configurable audio ports are shown in Figure 10.

Front Panel

Audio Connectors

Line Out/

Retasking Jack F

[Port 2]

Mic In/

Retasking Jack A or E [Port 1]

Back Panel

Audio Connectors

Surround Left and Right/

Retasking Jack H

[Black] Line In/Retasking Jack C

[Blue]

Center channel and LFE (Subwoofer)/

Line Out/Retasking Jack D

Retasking Jack G

[Orange]

[Lime Green]

 

Mic In/Retasking Jack B

 

[Pink]

S/PDIF Digital Audio Out

S/PDIF Digital Audio Out

Coaxial

Optical

 

OM16993

Figure 10. Front/Back Panel Audio Connector Options for 8-Channel (7.1) Audio Subsystem

32

Product Description

Figure 11 is a block diagram of the 8-channel (7.1) audio subsystem.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mic In/Retasking Jack B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Line In/Retasking Jack C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Line Out/Retasking Jack D

 

 

 

 

 

 

82801FR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Front Panel Retasking Jack A/E [Port 1]

 

 

 

 

Intel

 

 

 

 

 

 

 

 

 

 

 

 

 

I/O Controller

 

 

 

 

Realtek

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

High Definition

 

 

 

 

 

 

Front Panel Retasking Jack F [Port 2]

 

 

 

 

Hub

 

 

 

 

ALC880

 

 

 

 

 

 

 

 

 

 

Audio Link

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(ICH6-R)

 

 

 

 

Audio Codec

 

 

 

 

 

Center and LFE/Retasking Jack G

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Surround Left-Right/Retasking Jack H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CD-ROM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S/PDIF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OM16994

Figure 11. 8-channel (7.1) Audio Subsystem Block Diagram

For information about

Refer to

The back panel audio connectors

Section 2.8.1, page 63

33

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

1.11.46-Channel (5.1) Audio Subsystem

The 6-channel (5.1) audio subsystem includes the following:

Intel 82801FB I/O Controller Hub (ICH6)

Realtek ALC860 audio codec

Microphone input that supports a single dynamic, condenser, or electret microphone

The front and back panel audio connectors are configurable through the audio device drivers. The available configurable audio ports are shown in Figure 12.

Front Panel

 

Back Panel

Audio Connectors

 

Audio Connectors

Line Out/

Mic In/

 

Retasking Jack F

Retasking Jack E

Line In/

[Port 2]

[Port 1]

Retasking Jack C

 

 

Line Out/

 

 

Retasking Jack D

 

 

Mic In/

 

 

Retasking Jack B

 

 

OM16989

Figure 12. Front/Back Panel Audio Connector Options for 6-Channel (5.1) Audio Subsystem

Figure 13 is a block diagram of the 6-channel (5.1) audio subsystem.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mic In/Retasking Jack B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

82801FR

 

 

 

 

 

 

 

 

 

 

 

 

Line In/Retasking Jack C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Intel

 

 

ALC860

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Line Out/Retasking Jack D

 

 

 

 

 

 

 

 

I/O Controller

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hub

 

 

 

High Definition

 

 

Audio Codec

 

 

 

Front Panel Mic In/Retasking Jack E [Port 1]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(ICH6-R)

 

 

 

Audio Link

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Front Panel Line Out/Retasking Jack F [Port 2]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CD-ROM (optional)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OM17128

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 13. 6-Channel (5.1) Audio Subsystem Block Diagram

 

 

For information about

 

 

 

 

 

 

 

 

 

 

Refer to

 

 

The back panel audio connectors

 

 

 

 

 

 

 

 

 

 

Section 2.8.1, page 63

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

34

Product Description

1.12 LAN Subsystem

The LAN subsystem includes the Marvell Yukon 88E50 Gigabit (10/100/1000 Mbits/sec) Ethernet Controller and an RJ-45 LAN connector with integrated status LEDs.

1.12.1Marvell Yukon 88E8050 PCI Express 1.0a Integrated MAC/PHY

Gigabit Ethernet Controller

The Marvell Yukon 88E8050 provides the following functions:

x1 PCI Express link

Basic 10/100/1000 Ethernet LAN connectivity

IEEE 802.1p and 802.1q support

10/100/1000 IEEE 802.3 compliant

Compliant to 802.3x flow control support

Jumbo frame support

TCP, IP, UDP checksum offload

Automatic MDI/MDIX crossover

Full device driver compatibility

Configuration EEPROMs that contain the MAC address and ASF 2.0 support

Wake On LAN technology power management support

PCI Express Active State Power Management Support (L0s)

ASF 2.0 support

1.12.2RJ-45 LAN Connector with Integrated LEDs

Two LEDs are built into the RJ-45 LAN connector (as shown in Figure 14). Table 7 describes the LED states when the board is powered up and the Gigabit LAN subsystem is operating.

Green LED

Green/Yellow LED

OM16513

Figure 14. LAN Connector LED Locations

Table 7.

LAN Connector LED States

 

 

 

 

 

LED

Color

LED State

Condition

 

 

 

 

 

 

Off

LAN link is not established.

Left

Green

 

 

On

LAN link is established.

 

 

 

 

 

 

Blinking

LAN activity is occurring.

 

 

 

 

 

 

 

 

 

N/A

Off

10 Mbits/sec data rate is selected.

 

 

 

 

Right

Green

On

100 Mbits/sec data rate is selected.

 

 

 

 

 

Yellow

On

1000 Mbits/sec data rate is selected.

 

 

 

 

35

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

1.12.3Alert Standard Format (ASF) Support

The boards provide the following ASF support for the onboard 10/100/1000 LAN subsystem, PCI Express x1 bus add-in LAN cards, and PCI Conventional bus add-in LAN cards installed in PCI Conventional bus slot 2:

Monitoring of system firmware progress events, including:

BIOS present

Primary processor initialization

Memory initialization

Video initialization

PCI resource configuration

Hard-disk initialization

User authentication

Starting operating system boot process

Monitoring of system firmware error events, including:

Memory missing

Memory failure

No video device

Keyboard failure

Hard-disk failure

No boot media

Boot options to boot from different types of boot devices

Reset, shutdown, power cycle, and power up options

1.12.4LAN Subsystem Software

LAN software and drivers are available from Intel’s World Wide Web site.

For information about

Refer to

Obtaining LAN software and drivers

Section 1.4, page 19

 

 

36

Product Description

1.13 Hardware Management Subsystem

The hardware management features enable the Desktop Boards to be compatible with the Wired for Management (WfM) specification. The Desktop Board has several hardware management features, including the following:

Fan monitoring and control (through the hardware monitoring and fan control ASIC)

Thermal and voltage monitoring

Chassis intrusion detection

1.13.1Hardware Monitoring and Fan Control ASIC

The features of the hardware monitoring and fan control ASIC include:

Internal ambient temperature sensor

Two remote thermal diode sensors for direct monitoring of processor temperature and ambient temperature sensing

Power supply monitoring of five voltages (+5 V, +12 V, +3.3 VSB, +1.5 V, and +VCCP) to detect levels above or below acceptable values

Thermally monitored closed-loop fan control, for all three fans, that can adjust the fan speed or switch the fans on or off as needed

SMBus interface

For information about

Refer to

The location of the fan connectors and sensors for thermal monitoring for

Figure 15, page 38

the D925XCV board

 

 

 

The location of the fan connectors and sensors for thermal monitoring for

Figure 16, page 39

the D925XBC board

 

 

 

37

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

1.13.2Thermal Monitoring

Figure 15 shows the location of the sensors and fan connectors on the D925XCV board.

