Intel BOXDG41AN, DG41AN Technical Product Specification

Intel® Desktop Board DG41AN

Technical Product Specification

Order Number: E96323-001US

The Intel® Desktop Board DG41AN 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 DG41AN Specification Update.

June 2010

Revision History

Revision Revision History Date

-001 First release of the Intel® Desktop Board DG41AN Technical Product Specification

This product specification applies to only the standard Intel® Desktop Board DG41AN with BIOS identifier ANG4110H.86A.

Changes to this specification will be published in the Intel Desktop Board DG41AN Specification Update before being incorporated into a revision of this document.

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desktop boards are evaluated as Information Technology Equipment (I.T.E.) for use in personal

June 2010

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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.

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Preface

This Technical Product Specification (TPS) specifies the board layout, components, connectors, power and environmental requirements, and the BIOS for the

Intel

Desktop Board DG41AN.

Intended Audience

The TPS is intended to provide detailed, technical information about the Intel Desktop Board DG41AN and its 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

1 A description of the hardware used on the Intel Desktop Board DG41AN 2 A map of the resources of the Intel Desktop Board 3 The features supported by the BIOS Setup program 4 A description of the BIOS error messages, beep codes, and POST codes 5 Regulatory compliance and battery disposal information

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.

CAUTION

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

iii

Intel Desktop Board DG41AN Technical Product Specification

Other Common Notation

# Used after a signal name to identify an active-low signal (such as USBP0#) GB Gigabyte (1,073,741,824 bytes) GB/s Gigabytes per second Gb/s Gigabits per second KB Kilobyte (1024 bytes) Kbit Kilobit (1024 bits) kbits/s 1000 bits per second MB Megabyte (1,048,576 bytes) MB/s Megabytes per second Mbit Megabit (1,048,576 bits) Mbits/s 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.

