Intel BLKD945GCLF2D, D945GCLF2 Technical Product Specification
Intel® Desktop Board
D945GCLF2
Technical Product Specification
The Intel® Desktop Board D945GCLF2 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 D945GCLF2 Specification Update.
December 2008
Order Number: E45013-002US
Revision History
Revision Revision History Date
-001 First release of the Intel® Desktop Board D945GCLF2 Technical Product
Specification.
-002 Second release of the Intel® Desktop Board D945GCLF2 Technical
Product Specification. Covers both the D945GCLF2 and D945GCLF2D
desktop boards. Added copyright protection technology notice to
disclaimer. Updated current capability for rear chassis fan.
This product specification applies to only the standard Intel® Desktop Board D945GCLF2 with BIOS identifier
LF94510J.86A.
Changes to this specification will be published in the Intel Desktop Board D945GCLF2 Specification Update
before being incorporated into a revision of this document.
This product (D945GCLF2) incorporates copyright protection technology that is protected by U.S. patents
and other intellectual property rights. Use of this copyright protection technology must be authorized by
Macrovision*, and is intended for home and other limited viewing uses only unless otherwise authorized by
Macrovision. Reverse engineering or disassembly is prohibited.
®
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PRODUCTS. NO LICENSE,
September 2008
December 2008
Intel Corporation may have patents or pending patent applications, trademarks, copyrights, or other
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or “undefined.” Intel reserves these for future definition and shall have no responsibility whatsoever for
conflicts or incompatibilities arising from future changes to them.
®
Desktop Boards may contain design defects or errors known as errata, which may cause the product
Intel
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
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Copies of documents which have an ordering number and are referenced in this document, or other Intel
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Copyright © 2008, Intel Corporation. All rights reserved.
Preface
This Technical Product Specification (TPS) specifies the board layout, components,
connectors, power and environmental requirements, and the BIOS for the Intel
Desktop Board D945GCLF2. It describes the standard product and available
manufacturing options.
Intended Audience
The TPS is intended to provide detailed, technical information about the Intel Desktop
Board D945GCLF2 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 board
2 A map of the resources of the 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.
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 D945GCLF2 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/sec Gigabytes per second
Gbit Gigabit (1,073,741,824 bits)
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 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
1.6 Intel® 945GC Chipset....................................................................... 16
1.6.1 Intel 945GC Graphics Subsystem............................................ 16
1.6.2 USB ................................................................................... 18
1.6.3 IDE Support ........................................................................ 18
1.7 Real-Time Clock Subsystem .............................................................. 19
1.8 S-Video Output ............................................................................... 20
1.9 Legacy I/O Controller ....................................................................... 20
1.9.1 Serial Port........................................................................... 20
1.9.2 Parallel Port......................................................................... 20
1.9.3 Keyboard and Mouse Interface ............................................... 21
1.10 Audio Subsystem............................................................................. 22
1.10.1 Audio Subsystem Software .................................................... 23
1.10.2 Audio Connectors and Headers ............................................... 23
1.11 LAN Subsystem............................................................................... 24
1.11.1 LAN Subsystem Software....................................................... 24
1.11.2 RJ-45 LAN Connector with Integrated LEDs .............................. 25
1.12 Hardware Management Subsystem .................................................... 26
1.12.1 Hardware Monitoring............................................................. 26
1.12.2 Thermal Monitoring .............................................................. 27
1.13 Power Management ......................................................................... 28
1.13.1 ACPI................................................................................... 28
1.13.2 Hardware Support ................................................................ 31
1.13.3 ENERGY STAR* .................................................................... 35
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 .................................................................................. 49
2.4 Mechanical Considerations ................................................................ 50
2.4.1 Form Factor......................................................................... 50
2.5 Electrical Considerations ................................................................... 51
v
Intel Desktop Board D945GCLF2 Technical Product Specification
2.5.1 Power Supply Considerations ................................................. 51
2.5.2 Fan Header Current Capability................................................ 51
2.5.3 Add-in Board Considerations .................................................. 52
2.6 Thermal Considerations .................................................................... 52
2.7 Reliability ....................................................................................... 54
2.8 Environmental ................................................................................ 54
3 Overview of BIOS Features
3.1 Introduction ................................................................................... 55
3.2 BIOS Flash Memory Organization ....................................................... 56
3.3 Resource Configuration .................................................................... 56
3.3.1 PCI* Autoconfiguration.......................................................... 56
3.4 System Management BIOS (SMBIOS)................................................. 57
3.5 Legacy USB Support ........................................................................ 58
3.6 BIOS Updates ................................................................................. 59
3.6.1 Language Support ................................................................ 59
3.6.2 Custom Splash Screen .......................................................... 59
3.7 BIOS Recovery................................................................................ 60
3.8 Boot Options................................................................................... 61