G

4

 

 

1

 

A

 

 

 

 

 

 

 

3

 

 

 

1

 

 

 

 

B

 

 

4

C

 

 

D

 

 

1

 

 

 

 

1

 

 

 

 

3

 

 

F

E

 

 

 

 

OM16679

Item

Description

 

 

ARemote ambient temperature sensor

BThermal diode, located on processor die

CAmbient temperature sensor, internal to hardware monitoring and fan control ASIC

DProcessor fan connector

ERear chassis fan connector

FFront chassis fan connector

GAuxiliary rear fan connector

Figure 15. Thermal Monitoring for D925XCV Board

38

Product Description

Figure 16 shows the location of the sensors and fan connectors on the D925XBC board.

 

 

 

A

 

 

3

 

 

 

1

 

 

 

 

B

 

 

4

C

 

 

D

 

 

1

 

 

 

 

1

 

 

 

 

3

 

 

F

E

 

 

 

 

OM16689

Item

Description

 

 

ARemote ambient temperature sensor

BThermal diode, located on processor die

CAmbient temperature sensor, internal to hardware monitoring and fan control ASIC

DProcessor fan

ERear chassis fan

FFront chassis fan

Figure 16. Thermal Monitoring for D925XBC Board

39

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

1.13.3Fan Monitoring

Fan monitoring can be implemented using Intel Desktop Utilities, LANDesk* software, or thirdparty software. The level of monitoring and control is dependent on the hardware monitoring ASIC used with the Desktop Board.

For information about

Refer to

 

 

The functions of the fan connectors

Section 1.14.2.2, page 44

 

 

1.13.4Chassis Intrusion and Detection

The Desktop Boards D925XCV and D925XBC support a chassis security feature that detects if the chassis cover is removed. The security feature uses a mechanical switch on the chassis that attaches to the chassis intrusion connector. When the chassis cover is removed, the mechanical switch is in the closed position.

1.14 Power Management

Power management is implemented at several levels, including:

Software support through Advanced Configuration and Power Interface (ACPI)

Hardware support:

Power connector

Fan connectors

LAN wake capabilities

Instantly Available PC technology

Resume on Ring

Wake from USB

Wake from PS/2 devices

Power Management Event signal (PME#) wake-up support

PCI Express WAKE# signal support

1.14.1ACPI

ACPI gives the operating system direct control over the power management and Plug and Play functions of a computer. The use of ACPI with the Desktop Boards D925XCV and D925XBC requires an operating system that provides full ACPI support. ACPI features include:

Plug and Play (including bus and device enumeration)

Power management control of individual devices, add-in boards (some add-in boards may require an ACPI-aware driver), video displays, and hard disk drives

Methods for achieving less than 15-watt system operation in the power-on/standby sleeping state

A Soft-off feature that enables the operating system to power-off the computer

Support for multiple wake-up events (see Table 10 on page 43)

Support for a front panel power and sleep mode switch

Table 8 lists the system states based on how long the power switch is pressed, depending on how ACPI is configured with an ACPI-aware operating system.

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Product Description

Table 8.

Effects of Pressing the Power Switch

 

 

 

 

 

 

 

…and the power switch is

 

If the system is in this state…

pressed for

…the system enters this state

 

 

 

 

Off

 

Less than four seconds

Power-on

(ACPI G2/G5 – Soft off)

 

(ACPI G0 – working state)

 

 

 

 

On

 

Less than four seconds

Soft-off/Standby

(ACPI G0 – working state)

 

(ACPI G1 – sleeping state)

On

 

More than four seconds

Fail safe power-off

(ACPI G0 – working state)

 

(ACPI G2/G5 – Soft off)

Sleep

 

Less than four seconds

Wake-up

(ACPI G1 – sleeping state)

 

(ACPI G0 – working state)

 

 

 

 

Sleep

 

More than four seconds

Power-off

(ACPI G1 – sleeping state)

 

(ACPI G2/G5 – Soft off)

 

 

 

 

1.14.1.1System States and Power States

Under ACPI, the operating system directs all system and device power state transitions. The operating system puts devices in and out of low-power states based on user preferences and knowledge of how devices are being used by applications. Devices that are not being used can be turned off. The operating system uses information from applications and user settings to put the system as a whole into a low-power state.

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Intel Desktop Board D925XCV/D925XBC Technical Product Specification

Table 9 lists the power states supported by the Desktop Boards D925XCV and D925XBC along with the associated system power targets. See the ACPI specification for a complete description of the various system and power states.

Table 9. Power States and Targeted System Power

 

 

Processor

 

Targeted System

Global States

Sleeping States

States

Device States

Power (Note 1)

G0 – working

S0 – working

C0 – working

D0 – working

Full power > 30 W

state

 

 

state.

 

 

 

 

 

 

G1 – sleeping

S1 – Processor

C1 – stop

D1, D2, D3 –

5 W < power < 52.5 W

state

stopped

grant

device

 

 

 

 

specification

 

 

 

 

specific.

 

 

 

 

 

 

G1 – sleeping

S3 – Suspend to

No power

D3 – no power

Power < 5 W (Note 2)

state

RAM. Context

 

except for

 

 

saved to RAM.

 

wake-up logic.

 

 

 

 

 

 

G1 – sleeping

S4 – Suspend to

No power

D3 – no power

Power < 5 W (Note 2)

state

disk. Context

 

except for

 

 

saved to disk.

 

wake-up logic.

 

 

 

 

 

 

G2/S5

S5 – Soft off.

No power

D3 – no power

Power < 5 W (Note 2)

 

Context not saved.

 

except for

 

 

Cold boot is

 

wake-up logic.

 

 

required.

 

 

 

 

 

 

 

 

G3 –

No power to the

No power

D3 – no power for

No power to the system.

mechanical off

system.

 

wake-up logic,

Service can be performed

AC power is

 

 

except when

safely.

 

 

provided by

 

disconnected

 

 

 

 

 

battery or external

 

from the

 

 

 

 

 

source.

 

computer.

 

 

 

 

 

 

 

 

 

 

 

 

Notes:

1.Total system power is dependent on the system configuration, including add-in boards and peripherals powered by the system chassis’ power supply.

2.Dependent on the standby power consumption of wake-up devices used in the system.

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Product Description

1.14.1.2Wake-up Devices and Events

Table 10 lists the devices or specific events that can wake the computer from specific states.

Table 10. Wake-up Devices and Events

These devices/events can wake up the computer…

…from this state

 

 

LAN

S1, S3, S4, S5 (Note)

Modem (back panel Serial Port A)

S1, S3

 

 

PME# signal

S1, S3, S4, S5 (Note)

Power switch

S1, S3, S4, S5

 

 

PS/2 devices

S1, S3

 

 

RTC alarm

S1, S3, S4, S5

 

 

USB

S1, S3

 

 

WAKE#

S1, S3, S4, S5

 

 

Note:

For LAN and PME# signal, S5 is disabled by default in the BIOS Setup program. Setting this option to Power On

 

will enable a wake-up event from LAN in the S5 state.

NOTE

The use of these wake-up events from an ACPI state requires an operating system that provides full ACPI support. In addition, software, drivers, and peripherals must fully support ACPI wake events.

1.14.2Hardware Support

CAUTION

Ensure that the power supply provides adequate +5 V standby current if LAN wake capabilities and Instantly Available PC technology features are used. Failure to do so can damage the power supply. The total amount of standby current required depends on the wake devices supported and manufacturing options.

The Desktop Boards D925XCV and D925XBC provide several power management hardware features, including:

Power connector

Fan connectors

LAN wake capabilities

Instantly Available PC technology

Resume on Ring

Wake from USB

Wake from PS/2 keyboard

PME# signal wake-up support

WAKE# signal wake-up support

LAN wake capabilities and Instantly Available PC technology require power from the +5 V standby line.