Contents

1 Product Description

1.1 Overview.......................................................................................... 9

1.1.1 Feature Summary .................................................................. 9

1.1.2 Board Layout ....................................................................... 11

1.1.3 Block Diagram ..................................................................... 13

1.2 Legacy Considerations...................................................................... 14

1.3 Online Support................................................................................ 14

1.4 Processor ....................................................................................... 14

1.5 System Memory .............................................................................. 15

1.5.1 Memory Configurations ......................................................... 17

1.6 Intel® G41 Express Chipset............................................................... 19

1.6.1 Intel G41 Graphics Subsystem ............................................... 19

1.6.2 USB ................................................................................... 21

1.6.3 Serial ATA Interfaces ............................................................ 21

1.7 Real-Time Clock Subsystem .............................................................. 22

1.8 Legacy I/O Controller ....................................................................... 22

1.8.1 Serial Port Interface.............................................................. 22

1.8.2 PS/2 Keyboard/Mouse Interface ............................................. 23

1.9 Audio Subsystem............................................................................. 23

1.9.1 Audio Subsystem Software .................................................... 24

1.9.2 Audio Connectors and Headers ............................................... 24

1.10 LAN Subsystem............................................................................... 25

1.10.1 LAN Subsystem Software....................................................... 25

1.10.2 RJ-45 LAN Connector with Integrated LEDs .............................. 26

1.11 Hardware Management Subsystem .................................................... 27

1.11.1 Hardware Monitoring and Fan Control...................................... 27

1.11.2 Fan Monitoring..................................................................... 27

1.11.3 Chassis Intrusion and Detection.............................................. 27

1.11.4 Thermal Monitoring .............................................................. 28

1.12 Power Management ......................................................................... 29

1.12.1 ACPI................................................................................... 29

1.12.2 Hardware Support ................................................................ 32

2 Technical Reference

2.1 Memory Map................................................................................... 37

2.1.1 Addressable Memory............................................................. 37

2.2 Connectors and Headers................................................................... 40

2.2.1 Back Panel Connectors .......................................................... 41

2.2.2 Component-side Connectors and Headers ................................ 42

2.3 Jumper Block .................................................................................. 50

2.4 Mechanical Considerations ................................................................ 52

2.4.1 Form Factor......................................................................... 52

2.5 Electrical Considerations ................................................................... 53

2.5.1 Power Supply Considerations ................................................. 53

2.5.2 Fan Header Current Capability................................................ 54

2.5.3 Add-in Board Considerations .................................................. 54

2.6 Thermal Considerations .................................................................... 54

2.7 Reliability ....................................................................................... 56

2.8 Environmental ................................................................................ 57

3 Overview of BIOS Features

3.1 Introduction ................................................................................... 59

3.2 BIOS Flash Memory Organization ....................................................... 60

3.3 Resource Configuration .................................................................... 60

3.3.1 PCI Autoconfiguration ........................................................... 60

3.4 System Management BIOS (SMBIOS)................................................. 61

3.5 Legacy USB Support ........................................................................ 61

3.6 BIOS Updates ................................................................................. 62

3.6.1 Language Support ................................................................ 62

3.6.2 Custom Splash Screen .......................................................... 63

3.7 BIOS Recovery................................................................................ 63

3.8 Boot Options................................................................................... 64

3.8.1 Optical Drive Boot ................................................................ 64

3.8.2 Network Boot....................................................................... 64

3.8.3 Booting Without Attached Devices........................................... 64

3.8.4 Changing the Default Boot Device During POST ........................ 64

3.9 Adjusting Boot Speed....................................................................... 65

3.9.1 Peripheral Selection and Configuration..................................... 65

3.9.2 BIOS Boot Optimizations ....................................................... 65

3.10 BIOS Security Features .................................................................... 66

4 Error Messages and Beep Codes

4.1 Speaker ......................................................................................... 67

4.2 BIOS Beep Codes ............................................................................ 67

4.3 Front-panel Power LED Blink Codes .................................................... 68

4.4 BIOS Error Messages ....................................................................... 68

4.5 Port 80h POST Codes ....................................................................... 69

5 Regulatory Compliance and Battery Disposal Information

5.1 Regulatory Compliance..................................................................... 75

5.1.1 Safety Standards.................................................................. 75

5.1.2 European Union Declaration of Conformity Statement................ 76

5.1.3 Product Ecology Statements................................................... 77

5.1.4 EMC Regulations .................................................................. 79

5.1.5 ENERGY STAR* 5.0, e-Standby, and ErP Compliance ................. 82

5.1.6 Regulatory Compliance Marks (Board Level) ............................. 83

5.2 Battery Disposal Information............................................................. 84

Contents

Figures

1. Major Board Components.................................................................. 11

2. Block Diagram ................................................................................ 13

3. Memory Channel Configuration and DIMM Configuration........................ 18

4. Back Panel Audio Connectors ............................................................ 24