3.8.1 CD-ROM Boot ...................................................................... 61
3.8.2 Network Boot....................................................................... 61
3.8.3 Booting Without Attached Devices........................................... 61
3.8.4 Changing the Default Boot Device During POST ........................ 61
3.9 Adjusting Boot Speed....................................................................... 62
3.9.1 Peripheral Selection and Configuration..................................... 62
3.9.2 BIOS Boot Optimizations ....................................................... 62
3.10 BIOS Security Features .................................................................... 63
4 Error Messages and Beep Codes
4.1 BIOS Front-panel Power LED Codes.................................................... 65
4.2 BIOS Beep Codes ............................................................................ 66
4.3 BIOS Error Messages ....................................................................... 66
4.4 Port 80h POST Codes ....................................................................... 67
5 Regulatory Compliance and Battery Disposal Information
5.1 Regulatory Compliance..................................................................... 73
5.1.1 Safety Standards.................................................................. 73
5.1.2 European Union Declaration of Conformity Statement................ 74
5.1.3 Product Ecology Statements................................................... 75
5.1.4 EMC Regulations .................................................................. 79
5.1.5 Product Certification Markings (Board Level)............................. 80
5.2 Battery Disposal Information............................................................. 81
vi
Contents
Figures
1. Major Board Components.................................................................. 11
2. Block Diagram ................................................................................ 13
3. Back Panel Audio Connectors ............................................................ 23
4. LAN Connector LED Locations............................................................ 25
5. Thermal Sensors and Fan Headers ..................................................... 27
6. Location of the Standby Power Indicator LED....................................... 35
7. Detailed System Memory Address Map ............................................... 38
8. Back Panel Connectors ..................................................................... 41
9. Component-side Connectors and Headers ........................................... 42
10. Connection Diagram for Front Panel Header ........................................ 46
11. Connection Diagram for Front Panel USB Headers ................................ 48
12. Location of the Jumper Block............................................................. 49
13. Board Dimensions ........................................................................... 50
14. Localized High Temperature Zones..................................................... 53
Tables
1. Feature Summary.............................................................................. 9
2. Board Components Shown in Figure 1 ................................................ 12
3. Supported Memory Configurations ..................................................... 15
4. Audio Jack Retasking Support ........................................................... 22
5. LAN Connector LED States................................................................ 25
6. Effects of Pressing the Power Switch .................................................. 28
7. Power States and Targeted System Power........................................... 29
8. Wake-up Devices and Events ............................................................ 30
9. System Memory Map ....................................................................... 39
10. Component-side Connectors and Headers Shown in Figure 9 ................. 43
11. Front Panel Audio Header ................................................................. 44
12. Serial ATA Connectors...................................................................... 44
13. Rear Chassis (3-Pin) Fan Header........................................................ 44
14. GMCH (3-Pin) Fan Header................................................................. 44
15. S/PDIF Connector............................................................................ 44
16. Main Power Connector...................................................................... 45
17. ATX12V Power Connector ................................................................. 46
18. Front Panel Header .......................................................................... 46
19. States for a One-Color Power LED...................................................... 47
20. States for a Two-Color Power LED...................................................... 47
21. BIOS Setup Configuration Jumper Settings.......................................... 49
22. Recommended Power Supply Current Values ....................................... 51
23. Fan Header Current Capability........................................................... 51
24. Thermal Considerations for Components ............................................. 53
25. Intel Desktop Board D945GCLF2 Environmental Specifications ............... 54
26. BIOS Setup Program Menu Bar.......................................................... 56
27. BIOS Setup Program Function Keys.................................................... 56
28. AcceptableDrives/Media Types for BIOS Recovery ................................ 60
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Intel Desktop Board D945GCLF2 Technical Product Specification
29. Boot Device Menu Options ................................................................ 61
30. Supervisor and User Password Functions............................................. 63
31. Front-panel Power LED Blink Codes.................................................... 65
32. Beep Codes .................................................................................... 66
33. BIOS Error Messages ....................................................................... 66
34. Port 80h POST Code Ranges.............................................................. 67
35. Port 80h POST Codes ....................................................................... 68
36. Typical Port 80h POST Sequence........................................................ 71
37. Safety Standards............................................................................. 73
38. Lead-Free Board Markings ................................................................ 78
39. EMC Regulations ............................................................................. 79
40. Product Certification Markings ........................................................... 80
viii
1 Product Description
1.1 Overview
This document covers Intel Desktop Boards D945GCLF2 and D945GCLF2D. For
readability, the document references the board product name as D945GCLF2 in all
instances.