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Intel Desktop Board D925XCV/D925XBC Technical Product Specification

Resume on Ring enables telephony devices to access the computer when it is in a power-managed state. The method used depends on the type of telephony device (external or internal).

NOTE

The use of Resume on Ring and Wake from USB technologies from an ACPI state requires an operating system that provides full ACPI support.

1.14.2.1Power Connector

ATX12V-compliant power supplies can turn off the system power through system control. When an ACPI-enabled system receives the correct command, the power supply removes all non-standby voltages.

When resuming from an AC power failure, the computer returns to the power state it was in before power was interrupted (on or off). The computer’s response can be set using the Last Power State feature in the BIOS Setup program’s Boot menu.

For information about

Refer to

The location of the power connector

Figure 21, page 68

 

 

The signal names of the power connector

Table 29, page 75

 

 

1.14.2.2Fan Connectors

The function/operation of the fan connectors is as follows:

The fans are on when the board is in the S0 or S1 state.

The fans are off when the board is off or in the S3, S4, or S5 state.

Each fan connector is wired to a fan tachometer input of the hardware monitoring and fan control ASIC

All fan connectors support closed-loop fan control that can adjust the fan speed or switch the fan on or off as needed.

All fan connectors have a +12 V DC connection

For information about

Refer to

The location of the fan connectors

Figure 21, page 68

 

 

The location of the fan connectors and sensors for thermal monitoring

Figure 15, page 38

 

 

The signal names of the fan connectors

Section 2.8.1.1, page 64

 

 

1.14.2.3LAN Wake Capabilities

CAUTION

For LAN wake capabilities, the +5 V standby line for the power supply must be capable of providing adequate +5 V standby current. Failure to provide adequate standby current when implementing LAN wake capabilities can damage the power supply.

LAN wake capabilities enable remote wake-up of the computer through a network. The LAN network adapter monitors network traffic at the Media Independent Interface. Upon detecting a Magic Packet* frame, the LAN subsystem asserts a wake-up signal that powers up the computer.

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Product Description

Depending on the LAN implementation, the Desktop Boards D925XCV and D925XBC support LAN wake capabilities with ACPI in the following ways:

The PCI Express WAKE# signal

The PCI Conventional bus PME# signal for PCI 2.2 compliant LAN designs

The onboard LAN subsystem

1.14.2.4Instantly Available PC Technology

CAUTION

For Instantly Available PC technology, the +5 V standby line for the power supply must be capable of providing adequate +5 V standby current. Failure to provide adequate standby current when implementing Instantly Available PC technology can damage the power supply.

Instantly Available PC technology enables the Desktop Boards D925XCV and D925XBC to enter the ACPI S3 (Suspend-to-RAM) sleep-state. While in the S3 sleep-state, the computer will appear to be off (the power supply is off, and the front panel LED is amber if dual colored, or off if single colored.) When signaled by a wake-up device or event, the system quickly returns to its last known wake state. Table 10 on page 43 lists the devices and events that can wake the computer from the S3 state.

The Desktop Boards D925XCV and D925XBC support the PCI Bus Power Management Interface Specification. Add-in boards that also support this specification can participate in power management and can be used to wake the computer.

The use of Instantly Available PC technology requires operating system support and PCI 2.2 compliant add-in cards, PCI Express add-in cards, and drivers.

1.14.2.5Resume on Ring

The operation of Resume on Ring can be summarized as follows:

Resumes operation from ACPI S1 or S3 states

Detects incoming call similarly for external and internal modems

Requires modem interrupt be unmasked for correct operation

1.14.2.6Wake from USB

USB bus activity wakes the computer from ACPI S1 or S3 states.

NOTE

Wake from USB requires the use of a USB peripheral that supports Wake from USB.

1.14.2.7Wake from PS/2 Devices

PS/2 device activity wakes the computer from an ACPI S1 or S3 state.

1.14.2.8PME# Signal Wake-up Support

When the PME# signal on the PCI Conventional bus is asserted, the computer wakes from an ACPI S1, S3, S4, or S5 state (with Wake on PME enabled in BIOS).

45

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

1.14.2.9WAKE# Signal Wake-up Support

When the WAKE# signal on the PCI Express bus is asserted, the computer wakes from an ACPI S1, S3, S4, or S5 state.

1.14.2.10+5 V Standby Power Indicator LED

The +5 V standby power indicator LED shows that power is still present even when the computer appears to be off. Figure 17 shows the location of the standby power indicator LED on the D925XCV board.

CAUTION

If AC power has been switched off and the standby power indicator is still lit, disconnect the power cord before installing or removing any devices connected to the board. Failure to do so could damage the board and any attached devices.

CR3J1

OM16678

Figure 17. Location of the Standby Power Indicator LED on the D925XCV Board

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Product Description

1.15 Trusted Platform Module (Optional)

The optional Trusted Platform Module (TPM) is a component on the desktop board that is specifically designed to enhance platform security above-and-beyond the capabilities of today’s software by providing a protected space for key operations and other security critical tasks. Using both hardware and software, the TPM protects encryption and signature keys at their most vulnerable stages—operations when the keys are being used unencrypted in plain-text form. The TPM is specifically designed to shield unencrypted keys and platform authentication information from software-based attacks.

1.15.1 System Requirements

Intel Desktop Board D925XCV or D925XBC

Microsoft Windows* 2000 Professional (SP4) or Microsoft Windows XP Professional (SP1)

NTFS file system required

Microsoft Internet Explorer* 5.5 or later

Adobe* Acrobat* 5.0 or later

1.15.2 Warning of Potential Data Loss

CAUTION

Failure to follow the instructions below may cause you to lose data. Read and follow these instructions prior to Trusted Platform Module initialization.

System integrators, owners, and end users must take precautions to mitigate the chance of data loss. Data encrypted by any program utilizing the Trusted Platform Module (TPM) may become inaccessible or unrecoverable if any of the following occurs:

Lost Password: Loss of any of the passwords associated with the TPM will render encrypted data inaccessible. No password recovery is available. Read the Security Precautions for Password Procedures.

Hard Drive Failure: In the event of a failure of a hard disk (or other storage media) that contains encrypted data, an image of the hard disk (or other storage media) must be restored from backup before access to encrypted data may become available. The owner/user should backup the system hard disk on a regular basis. Read the Security Precautions below for Hard Drive Backup Procedures.

Platform Failure: In the event of a platform failure and/or replacement of the motherboard, recovery procedures may allow migratable keys to be recovered and may restore access to encrypted data. All non-migratable keys and their associated data will be lost. Both the Infineon* Security Platform software and Wave Systems* EMBASSY* Trust Suite utilize migratable keys. Please check any other software that accesses the TPM for migratability.

Read the Security Precautions for Emergency Recovery File Back Up Procedures.

Loss of Trusted Platform Module Ownership: Trusted Platform Module Ownership/contents may be cleared (via a BIOS switch) to allow for the transfer of a system to a new owner. If TPM ownership is cleared, either intentionally or in error, recovery procedures may allow the migratable keys to be recovered and may restore access to encrypted data. Read the Security Precautions for Emergency Recovery File Back Up Procedures.

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Intel Desktop Board D925XCV/D925XBC Technical Product Specification

1.15.3Security Precautions

Security, like any other aspect of computer maintenance requires planning. What is unique about security has to do with understanding who "friends" and adversaries are. The TPM provides mechanisms to enable the owner/user to protect their information from adversaries. To provide this protection the TPM effectively puts "locks" around the data. Just like physical locks, if keys or combinations are lost, the assets (i.e., data) may be inaccessible not only to adversaries, but also to asset owner/user.