5. LAN Connector LED Locations............................................................ 26

6. Thermal Sensors and Fan Headers ..................................................... 28

7. Location of the Standby Power Indicator LED....................................... 35

8. Detailed System Memory Address Map ............................................... 38

9. Back Panel Connectors ..................................................................... 41

10. Component-side Connectors and Headers ........................................... 42

11. Connection Diagram for Front Panel Header ........................................ 47

12. Connection Diagram for Front Panel USB Headers ................................ 49

13. Location of the Jumper Block............................................................. 50

14. Board Dimensions ........................................................................... 52

15. Localized High Temperature Zones..................................................... 55

Tables

1. Feature Summary.............................................................................. 9

2. Board Components Shown in Figure 1 ................................................ 12

3. Supported Memory Configurations ..................................................... 16

4. Audio Jack Support.......................................................................... 23

5. LAN Connector LED States................................................................ 26

6. Effects of Pressing the Power Switch .................................................. 29

7. Power States and Targeted System Power........................................... 30

8. Wake-up Devices and Events ............................................................ 31

9. System Memory Map ....................................................................... 39

10. Component-side Connectors and Headers Shown in Figure 10................ 43

11. Serial ATA Connectors...................................................................... 44

12. Chassis Intrusion Header.................................................................. 44

13. Serial Port Header ........................................................................... 44

14. Front Chassis Fan Header ................................................................. 44

15. Processor Fan Header ...................................................................... 44

16. Front Panel Audio Header for Intel® HD Audio...................................... 45

17. Front Panel Audio Header for AC ’97 Audio .......................................... 45

18. Auxiliary Front Panel Power/Sleep LED Header..................................... 45

19. Processor Core Power Connector........................................................ 46

20. Main Power Connector...................................................................... 46

21. Front Panel Header .......................................................................... 47

22. States for a One-Color Power LED...................................................... 48

23. States for a Two-Color Power LED...................................................... 48

24. Auxiliary Front Panel Power LED Header.............................................. 48

25. BIOS Setup Configuration Jumper Settings.......................................... 51

26. Recommended Power Supply Current Values ....................................... 53

27. Fan Header Current Capability........................................................... 54

28. Thermal Considerations for Components ............................................. 56

vii

29. Intel Desktop Board DG41AN Environmental Specifications.................... 57

30. BIOS Setup Program Menu Bar.......................................................... 60

31. BIOS Setup Program Function Keys.................................................... 60

32. Acceptable Drives/Media Types for BIOS Recovery ............................... 63

33. Boot Device Menu Options ................................................................ 64

34. Supervisor and User Password Functions............................................. 66

35. BIOS Beep Codes ............................................................................ 67

36. Front-panel Power LED Blink Codes.................................................... 68

37. BIOS Error Messages ....................................................................... 68

38. Port 80h POST Code Ranges.............................................................. 69

39. Port 80h POST Codes ....................................................................... 70

40. Typical Port 80h POST Sequence........................................................ 73

41. Safety Standards............................................................................. 75

42. EMC Regulations ............................................................................. 79

43. Regulatory Compliance Marks............................................................ 83

viii

1 Product Description

1.1 Overview

1.1.1 Feature Summary

Table 1 summarizes the major features of Intel® Desktop Board DG41AN.

Table 1. Feature Summary

Form Factor Mini-ITX (6.7 inches by 6.7 inches [170.18 millimeters by 170.18 millimeters]) Processor Support for the following 65 W TDP processors:

Memory

Chipset

Video Intel® Graphics Media Accelerator X4500 (Intel

Audio 5.1+2-channel audio subsystem using the Realtek* ALC888VC audio codec

Legacy I/O Control

Peripheral Interfaces

LAN Support 10/100/1000 Mbits/sec LAN subsystem using a Realtek RTL8111E Gigabit Ethernet

BIOS

• Intel

• Two 240-pin DDR3 SDRAM Dual Inline Memory Module (DIMM) sockets

• Support for DDR3 800 MHz, 1066 MHz, and 1333 (Overclocked (OC)) MHz

• Support for up to 4 GB of system memory

Intel

• Intel

subsystem

Winbond W83627DHG-P based Legacy I/O controller for hardware management, serial, parallel, and PS/2* ports

• Eight USB 2.0 ports: four back panel connectors and two front panel headers for

• Three Serial ATA (SATA) interfaces

• One PS/2 keyboard/mouse port on back panel

• One serial port header (may require specialized chassis or cable for use)

• Parallel port on back panel

Controller

• Intel BIOS (resident in the SPI Flash device)

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

Celeron® processor E1000/E3000 series in an LGA775 socket

Celeron® processor 400 Sequence in an LGA775 socket

Pentium® processor E2000/E5000/E6000 series in an LGA775 socket

Core™2 Duo processor E4000/E5000/E6000/E8000 series in an LGA775

socket

Core™2 Quad Q8000s/Q9000s series in an LGA775 socket

Xeon® processor 3000/E3000 series in an LGA775 socket

DIMMs

Note: DDR3 1333 MHz memory runs at 1066 MHz by default until manually overclocked through the system BIOS.

G41 Express Chipset, consisting of:

82G41 Graphics and Memory Controller Hub (GMCH)

82801GB I/O Controller Hub (ICH7)

GMA X4500) onboard graphics

support of four ports

and SMBIOS

continued

Intel Desktop Board DG41AN Technical Product Specification

Table 1. Feature Summary (continued)

Instantly Available PC Technology

Expansion Capabilities

Hardware Monitor Subsystem

• Support for PCI* Local Bus Specification Revision 2.3

• Suspend to RAM support

• Wake on PCI, LAN, serial port, front panel, PS/2 device, and USB ports

• One Conventional PCI bus connector

• Voltage sense to detect out of range power supply voltages

• Thermal sense to detect out of range thermal values

• Two fan headers

• Two fan sense inputs used to monitor fan activity

1.1.2 Board Layout

Figure 1 shows the location of the major components.

Product Description

Figure 1. Major Board Components

Table 2 lists the components identified in Figure 1.