1.1.1 Feature Summary
Table 1 summarizes the major features of the Intel Desktop Board D945GCLF2.
Table 1. Feature Summary
Form Factor Mini-ITX, compatible with microATX (6.75 inches by 6.75 inches
[171.45 millimeters by 171.45 millimeters])
Processor Support for the following:
• Soldered-down Dual-Core Intel
Memory
Chipset
Audio 5.1-channel audio subsystem using the Realtek* ALC662 high definition audio
Video Intel
Legacy I/O Control SMSC LPC47M997 based Legacy I/O controller for hardware management, serial,
Peripheral
Interfaces
LAN Support 10/100/1000 Mbits/sec LAN subsystem using Realtek 8111C GbE LAN adapter
BIOS
• One 240-pin DDR2 SDRAM Dual Inline Memory Module (DIMM) socket
• Support for DDR2 533 MHz and DDR2 400 MHz DIMMs (DDR2 800 MHz and
DDR 667 MHz validated to run at 533 MHz only)
• Support for up to 2 GB of system memory
®
945GC Chipset, consisting of:
Intel
®
• Intel
• Intel
codec
parallel, and PS/2* ports
• Eight USB 2.0 ports
• Two Serial ATA (SATA) headers
• One serial port
• One parallel port
• One Parallel ATA IDE interface with UDMA 33, ATA-66/100 support
• PS/2 keyboard and mouse ports
• One S-Video output port (not available on the D945GCLF2D desktop board)
device
• Intel
• Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,
82945GC Graphics Memory Controller Hub (GMCH)
®
82801GB I/O Controller Hub (ICH7)
®
GMA950 onboard graphics subsystem
®
BIOS (resident in the SPI Flash device)
and SMBIOS
®
Atom® processor
continued
9
Intel Desktop Board D945GCLF2 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, RS-232, front panel, USB ports, and LAN
• One PCI Conventional bus connector
• Hardware monitoring through the SMSC I/O controller
• 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
• Fan speed control
10
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.
11
Intel Desktop Board D945GCLF2 Technical Product Specification
Table 2. Board Components Shown in Figure 1
Item/callout
from Figure 1 Descri
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
S
PCI Conventional bus add-in card connector
Front panel audio header Front panel USB headers
Back panel connectors
+12 V power connector (ATX12V)
GMCH fan header
Chassis fan header
Intel Atom processor
Intel 82945GC GMCH
DIMM socket
Main power connector
Parallel ATA IDE connector
SATA connectors [2]
Front panel I/O header
Battery
Intel 82801GB I/O Controller Hub (ICH7)
BIOS Setup configuration jumper block
Front panel USB headers
S/PDIF connector
ption
12
Product Description
1.1.3 Block Diagram
Figure 2 is a block diagram of the major functional areas. The S-Video connector is
not available on the D945GCLF2D Desktop Board.
Figure 2. Block Diagram
13
Intel Desktop Board D945GCLF2 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 floppy drive connector
1.3 Online Support
To find information about… Visit this World Wide Web site:
Intel® Desktop Board D945GCLF2 http://www.intel.com/products/motherboard/D945GCLF2/index.htm
Intel Desktop Board Support http://support.intel.com/support/motherboards/desktop/d945gclf2/
Available configurations for the Intel
Desktop Board D945GCLF2
Chipset information http://www.intel.com/products/desktop/chipsets/index.htm
BIOS and driver updates http://downloadcenter.intel.com/Product_Filter.aspx?ProductID=292
http://www.intel.com/products/motherboard/D945GCLF2/index.htm
6
1.4 Processor
The board is designed to support the Dual-Core Intel Atom processor soldered down.