The TPM provides two classes of keys: migratable and non-migratable. Migratable keys are designed to protect data that can be used (i.e., unencrypted) on more than one platform. This has the advantage of allowing the key data to be replicated (backed-up and restored) to another platform. This may be because of user convenience (someone uses more than one platform, or the data needs to be available to more than one person operating on different platforms). This type of key also has the advantage in that it can be backed-up and restored from a defective platform onto a new platform. However, migratable keys may not be the appropriate level of protection (e.g., the user wants the data restricted to a single platform) needed for the application. This requires a nonmigratable key. Non-migratable keys carry with them a usage deficit in that while the key may be backed-up and restored (i.e., protected from hard disk failure) they are not protected against system or TPM failure. The very nature of a non-migratable key is that they can be used on one and only one TPM. In the event of a system or TPM failure, all non-migratable keys and the data associated with them will be inaccessible and unrecoverable.

CAUTION

The following precautions and procedures may assist in recovering from any of the previously listed situations. Failure to implement these security precautions and procedures may result in unrecoverable data loss.

1.15.3.1Password Procedures

The Infineon Security Platform software allows users to configure passwords from 6 to 255 characters. A good password should consist of:

At least one upper case letter (A to Z)

At least one numerical character (0 to 9)

At least one symbol character (!, @, &, etc.)

Example Passwords: “I wear a Brown hat 2 worK @ least once-a-month” or “uJGFak&%)adf35a9m”

NOTE

Avoid using names or dates that can be easily guessed such as: birthdays, anniversaries, family member names, pet names, etc.

All passwords associated with the Infineon Security Platform software (Owner, Emergency Recovery Token, and User passwords) and the Wave Systems EMBASSY Trust Suite are NOT RECOVERABLE and cannot be reset without the original text. The system owner should document all passwords, store them in a secured location (vault, safe deposit box, off-site storage, etc.), and have them available for future use. These documents should be updated after any password changes.

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Product Description

1.15.3.2Emergency Recovery File Back Up Procedures

The Emergency Recovery Token (SPEmRecToken.xml) must be saved or moved to a removable media (floppy, USB drive, CDR, flash media, etc). Once this is done, the removable media should be stored in a secure location. DO NOT LEAVE ANY COPIES of the Emergency Recovery Token on the hard drive or within any hard drive image backups. If a copy of the Emergency Recovery Token remains on the system, it could be used to compromise the Trusted Platform Module and platform.

After completing the Infineon Security Platform User Initialization Wizard, a copy of the Emergency Recovery Archive (SPEmRecArchive.xml) should be copied to a removable media and stored in a secure location. This procedure should be repeated after any password changes or the addition of a new user.

1.15.3.3Hard Drive Image Backup Procedures

To allow for emergency recovery from a hard drive failure, frequent images of the hard drive should be created and stored in a secure location. In the event of a hard drive failure, the latest image can be restored to a new hard drive and access to the encrypted data may be re-established.

NOTE

All encrypted and unencrypted data that was added after the last image was created will be lost.

1.15.3.4Clear Text Backup (Optional)

It is recommended that system owners follow the Hard Drive Image Backup Procedures. To backup select files without creating a drive image, files can be moved from secured programs or drive letters to an unencrypted directory. The unencrypted (clear text) files may then be backed up to a removable media and stored in a secure location. The advantage of the clear text backup is that no TPM key is required to restore the data. This option is not recommended because the data is exposed during backup and restore.

1.15.4Trusted Platform Module Ownership

The Trusted Platform Module is disabled by default when shipped and the owner/end customer of the system assumes “ownership” of the TPM. This permits the owner of the system to control initialization of the TPM and create all the passwords associated with the TPM that is used to protect their keys and data.

System builders/integrators may install both the Infineon Security Platform software and the Wave System EMBASSY Trust Suite, but SHOULD NOT attempt to use or activate the TPM or either software package.

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Intel Desktop Board D925XCV/D925XBC Technical Product Specification

1.15.5Enabling the Trusted Platform Module

The Trusted Platform Module is disabled by default when shipped to insure that the owner/end customer of the system initializes the TPM and configures all security passwords. The owner/end customer should use the following steps to enable the TPM.

1.While the PC is displaying the splash screen (or POST screen), press the <F2> key to enter BIOS.

2.Use the arrow keys to go to the Advanced Menu, select Peripheral Configuration, and then press the <Enter> key.

3.Select the Trusted Platform Module, press <Enter>, and select Enabled and press <Enter> again (display should show: Trusted Platform Module [Enabled]).

4.Press the <F10> key, select Ok and press <Enter>.

5.System should reboot and start Microsoft Windows.

1.15.6Assuming Trusted Platform Module Ownership

Once the TPM has been enabled, ownership must be assumed by using the Infineon Security Platform Software. The owner/end user should follow the steps listed below to take ownership of the TPM:

1.Start the system.

2.Launch the Infineon Security Platform Initialization Wizard.

3.Create Owner password (before creating any password, review the Password Recommendations made earlier in this document).

4.Create a new Recovery Archive (note the file name and location).

5.Specify a Security Platform Emergency Recovery Token password and location. (this password should not match the Owner password or any other password).

6.Define where to save the Emergency Recovery Token (note the file location and name).

7.The software will then create recovery archive files and finalize ownership of the TPM.

8.After completing the Infineon Security Platform Initialization Wizard, the Emergency Recovery Token (SPEmRecToken.xml) must be moved to a removable media (floppy, CDR, flash media, etc) if the file was not saved to a removable media during installation. Once this is done, the removable media should be stored in a secure location. No copies of this Emergency Recovery Token file should remain on the system. If a copy remains on the system, it could be used to compromise the security of the platform.

9.Launch the Infineon Security Platform User Initialization Wizard.

10.Create a Basic User password (this password is the most frequently used and should not match any other password).

11.Select and configure Security Platform features for this user.

12.After completing the Infineon Security Platform User Initialization Wizard, a copy of the Emergency Recovery Archive (SPEmRecArchive.xml) should be copied to a removable media and stored in a secure location. This procedure should be repeated after any password changes or the addition of new users.

13.Restart the system.

14.To backup the keys for the EMBASSY Trust Suite, the Key Transfer Manager software must be configured. Launch the Key Transfer Manager from the program menu.

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Product Description

15.Follow the instructions and create and document the locations for both the archive and restoration key files. The key archive should be located on a removable media and stored in a secure location when not in use.

16.Create and document the password to protect the key archive.

17.Provide the TPM Owner password to allow the Key Transfer Manager to create the archive and restoration key files.

18.Upon completing the configuration of the Key Transfer Manager, it will place an icon in the task bar and automatically back up all new and updated keys associated with the EMBASSY Trust Suite. If the removable media that contains the archive file is not present when a new key is generated, then keys will have to be manually backed up using the Key Transfer Manager when the removable media is available.

19.All passwords associated with the Infineon Security Platform Software (Owner, Emergency Recovery Token, and User passwords) and Wave Systems EMBASSY Trust Suite and Key Transfer Manager are not recoverable and cannot be reset without the original text. These passwords should be documented and stored in a secured location (vault, safe deposit box, offsite storage, etc.) in case they are needed in the future. These documents and files should be updated after any password changes.

1.15.7Recovery Procedures

1.15.7.1Recovering from Hard Disk Failure

Restore the latest hard drive image from backup to the new hard drive – no TPM specific recovery is necessary.

1.15.7.2Recovering from Desktop Board or TPM Failure

This procedure may restore the migratable keys from the Emergency Recovery Archive, and does not restore any previous keys or content to the TPM. This recovery procedure may restore access to the Infineon Security Platform software and Wave Systems EMBASSY Trust Suite that are secured with migratable keys.