Intel Desktop Board DG41AN Technical Product Specification

Table 2. Board Components Shown in Figure 1

Item/callout from Figure 1 Descri

A Back panel connectors B Processor core power connector (2 x 2) C Front panel USB header D Front panel USB header

E Alternate front panel power LED header

F BIOS Setup configuration jumper block G LGA775 processor socket H Front chassis fan header

I Processor fan header J Front panel header

K Main Power connector (2 x 12)

L Standby power LED M Battery N Piezoelectric speaker O DIMM Channel A socket

P DIMM Channel B socket Q Intel 82G41 GMCH R Intel 82801GB I/O Controller Hub (ICH7) S Serial ATA connectors (3)

T Conventional PCI bus add-in connector U Front panel audio header V Chassis intrusion header W Serial port header

ption

1.1.3 Block Diagram

Figure 2 is a block diagram of the major functional areas.

Product Description

Figure 2. Block Diagram

Intel Desktop Board DG41AN Technical Product Specification

1.2 Legacy Considerations

This board differs from other Intel® Desktop Board products, with specific changes including (but not limited to) the following:

• No serial port on the back panel

• No diskette drive connector

1.3 Online Support

To find information about… Visit this World Wide Web site:

Intel Desktop Board D425KT and Intel Desktop Board D425KTW

Desktop Board Support http://www.intel.com/p/en_US/support?iid=hdr+support Available configurations for the Intel

Desktop Board D425KT and Intel Desktop Board D425KTW

Supported processors http://processormatch.intel.com Chipset information http://www.intel.com/products/desktop/chipsets/index.htm BIOS and driver updates http://downloadcenter.intel.com Tested memory http://www.intel.com/support/motherboards/desktop/sb/CS-

Integration information http://www.intel.com/support/go/buildit

http://www.intel.com/products/motherboard/index.htm

http://ark.intel.com

025414.htm

1.4 Processor

The board is designed to support the following processors:

• Intel

Other processors may be supported in the future. This board is designed to support processors with a maximum wattage of 65 W. The processors listed above are only supported when falling within the wattage requirements of the board. See the Intel web site listed below for the most up-to-date list of supported processors.

For information about… Refer to:

Supported processors http://processormatch.intel.com

CAUTION

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

socket

Celeron® processor E1000/E3000 series in an LGA775 socket Celeron® processor 400 Sequence in an LGA775 socket Pentium® processor E2000/E5000/E6000 series in an LGA775 socket Core™2 Duo processor E4000/E5000/E6000/E8000 series in an LGA775

Core™2 Quad Q8000s/Q9000s series in an LGA 775 socket Xeon® processor 3000/E3000 series in an LGA775 socket

Product Description

INTEGRATOR’S NOTE

Use only ATX12V-compliant power supplies.

For information about

Power supply connectors Section 2.2.2.4, page 46

Refer to

1.5 System Memory

The board has two DIMM sockets and supports the following memory features:

• 1.5 V DDR3 SDRAM DIMMs with gold plated contacts, with the option to raise the

voltage to support higher performance DDR3 SDRAM DIMMs

• Dual channel interleaved mode support

• 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 (with two 2 GB DIMMs). Refer to

Section 2.1.1 on page 37 for information on the total amount of addressable memory.

• Minimum total system memory: 512 MB

• Non-ECC DIMMs

• Serial Presence Detect

• DDR3 800 MHz, DDR3 1066 MHz, and DDR3 1333 (overclocking required) MHz

SDRAM DIMMs

Note: DDR3-1333 memory operates at 1066 MHz by default until manually

overclocked through the system BIOS.

CAUTION

Altering PC memory frequency, voltage and/or latency may: (i) reduce system stability and useful life of the system, memory and processor; (ii) cause the processor and other system components to fail; (iii) cause reductions in system performance; (iv) cause additional heat or other damage; and (v) affect system data integrity. Intel has not tested, and does not warranty, the operation of the memory beyond its specifications. Intel assumes no responsibility that the memory, including if used with altered clock frequencies and/or voltages, will be fit for any particular purpose. Check with the memory manufacturer for warranty and additional details.

Intel Desktop Board DG41AN Technical Product Specification

The Desktop Board supports multiple processor and memory speeds. It is important to understand that not all memory speeds are supported with all processor speeds. Memory speed cannot exceed the Front Side Bus (FSB) speed of the processor. Table 3 lists the supported processor FSB and memory speeds.

Table 3.