INTEGRATOR’S NOTE
#
Use only ATX12V-compliant power supplies.
For information about Refer to
Power supply connectors Section 2.2.2.3, page 45
14
Product Description
1.5 System Memory
The board has one 240-pin DIMM socket and supports the following memory features:
• 1.8 V (only) DDR2 SDRAM DIMMs with gold-plated contacts
• Unbuffered, single-sided or double-sided DIMMs with the following restriction:
Double-sided DIMMs with x16 organization are not supported.
• 2 GB maximum total system memory
• Minimum total system memory: 128 MB
• Non-ECC DIMMs
• Serial Presence Detect
• DDR2 533 MHz or DDR2 400 MHz SDRAM DIMMs (DDR2 800 MHz and DDR2
667 MHz validated to run at 533 MHz only)
NOTE
To be fully compliant with all applicable DDR2 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 3 lists the supported DIMM configurations.
Table 3. Supported Memory Configurations
DIMM
Capacity Configuration
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).
SDRAM
Density
SDRAM Organization
Front-side/Back-side
Number of SDRAM
Devices
For information about… Refer to:
Tested Memory http://support.intel.com/support/motherboards/desktop/sb/
CS-025414.htm
15
Intel Desktop Board D945GCLF2 Technical Product Specification
1.6 Intel
The Intel 945GC chipset consists of the following devices:
• Intel 82945GC Graphics 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 CPU, memory, PCI Express, 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.
For information about Refer to
The Intel 945GC chipset http://www.intel.com/products/desktop/chipsets/index.htm
Resources used by the chipset Chapter 2
®
945GC Chipset
1.6.1 Intel 945GC Graphics Subsystem
1.6.1.1 Intel
The Intel GMA950 graphics controller features the following:
• 400 MHz core frequency
• High performance 3-D setup and render engine
• High quality texture engine
⎯ DX9* Compliant Hardware Pixel Shader 2.0
⎯ Alpha and luminance maps
⎯ Texture color-keying/chroma-keying
⎯ Cubic environment reflection mapping
⎯ Enhanced texture blending functions
• 3D Graphics Rendering enhancements
⎯ 1.3 Dual Texture GigaPixel/Sec Fill Rate
⎯ 16 and 32 bit color
⎯ Maximum 3D supported resolution of 1600 x 1200 x 32 at 85 Hz
⎯ Vertex cache
⎯ Anti-aliased lines
⎯ OpenGL* version 1.4 support with vertex buffer and EXT_Shadow extensions
• 2D Graphics enhancements
⎯ 8, 16, and 32 bit color
⎯ Optimized 256-bit BLT engine
⎯ Color space conversion
⎯ Anti-aliased lines
®
GMA950 Graphics Controller
16
Product Description
• Video
⎯ Hardware motion compensation for MPEG2
⎯ Software DVD at 30 fps full screen
• Display
⎯ Integrated 24-bit 400 MHz RAMDAC
⎯ Up to 2048 x 1536 at 75 Hz refresh (QXGA)
• Dynamic Video Memory Technology (DVMT) support up to 224 MB
®
• Intel
For information about Refer to
Obtaining graphics software and utilities Section 1.2, page 14
Zoom Utility
1.6.1.2 Dynamic Video Memory Technology (DVMT)
DVMT enables enhanced graphics and memory performance through Direct AGP, and
highly efficient memory utilization. DVMT ensures the most efficient use of available
system memory for maximum 2-D/3-D graphics performance. Up to 224 MB of
system memory can be allocated to DVMT on systems that have 512 MB or more of
total system memory installed. Up to 128 MB can be allocated to DVMT on systems
that have 256 MB but less than 512 MB of total installed system memory. Up to 64
MB can be allocated to DVMT when less than 256 MB of system memory is 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
A list of supported modes for the Intel GMA950 graphics controller is available as a
downloadable document.
For information about Refer to
Supported video modes for the board Section 1.2, page 14
17
Intel Desktop Board D945GCLF2 Technical Product Specification
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 dual stacked back panel connectors
• Four ports are routed to two separate front panel USB headers
NOTE
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 8, page 41
The location of the front panel USB headers Figure 9, page 42
1.6.3 IDE Support
The board provides three IDE interface connectors:
• One parallel ATA IDE connector that supports two devices
• Two serial ATA connectors that support one device per connector
1.6.3.1 Parallel ATE IDE Interface
The ICH7’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.