Requirements:

Emergency Recovery Archive (created with the Infineon Security Platform Initiation Wizard)

Emergency Recovery Token (created with the Infineon Security Platform Initiation Wizard)

Emergency Recovery Token Security Password (created with the Infineon Security Platform Initiation Wizard)

Working original operating system (OS) installation, or a restored image of the hard drive

Wave Systems Key Transfer Manager archive password

TPM Ownership password

This recovery procedure only restores the migratable keys from the previously created Recovery Archives.

1.Replace the desktop board with the same model as the failed board.

2.Start the original operating system or restore the original hard drive image.

3.Start the Infineon Security Platform Initialization Wizard and check the “I want to restore the existing Security Platform” box.

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Intel Desktop Board D925XCV/D925XBC Technical Product Specification

4.Follow the instructions during the Security Platform Initialization, and append the Emergency Recovery Archive to the existing archive.

5.Provide all the necessary passwords, files, and file locations as requested. It may take up to 20 minutes for Security Platform Initialization Wizard to restore the security platform settings.

6.Start User Initialization Wizard. Select “Recover Your Basic User Key” when prompted. Specify the original Basic User Key password and proceed with the wizard.

7.When re-configuring the Personal Secure Drive, select “I want to change my Personal Secure Drive setting”, confirm the drive letter and name are correct, and then proceed through the rest of the wizard.

8.Restart the system when requested.

9.To restore access to the EMBASSY Trust Suite, right mouse click on the Key Transfer Manager icon located in the taskbar in the lower right corner of the screen, and select Restore TPM Keys.

10.Provide all the necessary passwords, files, and file locations as requested by the Key Transfer Manager.

11.Upon successful completion of all steps, you should be able to access previously encrypted files.

1.15.8Clearing Trusted Platform Module Ownership

WARNING

Disconnect the desktop board's power supply from its AC power source before you connect or disconnect cables, or install or remove any board components. Failure to do this can result in personal injury or equipment damage. Some circuitry on the desktop board can continue to operate even though the front panel power switch is off.

CAUTION

DATA ENCRYPTED BY ANY PROGRAM UTILIZING THE TPM WILL BECOME INACCESSIBLE IF TPM OWNERSHIP IS CLEARED. Recovery procedures may allow the migratable keys to be recovered and might restore access to encrypted data. (Review the Recovery Procedures for detailed instructions).

The TPM may be cleared to transfer ownership of the platform to a new owner.

1.Observe precautions in the above WARNING then open the system case.

2.Move the configuration jumper on the board to pins 2-3.

3.Restore power to the PC and power on.

4.System should automatically enter BIOS setup.

5.Use the arrow keys to select Clear Trusted Platform Module, press <Enter>.

6.If you agree to the warning message select Ok and press <Enter>.

7.Press the <F10> key to save and exit, select Ok and press <Enter>.

8.Power off the system.

9.Review precautions in the WARNING above.

10.Restore the configuration jumper on the board to pins 1-2.

When cleared, the TPM module is disabled by default.

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Product Description

1.15.9Software Support

For assistance with the Infineon Security Platform Software, visit the web at: http://www.infineon.com

For assistance with the Wave System EMBASSY Trust Suite, visit the web at: http://www.wave.com/support/ets.html

For additional information about TPM and enhancing PC security, visit: https://www.trustedcomputinggroup.org/home

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Intel Desktop Board D925XCV/D925XBC Technical Product Specification

54

2 Technical Reference

What This Chapter Contains

 

2.1

Introduction ..................................................................................................................

55

2.2

Memory Resources ......................................................................................................

55

2.3

DMA Channels .............................................................................................................

57

2.4

Fixed I/O Map...............................................................................................................

58

2.5

PCI Configuration Space Map......................................................................................

59

2.6

Interrupts ......................................................................................................................

60

2.7

PCI Conventional Interrupt Routing Map .....................................................................

61

2.8

Connectors...................................................................................................................

63

2.9

Jumper Block ...............................................................................................................

80

2.10

Mechanical Considerations ..........................................................................................

81

2.11

Electrical Considerations..............................................................................................

85

2.12

Thermal Considerations ...............................................................................................

87

2.13

Reliability......................................................................................................................

89

2.14

Environmental ..............................................................................................................

90

2.1 Introduction

Sections 2.2 - 2.6 contain several standalone tables. Table 11 describes the system memory map, Table 12 lists the DMA channels, Table 13 shows the I/O map, Table 14 defines the PCI Conventional bus configuration space map, and Table 15 describes the interrupts. The remaining sections in this chapter are introduced by text found with their respective section headings.

2.2 Memory Resources

2.2.1Addressable Memory

The board utilizes 4 GB of addressable system memory. Typically the address space that is allocated for PCI Conventional bus add-in cards, PCI Express configuration space, BIOS (firmware hub), and chipset overhead resides above the top of DRAM (total system memory). On a system that has 4 GB of system memory installed, it is not possible to use all of the installed memory due to system address space being allocated for other system critical functions. These functions include the following:

BIOS/firmware hub (2 MB)

Local APIC (19 MB)

Digital Media Interface (40 MB)

Front side bus interrupts (17 MB)

PCI Express configuration space (256 MB)

MCH base address registers, internal graphics ranges, PCI Express ports (up to 512 MB)

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Intel Desktop Board D925XCV/D925XBC Technical Product Specification

Memory-mapped I/O that is dynamically allocated for PCI Conventional and PCI Express addin cards

The amount of installed memory that can be used will vary based on add-in cards and BIOS settings. Figure 18 shows a schematic of the system memory map. All installed system memory can be used when there is no overlap of system addresses.

4 GB

Top of System Address Space

FLASH

APIC

~20 MB

Reserved

PCI Memory Range - contains PCI, chipsets, Direct Media Interface (DMI), and ICH ranges (approximately 750 MB)

Top of usable DRAM (memory visible to the operating system)

DRAM

Range

1 MB

640 KB

DOS

Compatibility

Memory

0 MB

0FFFFFH

Upper BIOS

 

0F0000H

area (64 KB)

 

0EFFFFH

 

Lower BIOS

 

area

 

(64 KB;

0E0000H

16 KB x 4)

0DFFFFH

 

Add-in Card

 

BIOS and

 

Buffer area

 

(128 KB;

0C0000H

16 KB x 8)

 

0BFFFFH

Standard PCI/

 

ISA Video

 

Memory (SMM

 

Memory)

0A0000H

128 KB

09FFFFH

DOS area

 

00000H

(640 KB)

 

1 MB

960 KB

896 KB

768 KB

640 KB

0 KB

OM17140

Figure 18. Detailed System Memory Address Map

56

Technical Reference

2.2.2Memory Map

Table 11 lists the system memory map.

Table 11. System Memory Map

Address Range (decimal)

Address Range (hex)

Size

Description

 

 

 

 

1024 K - 4194304 K

100000 - FFFFFFFF

4095 MB

Extended memory

 

 

 

 

960 K - 1024 K

F0000 - FFFFF

64 KB

Runtime BIOS

 

 

 

 

896 K - 960 K

E0000 - EFFFF

64 KB

Reserved

 

 

 

 

800 K - 896 K

C8000 - DFFFF

96 KB

Potential available high DOS

 

 

 

memory (open to the PCI

 

 

 

Conventional bus). Dependent on

 

 

 

video adapter used.