Processor FSB DDR3-800 Memory DDR3-1066 Memory DDR3-1066 Memory

800 MHz Memory runs at

1066 MHz Memory runs at

1333 MHz Memory runs at

Processor and Memory Speeds

Memory runs at

800 MHz

800 MHz; cannot be overclocked

Memory runs at

800 MHz; cannot be

1066 MHz

overclocked

Memory runs at 800 MHz; cannot be overclocked

1066 MHz; cannot

be overclocked

Memory runs at 800 MHz; cannot be overclocked

Memory runs at 1066 MHz; cannot be overclocked

Memory may be overclocked to 1333 MHz; memory runs at 1066 MHz

 NOTE

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 enables 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 4 lists the supported DIMM configurations.

Table 4. Supported Memory Configurations

DIMM Capacity

1024 MB Single-sided 1 Gbit 1 Gb x8/empty 8 2048 MB Double-sided 1 Gbit 1 Gb x8/1 Gb x8 16 2048 MB Single-sided 2 Gbit 2 Gb x8/empty 8

Note: 4 GB DIMM modules are not supported.

For information about… Refer to:

Tested Memory http://support.intel.com/support/motherboards/desktop/sb/

Configuration

(Note)

SDRAM Density

SDRAM Organization Front-side/Back-side

CS-025414.htm

Number of SDRAM Devices

Product Description

1.5.1 Memory Configurations

The Intel 82G41 GMCH supports the following 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.

• Flex mode. This mode provides the most flexible performance characteristics.

The bottommost DRAM memory (the memory that is lowest within the system memory map) is mapped to dual channel operation; the topmost DRAM memory (the memory that is nearest to the 4 GB address space limit), if any, is mapped to single channel operation. Flex mode results in multiple zones of dual and single channel operation across the whole of DRAM memory. To use flex mode, it is necessary to populate both channels.

For information about… Refer to:

Memory Configuration Examples http://www.intel.com/support/motherboards/desktop/sb/cs-

011965.htm

Intel Desktop Board DG41AN Technical Product Specification

Figure 3 illustrates the memory channel and DIMM configuration.

Figure 3. Memory Channel Configuration and DIMM Configuration

INTEGRATOR’S NOTE

Regardless of the memory configuration used (dual channel, single channel, or flex mode), DIMM 0 of Channel A must always be populated.

Product Description

1.6 Intel

The Intel G41 Express chipset consists of the following devices:

• Intel 82G41 Graphics and Memory Controller Hub (GMCH) with Direct Media

Interface (DMI) interconnect

• Intel 82801GB I/O Controller Hub (ICH7) with DMI interconnect The GMCH component provides interfaces to the processor, memory, PCI, and the DMI

interconnect. The component also provides integrated graphics capabilities supporting 3D, 2D, and display capabilities. The ICH7 is a centralized controller for the board’s I/O paths.

The chipset supports the following features:

• Onboard graphics

• Dynamic Video Memory Technology

• USB

• Serial ATA

For information about Refer to

The Intel G41 Express chipset http://www.intel.com/products/desktop/chipsets/index.htm Resources used by the chipset Chapter 2

G41 Express Chipset

1.6.1 Intel G41 Graphics Subsystem

The Intel G41 Express chipset contains two separate graphics options. Either the Intel Graphics Media Accelerator X4500 (Intel GMA X4500) graphics controller (contained within the 82G41 GMCH) is used, or a PCI graphics card can be used. When a PCI graphics card is installed, the Intel GMA X4500 graphics controller defaults to a secondary display device and may be available for video output with the operating system.

1.6.1.1 Intel

Graphics Media Accelerator X4500 Graphics

Controller

The Intel GMA X4500 graphics controller features the following:

• High quality texture engine ⎯ DirectX10* and OpenGL* 2.0 compliant ⎯ Shader Model 4.0

• 3D Graphics Rendering enhancements ⎯ 1.6 dual texture GigaPixel/s maximum fill rate ⎯ 16-bit and 32-bit color ⎯ Vertex cache

• Video ⎯ High Definition content at up to 1080p resolution ⎯ Dynamic Video Memory Technology (DVMT) 5.0 uses system memory based on

the operating system and the amount of memory installed

Intel Desktop Board DG41AN Technical Product Specification

• Display ⎯ Supports digital and analog displays up to 2048 x 1536 at 75 Hz refresh