• 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 ICH7’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.
18
Product Description
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.
For information about Refer to
The location of the Parallel ATA IDE connector Figure 9, page 42
1.6.3.2 Serial ATA Interfaces
The ICH7’s Serial ATA controller offers two independent Serial ATA ports with a
theoretical maximum transfer rate of 3 Gbits/sec per port. One device can be installed
on each port for a maximum of two 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 Vista* operating systems.
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 IDE connectors Figure 9, page 42
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.
19
Intel Desktop Board D945GCLF2 Technical Product Specification
1.8 S-Video Output
The D945GCLF2 desktop board supports S-Video output via a 7-pin S-Video connector
supporting both 4-pin S-Video and Composite signal. S-Video output is not available
on the D945GCLF2D desktop board.
1.9 Legacy 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
• 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.
1.9.1 Serial Port
The serial port A connector is 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 8, page 41
1.9.2 Parallel 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.
For information about Refer to
The location of the parallel port connector Figure 8, page 41
20
1.9.3 Keyboard and Mouse Interface
PS/2 keyboard and mouse connectors are located on the back panel.
Product Description
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 8, page 41
21
Intel Desktop Board D945GCLF2 Technical Product Specification
1.10 Audio Subsystem
The audio subsystem consists of the following devices:
• Intel 82801GB ICH7
• Realtek ALC662 audio codec
The audio subsystem includes these features:
• Signal-to-noise ratio ≥ 90 dB
• Supports wake events (driver dependent)
• Mic in pre-amp that supports dynamic, condenser, and electret microphones
The audio subsystem supports the following audio interfaces:
• S/PDIF connector
• Front panel audio header, including pins for:
⎯ Line out
⎯ Mic in
• Back panel audio connectors:
⎯ Line in
⎯ Line out
⎯ Mic in
NOTE
Systems built with an AC 97 front panel will not be able to obtain the Microsoft
Windows Vista* logo.
Table 4 lists the supported functions of the front panel and back panel audio jacks.
Table 4. Audio Jack Retasking Support
Audio Jack
Front panel – Green No Yes No No No Yes
Front panel – Pink No No No No Yes No
Back panel – Blue Yes No Yes No No No
Back panel – Green No Yes No No No Yes
Back panel – Pink No No No Yes Yes No
Supports
Line In?
Supports
Line/
Front Out?
Supports
Rear Out?
Supports
Center/LFE?
Supports
Mic?
Supports
HP?
22
Product Description
1.10.1 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 1.2, page 14
1.10.2 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 audio ports are shown in Figure 3.
Item Description
A Line in
B Line out
C Mic in
Figure 3. Back Panel Audio Connectors
For information about Refer to
The location of the front panel audio header Figure 9, page 42
The signal names of the front panel audio header Table 11, page 44
The back panel audio connectors Section 2.2.1, page 41
23
Intel Desktop Board D945GCLF2 Technical Product Specification
1.11 LAN Subsystem
The LAN subsystem consists of the following:
• Intel 82801GB ICH7
• Realtek 8111C GbE device for 10/100/1000 Mbits/sec 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 that supports the 82562G
• PCI Conventional bus power management
⎯ Supports ACPI technology
⎯ Supports LAN wake capabilities
1.11.1 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
24
Product Description
1.11.2 RJ-45 LAN Connector with Integrated LEDs
Two LEDs are built into the RJ-45 LAN connector (shown in Figure 4).
Figure 4. LAN Connector LED Locations
Table 5 describes the LED states when the board is powered up and the
10/100/1000 Mbits/sec LAN subsystem is operating.
Table 5. LAN Connector LED States
LED LED Color LED State Condition
A Green Blinking LAN activity is occurring.
Off 10 Mbits/sec data rate is selected.
B Yellow
On 100 Mbits/sec data rate is selected.
On 1000 Mbits/sec data rate is selected.
25
Intel Desktop Board D945GCLF2 Technical Product Specification
1.12 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:
• Thermal and voltage monitoring
• Chassis intrusion detection
1.12.1 Hardware Monitoring
The features of the hardware monitoring and fan control include:
• Internal ambient temperature sensor
• 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
• SMBus interface
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