 

 

 

 

640 K - 800 K

A0000 - C7FFF

160 KB

Video memory and BIOS

 

 

 

 

639 K - 640 K

9FC00 - 9FFFF

1 KB

Extended BIOS data (movable by

 

 

 

memory manager software)

 

 

 

 

512 K - 639 K

80000 - 9FBFF

127 KB

Extended conventional memory

 

 

 

 

0 K - 512 K

00000 - 7FFFF

512 KB

Conventional memory

 

 

 

 

2.3 DMA Channels

Table 12. DMA Channels

DMA Channel Number

Data Width

System Resource

 

 

 

0

8 or 16 bits

Open

 

 

 

1

8 or 16 bits

Parallel port

 

 

 

2

8 or 16 bits

Diskette drive

 

 

 

3

8 or 16 bits

Parallel port (for ECP or EPP)

 

 

 

4

8 or 16 bits

DMA controller

 

 

 

5

16 bits

Open

 

 

 

6

16 bits

Open

 

 

 

7

16 bits

Open

 

 

 

57

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

2.4 Fixed I/O Map

Table 13. I/O Map

Address (hex)

Size

Description

 

 

 

 

0000

- 00FF

256 bytes

Used by the Desktop Board D925XCV/D925XBC. Refer to

 

 

 

the ICH6-R data sheet for dynamic addressing information.

 

 

 

 

0170

- 0177

8 bytes

Secondary Parallel ATA IDE channel command block

 

 

 

01F0 - 01F7

8 bytes

Primary Parallel ATA IDE channel command block

 

 

 

0228 - 022F (Note 1)

8 bytes

LPT3

0278

- 027F (Note 1)

8 bytes

LPT2

02E8 - 02EF (Note 1)

8 bytes

COM4

02F8 - 02FF (Note 1)

8 bytes

COM2

0374

- 0377

4 bytes

Secondary Parallel ATA IDE channel control block

 

 

 

0377, bits 6:0

7 bits

Secondary IDE channel status port

 

 

 

 

0378

- 037F

8 bytes

LPT1

03E8 - 03EF

8 bytes

COM3

03F0 - 03F5

6 bytes

Diskette channel

03F4 – 03F7

1 byte

Primary Parallel ATA IDE channel control block

03F8 - 03FF

8 bytes

COM1

 

 

 

04D0 - 04D1

2 bytes

Edge/level triggered PIC

 

 

 

LPTn + 400

8 bytes

ECP port, LPTn base address + 400h

 

 

 

0CF8 - 0CFB (Note 2)

4 bytes

PCI Conventional bus configuration address register

0CF9 (Note 3)

1 byte

Reset control register

0CFC - 0CFF

4 bytes

PCI Conventional bus configuration data register

FFA0 - FFA7

8 bytes

Primary Parallel ATA IDE bus master registers

FFA8 - FFAF

8 bytes

Secondary Parallel ATA IDE bus master registers

Notes:

1.Default, but can be changed to another address range.

2.Dword access only.

3.Byte access only.

NOTE

Some additional I/O addresses are not available due to ICH6-R address aliasing. The ICH6-R data sheet provides more information on address aliasing.

For information about

Refer to

Obtaining the ICH6-R data sheet

Section 1.4 on page 19

 

 

58

Technical Reference

2.5 PCI Configuration Space Map

Table 14. PCI Configuration Space Map

Bus

Device

Function

 

Number (hex)

Number (hex)

Number (hex)

Description

 

 

 

 

00

00

00

Memory controller of Intel 82925X component

 

 

 

 

00

01

00

PCI Express x16 graphics port

 

 

 

 

00

1B

00

Intel High Definition Audio Controller

 

 

 

 

00

1C

00

PCI Express port 1 (PCI Express x1 bus connector 1)

 

 

 

 

00

1C

01

PCI Express port 2 (Gigabit Ethernet controller bridge)

 

 

 

 

00

1C

02

PCI Express port 3 (PCI Express x1 bus connector 2)

 

 

 

(Note 1)

 

 

 

 

00

1C

03

PCI Express port 4 (not used)

 

 

 

 

00

1D

00

USB UHCI controller 1

 

 

 

 

00

1D

01

USB UHCI controller 2

 

 

 

 

00

1D

02

USB UHCI controller 3

 

 

 

 

00

1D

03

USB UHCI controller 4

 

 

 

 

00

1D

07

EHCI controller

 

 

 

 

00

1E

00

PCI bridge

 

 

 

 

00

1F

00

PCI controller

 

 

 

 

00

1F

01

Parallel ATA IDE controller

 

 

 

 

00

1F

02

Serial ATA controller

 

 

 

 

00

1F

03

SMBus controller

 

 

 

 

(Note 2)

00

00

Gigabit Ethernet Controller

 

 

 

 

(Note 2)

00

00

PCI Conventional bus connector 1

 

 

 

 

(Note 2)

01

00

PCI Conventional bus connector 2

 

 

 

 

(Note 2)

02

00

PCI Conventional bus connector 3 (Note 1)

(Note 2)

03

00

PCI Conventional bus connector 4 (Note 1)

(Note 2)

05

00

IEEE-1394a controller

 

 

 

 

Notes:

1.Not present on the D925XBC.

2.Bus number is dynamic and can change based on add-in cards used.

59

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

2.6 Interrupts

The interrupts can be routed through either the Programmable Interrupt Controller (PIC) or the Advanced Programmable Interrupt Controller (APIC) portion of the ICH6-R component. The PIC is supported in Windows 98 SE and Windows ME and uses the first 16 interrupts. The APIC is supported in Windows 2000 and Windows XP and supports a total of 24 interrupts.

Table 15.

Interrupts

 

 

 

IRQ

 

System Resource

 

 

 

NMI

 

I/O channel check

 

 

 

0

 

Reserved, interval timer

 

 

 

1

 

Reserved, keyboard buffer full

 

 

 

2

 

Reserved, cascade interrupt from slave PIC

 

 

 

3

 

User available

 

 

 

4

 

COM1 (Note 1)

5

 

LPT2 (Plug and Play option)/User available

 

 

 

6

 

Diskette drive

 

 

 

7

 

LPT1 (Note 1)

8

 

Real-time clock

 

 

 

9

 

User available

 

 

 

10

 

User available

 

 

 

11

 

User available

 

 

 

12

 

Onboard mouse port (if present, else user available)

 

 

 

13

 

Reserved, math coprocessor

 

 

 

14

 

Primary IDE/Serial ATA (if present, else user available)

 

 

 

15

 

Serial ATA (if present, else user available)

 

 

 

16 (Note 2)

 

User available (through PIRQA)

17 (Note 2)

 

User available (through PIRQB)

18 (Note 2)

 

User available (through PIRQC)

19 (Note 2)

 

User available (through PIRQD)

20 (Note 2)

 

User available (through PIRQE)

21 (Note 2)

 

User available (through PIRQF)

22 (Note 2)

 

User available (through PIRQG)

23 (Note 2)

 

User available (through PIRQH)

Notes:

1.Default, but can be changed to another IRQ.

2.Available in APIC mode only.

60

Technical Reference

2.7 PCI Conventional Interrupt Routing Map

This section describes interrupt sharing and how the interrupt signals are connected between the PCI Conventional bus connectors and onboard PCI Conventional devices. The PCI Conventional specification describes how interrupts can be shared between devices attached to the PCI Conventional bus. In most cases, the small amount of latency added by interrupt sharing does not affect the operation or throughput of the devices. In some special cases where maximum performance is needed from a device, a PCI Conventional device should not share an interrupt with other PCI Conventional devices. Use the following information to avoid sharing an interrupt with a PCI Conventional add-in card.

PCI Conventional devices are categorized as follows to specify their interrupt grouping:

INTA: By default, all add-in cards that require only one interrupt are in this category. For almost all cards that require more than one interrupt, the first interrupt on the card is also classified as INTA.

INTB: Generally, the second interrupt on add-in cards that require two or more interrupts is classified as INTB. (This is not an absolute requirement.)

INTC and INTD: Generally, a third interrupt on add-in cards is classified as INTC and a fourth interrupt is classified as INTD.