(QXGA); also supports 1920 x 1080 resolution for full High Definition video playback quality

⎯ Dual independent display support

1.6.1.2 Dynamic Video Memory Technology (DVMT 5.0)

DVMT enables enhanced graphics and memory performance through highly efficient memory utilization. DVMT ensures the most efficient use of available system memory for maximum 2-D/3-D graphics performance. The amount of system memory allocated to DVMT varies depending on the amount of total system memory installed as well as the operating system being used. For Microsoft Windows Vista*, a minimum of 128 MB can be allocated to DVMT and a maximum of over 2 GB can be allocated to DVMT with the correct amount of memory installed. DVMT returns system memory back to the operating system when the additional system memory is no longer required by the graphics subsystem.

DVMT will always use a minimal fixed portion of system physical memory (as set in the BIOS Setup program) for compatibility with legacy applications. An example of this would be when using VGA graphics under DOS. Once loaded, the operating system and graphics drivers allocate additional system memory to the graphics buffer as needed for performing graphics functions.



NOTE

The use of DVMT requires operating system driver support.

1.6.1.3 Configuration Modes

The video modes supported by this board are based on the Extended Display Identification Data (EDID) modes of the monitor to which the system is connected. Standard monitors are assumed.

1.6.1.4 Analog Display (VGA)

The VGA port supports analog displays. The maximum supported resolution is 2048 x 1536 (QXGA) at a 75 Hz refresh rate.

The VGA port is enabled for POST whenever a monitor is attached, regardless of the DVI-D connector status.

1.6.1.5 Digital Visual Interface (DVI-D)

The DVI-D port supports digital DVI displays. The maximum supported resolution is 2048 x 1536 (QXGA) at a 75 Hz refresh rate. The DVI port is compliant with the DVI 1.0 specification.

Product Description

1.6.2 USB

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

The ICH7 provides the USB controller for all ports. The port arrangement is as follows:

• Four ports are implemented with stacked back panel connectors

• Four ports are routed to two separate front panel USB headers

For information about Refer to

The location of the USB connectors on the back panel Figure 9, page 41 The location of the front panel USB headers Figure 10, page 42

1.6.3 Serial ATA Interfaces

The board provides three Serial ATA (SATA) connectors, which support one device per connector.

1.6.3.1 Serial ATA Support

The board’s Serial ATA controller offers three independent Serial ATA ports with a theoretical maximum transfer rate of 3 Gb/s per port. One device can be installed on each port for a maximum of three 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 Conventional PCI bus resource steering is used. Native mode is the preferred mode for configurations using the Windows* XP operating system.



NOTE

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

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

For information about Refer to

The location of the Serial ATA connectors Figure 10, page 42

Intel Desktop Board DG41AN Technical Product Specification

1.7 Real-Time Clock Subsystem

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.

When the voltage drops below a certain level, the BIOS Setup program settings stored in CMOS RAM (for example, the date and time) might not be accurate. Replace the battery with an equivalent one. Figure 1 on page 11 shows the location of the battery.

1.8 Legacy I/O Controller

The I/O controller provides the following features:

• One serial port header

• One parallel port

• Serial IRQ interface compatible with serialized IRQ support for PCI systems

• PS/2-style keyboard/mouse interface

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

• PCI power management support

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

1.8.1 Serial Port Interface

The serial port header is located on the component side of the board. The serial port supports data transfers at speeds up to 115.2 kbits/s with BIOS support.

For information about Refer to

The location of the serial port header Figure 10, page 42 The serial port header signal mapping Table 14, page 44

1.8.2 PS/2 Keyboard/Mouse Interface

The one PS/2 keyboard/mouse connector is located on the back panel.

Product Description



NOTE

Power to the computer should be turned off before a keyboard is connected or disconnected.

For information about Refer to

The location of the keyboard/mouse connector Figure 9, page 41

1.9 Audio Subsystem

The onboard audio subsystem consists of the following:

• Intel 82801GB (ICH7)

• Realtek ALC888VC audio codec

• Back panel audio connectors

• Component-side audio headers/connectors: ⎯ Front panel audio header with support for Intel

HD Audio) and AC ’97 audio

The audio subsystem supports the following features:

• A signal-to-noise (S/N) ratio of 95 dB

• Independent 5.1 audio playback from back panel connectors and stereo playback

from the Intel High Definition Audio front panel header

High Definition Audio (Intel®



NOTE

Systems built with an AC ‘97 front panel will not be able to obtain the Microsoft Windows Vista logo.

Table 5 lists the supported functions of the front panel and back panel audio jacks.

Table 5. Audio Jack Support

Audio Jack

Front panel – Green No No No No Yes Front panel – Pink No No No Yes No Back panel – Blue Yes Yes No No No Back panel – Green No No No No Yes Back panel – Pink No No Yes Yes No

Supports

Line in?

Supports

Rear

Surround?

Supports

Center/

LFE?

Supports

Micro-

phone?

Supports

Line Out

Head-

phones or

Speaker?

Intel Desktop Board DG41AN Technical Product Specification

1.9.1 Audio 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 1.3, page 14

1.9.2 Audio Connectors and Headers

The board contains audio connectors on the back panel and audio headers on the component side of the board. The front panel audio header provides mic in and line out signals for the front panel. Microphone bias is supported for both the front and back panel microphone connectors.

The front/back panel audio connectors are configurable through the audio device drivers. The available configurable back panel audio ports are shown in Figure 4.

Item Description

A Line in B Line out C Mic in

Figure 4. Back Panel Audio Connectors



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.

For information about Refer to

The location of the front panel audio header Figure 10, page 42 The signal names of the front panel audio header Table 17, page 45 The back panel audio connectors Section 2.2.1, page 41

Product Description

1.10 LAN Subsystem

The LAN subsystem consists of the following:

• Intel 82801GB ICH7

• Realtek RTL8111E Gigabit Ethernet controller for 10/100/1000 Mbits/s Ethernet

LAN connectivity

• RJ-45 LAN connector with integrated status LEDs

Additional features of the LAN subsystem include:

• CSMA/CD protocol engine

• LAN connect interface between ICH7 and the LAN controller

• Conventional PCI bus power management ⎯ ACPI technology support ⎯ LAN wake capabilities

• LAN subsystem software

For information about Refer to

LAN software and drivers http://downloadcenter.intel.com

1.10.1 LAN 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 1.2, page 14

Intel Desktop Board DG41AN Technical Product Specification

1.10.2 RJ-45 LAN Connector with Integrated LEDs

Two LEDs are built into the RJ-45 LAN connector (shown in Figure 5).

Item Description

A Link LED (Green) B Data Rate LED (Green/Yellow)

Figure 5. LAN Connector LED Locations

Table 6 describes the LED states when the board is powered up and the LAN subsystem is operating.

Table 6. LAN Connector LED States

LED LED Color LED State Condition

Off LAN link is not established.

Link Green

Data Rate Green/Yellow

On LAN link is established. Blinking LAN activity is occurring. Off 10 Mbits/s data rate is selected. Green 100 Mbits/s data rate is selected. Yellow 1000 Mbits/s data rate is selected.

Product Description

1.11 Hardware Management Subsystem

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

• Fan monitoring and control

• Thermal and voltage monitoring

• Chassis intrusion detection

1.11.1 Hardware Monitoring and Fan Control

The features of the hardware monitoring and fan control include:

• The Legacy I/O Controller smart fan control, delivering acoustically-optimized thermal management

• Fan speed control controllers and sensors integrated into the Legacy I/O Controller

• Four thermal sensors (processor, 82G41 GMCH, 82801GB ICH7, and a remote

thermal sensor)

• Power supply monitoring of five voltages (+12 V, +5 V, +3.3 V, +1.125 V, and +VCCP) to detect levels above or below acceptable values

• Thermally monitored closed-loop fan control, for both fans, that can adjust the fan speed according to thermal conditions

1.11.2 Fan Monitoring

Fan monitoring can be implemented using third-party software. The level of monitoring and control is dependent on the I/O controller used with the board.

For information about Refer to

The functions of the fan headers Section 1.12.2.2, page 33 Location of the fan headers Figure 6, page 28

1.11.3 Chassis Intrusion and Detection

The board supports 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 header. When the chassis cover is removed, the mechanical switch is in the closed position.

For information about Refer to

The location of the chassis intrusion header Figure 10, page 42

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Intel BOXDG41AN, DG41AN Technical Product Specification

Specifications and Main Features

Frequently Asked Questions

User Manual