The ICH6-R has eight Programmable Interrupt Request (PIRQ) input signals. All PCI Conventional interrupt sources either onboard or from a PCI Conventional add-in card connect to one of these PIRQ signals. Some PCI Conventional interrupt sources are electrically tied together on the board and therefore share the same interrupt. Table 16 shows an example of how the PIRQ signals are routed.

For example, using Table 16 as a reference, assume an add-in card using INTA is plugged into PCI Conventional bus connector 3. In PCI bus connector 3, INTA is connected to PIRQB, which is already connected to the ICH6-R audio controller. The add-in card in PCI Conventional bus connector 3 now shares an interrupt with the onboard interrupt source.

61

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

Table 16. PCI Interrupt Routing Map

 

 

 

ICH6-R PIRQ Signal Name

 

 

PCI Interrupt Source

 

 

 

 

 

 

 

 

PIRQA

PIRQB

PIRQC

PIRQD

PIRQE

PIRQF

PIRQG

PIRQH

 

 

 

 

 

 

 

 

 

IEEE-1394a controller

 

INTA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PCI bus connector 1

 

 

 

 

INTD

INTA

INTB

INTC

 

 

 

 

 

 

 

 

 

PCI bus connector 2

 

 

 

 

INTC

INTB

INTA

INTD

 

 

 

 

 

 

 

 

 

PCI bus connector 3 (Note)

INTD

INTC

INTA

INTB

 

 

 

 

PCI bus connector 4 (Note)

 

 

INTB

INTA

 

INTC

INTD

 

Note: Not present on the D925XBC.

NOTE

In PIC mode, the ICH6-R can connect each PIRQ line internally to one of the IRQ signals (3, 4, 5, 6, 7, 9, 10, 11, 12, 14, and 15). Typically, a device that does not share a PIRQ line will have a unique interrupt. However, in certain interrupt-constrained situations, it is possible for two or more of the PIRQ lines to be connected to the same IRQ signal. Refer to Table 15 for the allocation of PIRQ lines to IRQ signals in APIC mode.

PCI interrupt assignments to the USB ports, Serial ATA ports, and PCI Express ports are dynamic.

62

Technical Reference

2.8 Connectors

CAUTION

Only the following connectors have overcurrent protection: back panel USB, front panel USB, and PS/2.

The other internal connectors are not overcurrent protected and should connect only to devices inside the computer’s chassis, such as fans and internal peripherals. Do not use these connectors to power devices external to the computer’s chassis. A fault in the load presented by the external devices could cause damage to the computer, the power cable, and the external devices themselves.

This section describes the board’s connectors. The connectors can be divided into these groups:

Back panel I/O connectors

Component-side I/O connectors (see page 68)

NOTE

When installing the D925XBC board in a microATX chassis, make sure that peripheral devices are installed at least 1.5 inches above the main power connector, the diskette drive connector, the Parallel ATA IDE connector, and the DIMM sockets.

2.8.1Back Panel Connectors

The back panel configuration is dependent upon which audio subsystem is present. The configurations are as follows:

8-channel (7.1) audio subsystem (five analog audio output connectors and two digital audio output connectors), described on page 64

6-channel (5.1) audio subsystem (three analog audio output connectors), described on page 66

63

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

2.8.1.1Back Panel Connectors For 8-Channel (7.1) Audio Subsystem

Figure 19 shows the location of the back panel connectors for boards equipped with the 8-channel (7.1) audio subsystem. The back panel connectors are color-coded. The figure legend (Table 17) lists the colors used (when applicable).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A C

 

D

 

 

 

 

 

 

 

M

 

 

 

 

N

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B

E

F

G

I

K

L

O

 

 

 

 

 

 

 

OM16680

Figure 19. Back Panel Connectors for 8-Channel (7.1) Audio Subsystem

Table 17 lists the back panel connectors identified in Figure 19.

NOTE

The back panel audio line out connector is designed to power headphones or amplified speakers only. Poor audio quality occurs if passive (non-amplified) speakers are connected to this output.

64

Technical Reference

Table 17. Back Panel Connectors Shown in Figure 19.

Item/callout from

 

Figure 19

Description

 

 

A

PS/2 mouse port [Green]

 

 

B

PS/2 keyboard port [Purple]

 

 

C

Serial port A [Teal]

 

 

D

Parallel port [Burgundy]

 

 

E

Digital audio out coaxial [Orange]

 

 

F

Digital audio out optical

 

 

G

Front left/right channel audio out/Two channel audio line out/Retasking Jack D

 

[Lime green]

H

Surround left/right channel audio out/Retasking Jack H [Black]

 

 

I

Center channel and LFE (subwoofer) audio out/ Retasking Jack G

 

[Orange]

J

Audio line in/Retasking Jack C [Blue]

 

 

K

Mic in/Retasking Jack B [Pink]

 

 

L

USB ports (two)

 

 

M

IEEE-1394a connector (optional)

 

 

N

LAN

 

 

O

USB ports (two)

 

 

65

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

2.8.1.2Back Panel Connectors For 6-Channel (5.1) Audio Subsystem

Figure 20 shows the location of the back panel connectors for boards equipped with the 6-channel (5.1) audio subsystem. The back panel connectors are color-coded. The figure legend (Table 18) lists the colors used (when applicable).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A C

 

 

 

 

 

 

D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B F G H K

OM17127

Figure 20. Back Panel Connectors for 6-Channel (5.1) Audio Subsystem

Table 18 lists the back panel connectors identified in Figure 20.

NOTE

The back panel audio line out connector is designed to power headphones or amplified speakers only. Poor audio quality occurs if passive (non-amplified) speakers are connected to this output.

66

Technical Reference

Table 18. Back Panel Connectors Shown in Figure 20.

Item/callout from

 

Figure 20

Description

 

 

A

PS/2 mouse port [Green]

 

 

B

PS/2 keyboard port [Purple]

 

 

C

Serial port A [Teal]

 

 

D

Parallel port [Burgundy]

 

 

E

Audio line in/Retasking Jack C [Blue]

 

 

F

Front left/right channel audio out/Two channel audio line out/Retasking Jack D

 

[Lime green]

 

 

G

Mic in/Retasking Jack B [Pink]

 

 

H

USB ports (two)

 

 

I

IEEE-1394a connector (optional)

 

 

J

LAN

 

 

K

USB ports (two)

 

 

67

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

2.8.2Component-side Connectors

Figure 21 shows the locations of the component-side connectors of the D925XCV board.

 

 

 

 

 

 

 

 

 

 

E

 

 

F

G I

 

 

 

K

 

 

 

 

 

 

M

 

 

 

 

 

O

 

 

 

A B C D

 

 

 

 

 

 

 

 

 

 

 

H

J

L

 

N

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

4

 

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

4

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

9

 

 

 

10

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

1

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2

 

 

1

1

 

10

 

1

 

 

1

2

9

1

1

1

 

 

 

 

 

 

 

 

10

2

 

 

 

 

 

 

 

 

1

2

2

1

 

3

 

 

 

 

 

 

10

1

 

 

4

 

 

 

 

1

1

2

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

24

 

 

2

 

 

 

 

23

 

 

1

 

 

 

2

40

2

 

34

 

 

 

1

 

 

 

33

 

 

 

 

39 1

 

 

EE DD CC BB Z

X

V

T

S

 

R

Q P

AA

Y

W

U

 

 

 

 

OM16681

Figure 21. D925XCV Component-side Connectors

Table 19 lists the D925XCV component-side connectors identified in Figure 21.

68

Technical Reference

Table 19. D925XCV Component-side Connectors Shown in Figure 21.

Item/callout from Figure 21

Description

 

 

A

PCI Conventional bus add-in card connector 4

 

 

B

Auxiliary rear fan connector

 

 

C

PCI Conventional bus add-in card connector 3

 

 

D

ATAPI CD-ROM connector

 

 

E

PCI Express x1 bus add-in card connector 2

 

 

F

PCI Express x1 bus add-in card connector 1

 

 

G

Front panel audio connector

 

 

H

PCI Conventional bus add-in card connector 2

 

 

I

Front panel IEEE-1394a connector (optional)

 

 

J

PCI Conventional bus add-in card connector 1

 

 

K

Front panel IEEE-1394a connector (optional)

 

 

L

PCI Express x16 bus add-in card connector

 

 

M

Rear chassis fan connector

 

 

N

Alternate power connector

 

 

O

+12V power connector (ATX12V)

 

 

P

Processor fan connector

 

 

Q

Power connector

 

 

R

Diskette drive connector

 

 

S

Parallel ATA IDE connector

 

 

T

Chassis intrusion connector

 

 

U

Front chassis fan connector

 

 

V

Serial ATA connector 1

 

 

W

Serial ATA connector 3

 

 

X

Serial ATA connector 2

 

 

Y

Serial ATA connector 0

 

 

Z

Auxiliary front panel power LED connector

 

 

AA

Front panel connector

 

 

BB

SCSI hard drive indicator LED (optional)

 

 

CC

Auxiliary power output connector

 

 

DD

Front panel USB connector

 

 

EE

Front panel USB connector

 

 

69

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

Figure 22 shows the locations of the component-side connectors of the D925XBC board.

 

A

B

D

 

G

I

 

 

 

 

 

 

 

C

E

F

H

 

 

 

 

 

1

 

2

 

 

 

 

 

 

 

 

9

 

10

 

1

4

4

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

 

1

1

3

 

 

 

Y

1

 

 

 

 

1

2

 

 

 

4

 

 

 

 

 

 

1

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

 

 

 

 

 

2

 

 

9

1

1

1

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

10

 

 

 

 

 

3

 

 

 

1

2

 

2

1

 

 

 

 

 

 

 

 

 

 

 

 

X

 

 

 

10

 

 

1

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

1

2

 

 

 

 

 

 

 

 

 

W

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24

 

 

2

 

U

 

 

 

 

2

23

 

 

1

34

 

 

 

 

40

2

 

 

 

 

 

 

1

 

 

 

 

33

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

39 1

 

 

 

T R P N M L K J

S Q O

OM16691

Figure 22. D925XBC Component-side Connectors

Table 20 lists the D925XBC component-side connectors identified in Figure 22.

70

Technical Reference

Table 20. D925XBC Component-side Connectors Shown in Figure 22.

Item/callout from Figure 22

Description

 

 

A

PCI Express x1 bus add-in card connector

 

 

B

Front panel audio connector

 

 

C

PCI Conventional bus add-in card connector 2

 

 

D

Front panel IEEE-1394a connector (optional)

 

 

E

PCI Conventional bus add-in card connector 1

 

 

F

PCI Express x16 bus add-in card connector

 

 

G

Rear chassis fan connector

 

 

H

Alternate power connector

 

 

I

+12V power connector (ATX12V)

 

 

J

Processor fan connector

 

 

K

Power connector

 

 

L

Diskette drive connector

 

 

M

Parallel ATA IDE connector

 

 

N

Chassis intrusion connector

 

 

O

Front chassis fan connector

 

 

P

Serial ATA connector 1

 

 

Q

Serial ATA connector 3

 

 

R

Serial ATA connector 2

 

 

S

Serial ATA connector 0

 

 

T

Auxiliary front panel power LED connector

 

 

U

Front panel connector

 

 

V

Front panel USB connector

 

 

W

Front panel USB connector

 

 

X

Front panel IEEE-1394a connector (optional)

 

 

Y

ATAPI CD-ROM connector

 

 

71

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

Table 21. ATAPI CD-ROM Connector

Pin

Signal Name

 

 

1

Left audio input from CD-ROM

 

 

2

CD audio differential ground

 

 

3

CD audio differential ground

 

 

4

Right audio input from CD-ROM

 

 

Table 22. Front Panel Audio Connector

Pin

Signal Name

Pin

Signal Name

 

 

 

 

1

Port E [Port 1] Left Channel

2

Ground

 

 

 

 

3

Port E [Port 1] Right Channel

4

Presence# (dongle present)

 

 

 

 

5

Port F [Port 2] Right Channel

6

Port E [Port 1] Sense return

 

 

 

(jack detection)

 

 

 

 

7

Port E [Port 1] and Port F [Port 2]

8

Key

 

Sense send (jack detection)

 

 

 

 

 

 

9

Port F [Port 2] Left Channel

10

Port F [Port 2] Sense return

 

 

 

(jack detection)

 

 

 

 

INTEGRATOR’S NOTE

The front panel audio connector is colored yellow.

Table 23. Front Chassis Fan and Rear Chassis

Fan Connectors

Pin

Signal Name

1Control

2+12 V

3Tach

Table 24. Processor Fan Connector and Auxiliary

Rear Fan Connector

Pin

Signal Name

1Ground

2+12 V

3FAN_TACH

4FAN_CONTROL

NOTE

The auxiliary rear fan connector is present only on the D925XCV board. It is not present on the D925XBC board.

72

Technical Reference

Table 25. Chassis Intrusion Connector

Pin

Signal Name

1Intruder

2Ground

Table 26. SCSI Hard Drive Activity LED

Connector (Optional)

Pin

Signal Name

1SCSI_ACT#

2No connect

Table 27. Serial ATA Connectors

Pin

Signal Name

1Ground

2TXP

3TXN

4Ground

5RXN

6RXP

7Ground

Table 28. Auxiliary Power Output Connector

Pin

Signal Name

1+12 V

2Ground

3Ground

4+5 V

NOTE

The auxiliary power output connector is present only on the D925XCV board. It is not present on the D925XBC board.

73

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

2.8.2.1Power Supply Connectors

The board has three power supply connectors:

Main power – a 2 x 12 connector. This connector is compatible with 2 x 10 connectors previously used on Intel Desktop boards. The board supports the use of ATX12V power supplies with either 2 x 10 or 2 x 12 main power cables. When using a power supply with a 2 x 10 main power cable, attach that cable on the rightmost pins of the main power connector, leaving pins 11, 12, 23, and 24 unconnected.

ATX12V power – a 2 x 2 connector. This connector provides power directly to the processor voltage regulator and must always be used. Failure to do so will prevent the board from booting.

Alternate power – a 1 x 4 connector. This connector provides additional power when using high wattage PCI Express x16 graphics cards.

INTEGRATOR’S NOTE

When using high wattage PCI Express x16 graphics cards, use one of the following power supply configurations to avoid system instability:

The preferred method of power delivery is to use a power supply with a 2 x 12 main power cable. In this configuration, use two connectors to provide power to the board:

The main power connector

The ATX12V connector

In this configuration, the alternate power connector is not required. The 2 x 12 main power cable can provide up to 144 W of power from the +12 V rail.

An alternate method of power delivery is to use a power supply has a 2 x 10 main power cable. In this configuration, use three connectors to provide power to the board:

The main power connector

The ATX12V connector

The alternate power connector

The combination of the 2 x 10 main power cable and the alternate power cable can provide up to 144 W of power from the +12 V rail (72 W each).

74

Technical Reference

Table 29. Main Power Connector

Pin

Signal Name

Pin

Signal Name

 

 

 

 

1

+3.3 V

13

+3.3 V

 

 

 

 

2

+3.3 V

14

-12 V

 

 

 

 

3

Ground

15

Ground

 

 

 

 

4

+5 V

16

PS-ON# (power supply remote on/off)

 

 

 

 

5

Ground

17

Ground

 

 

 

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