INTEL 75-BOXD945GCLL

Description
Intel 75BOXD945GCLL MicroATX CPU Board with Socket 775, Intel 945G System Chipset, Intel GMA950 Video Chipset
Part Number
75-BOXD945GCLL
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INTEL
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Category
PRODUCTS - 7
Datasheet
Extracted Text
Intel® Desktop Board
D945GCL
Technical Product Specification
September 2006
Order Number: D73644-001US
®
The Intel Desktop Board D945GCL 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 D945GCL Specification Update.
Revision History
Revision Revision History Date
®
-001 First release of the Intel Desktop Board D945GCL Technical Product September 2006
Specification.
This product specification applies to only the standard Intel Desktop Board D945GCL with BIOS
identifier CL94510J.86A.
Changes to this specification will be published in the Intel Desktop Board D945GCL 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
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IMPLIED WARRANTY, RELATING TO SALE AND/OR USE OF INTEL PRODUCTS INCLUDING LIABILITY OR
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to any such patents, trademarks, copyrights, or other intellectual property rights.
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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.
®
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
product order.
Copies of documents which have an ordering number and are referenced in this document, or other Intel
literature, may be obtained from:
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Intel, the Intel logo, 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.
Copyright © 2006, 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 D945GCL. It describes the standard product and available
manufacturing options.
Intended Audience
The TPS is intended to provide detailed, technical information about the Desktop Board
D945GCL 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 Desktop Board D945GCL
2 A map of the resources of the 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.
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 D945GCL 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 Board D945GCL, 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
Gbits/sec Gigabits 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 Overview........................................................................................ 10
1.1.1 Feature Summary ................................................................ 10
1.1.2 Board Layout....................................................................... 12
1.1.3 Block Diagram ..................................................................... 14
1.2 Online Support................................................................................ 15
1.3 Processor ....................................................................................... 15
1.4 System Memory .............................................................................. 16
1.4.1 Memory Configurations ......................................................... 18
®
1.5 Intel 945G Chipset......................................................................... 20
1.5.1 Intel 945G Graphics Subsystem.............................................. 20
1.5.2 USB ................................................................................... 22
1.5.3 IDE Support ........................................................................ 23
1.5.4 Real-Time Clock, CMOS SRAM, and Battery.............................. 24
1.6 PCI Express* Connectors.................................................................. 24
1.7 Legacy I/O Controller....................................................................... 25
1.7.1 Serial Port........................................................................... 25
1.7.2 Parallel Port......................................................................... 25
1.7.3 Diskette Drive Controller ....................................................... 25
1.7.4 Keyboard and Mouse Interface ............................................... 25
1.8 Audio Subsystem............................................................................. 26
1.8.1 Audio Subsystem Software .................................................... 26
1.8.2 Audio Connectors ................................................................. 26
1.8.3 6-Channel (5.1) Audio Subsystem........................................... 27
1.9 LAN Subsystem............................................................................... 28
1.9.1 LAN Subsystem Software....................................................... 28
®
1.9.2 Intel 82562G Physical Layer Interface Device ......................... 28
1.10 Hardware Management Subsystem .................................................... 30
1.10.1 Hardware Monitoring and Fan Control ASIC.............................. 30
1.10.2 Chassis Intrusion and Detection.............................................. 30
1.10.3 Fan Monitoring..................................................................... 30
1.10.4 Thermal Monitoring .............................................................. 31
1.11 Power Management ......................................................................... 32
1.11.1 ACPI .................................................................................. 32
1.11.2 Hardware Support ................................................................ 34
2 Technical Reference
2.1 Memory Resources .......................................................................... 39
2.1.1 Addressable Memory............................................................. 39
2.1.2 Memory Map........................................................................ 41
2.2 DMA Channels................................................................................. 41
2.3 Fixed I/O Map................................................................................. 42
2.4 PCI Configuration Space Map ............................................................ 43
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Intel Desktop Board D945GCL Technical Product Specification
2.5 Interrupts ...................................................................................... 44
2.6 PCI Conventional Interrupt Routing Map ............................................. 45
2.7 Connectors and Headers................................................................... 46
2.7.1 Back Panel Connectors.......................................................... 47
2.7.2 Component-side Connectors and Headers ................................ 48
2.8 Jumper Block.................................................................................. 56
2.9 Mechanical Considerations ................................................................ 57
2.9.1 Form Factor......................................................................... 57
2.9.2 I/O Shield ........................................................................... 58
2.10 Electrical Considerations................................................................... 59
2.10.1 DC Loading.......................................................................... 59
2.10.2 Add-in Board Considerations .................................................. 59
2.10.3 Fan Header Current Capability................................................ 60
2.10.4 Power Supply Considerations ................................................. 60
2.11 Thermal Considerations.................................................................... 61
2.12 Reliability ....................................................................................... 63
2.13 Environmental ................................................................................ 64
3 Overview of BIOS Features
3.1 Introduction ................................................................................... 65
3.2 BIOS Flash Memory Organization....................................................... 66
3.3 Resource Configuration .................................................................... 66
3.3.1 PCI Autoconfiguration ........................................................... 66
3.3.2 PCI IDE Support................................................................... 66
3.4 System Management BIOS (SMBIOS)................................................. 67
3.5 BIOS Updates ................................................................................. 68
3.5.1 Language Support ................................................................ 68
3.5.2 Custom Splash Screen .......................................................... 68
3.6 Legacy USB Support ........................................................................ 69
3.7 Boot Options................................................................................... 69
3.7.1 CD-ROM Boot ...................................................................... 69
3.7.2 Network Boot....................................................................... 69
3.7.3 Booting Without Attached Devices........................................... 70
3.7.4 Changing the Default Boot Device During POST ........................ 70
3.8 Adjusting Boot Speed....................................................................... 71
3.8.1 Peripheral Selection and Configuration..................................... 71
3.8.2 BIOS Boot Optimizations ....................................................... 71
3.9 BIOS Security Features .................................................................... 72
4 Error Messages and Beep Codes
4.1 Speaker ......................................................................................... 73
4.2 BIOS Beep Codes ............................................................................ 73
4.3 BIOS Error Messages ....................................................................... 73
4.4 Port 80h POST Codes ....................................................................... 74
vi
Contents
5 Regulatory Compliance and Battery Disposal Information
5.1 Regulatory Compliance..................................................................... 79
5.1.1 Safety Regulations................................................................ 79
5.1.2 European Union Declaration of Conformity Statement................ 80
5.1.3 Product Ecology Statements................................................... 81
5.1.4 EMC Regulations .................................................................. 85
5.1.5 Product Certification Markings (Board Level)............................. 86
5.2 Battery Disposal Information............................................................. 87
Figures
1. Board Components.......................................................................... 12
2. Block Diagram................................................................................ 14
3. Memory Channel and DIMM Configuration ........................................... 18
4. Dual Channel (Interleaved) Mode Configuration with Two DIMMs............ 18
5. Single Channel (Asymmetric) Mode Configuration with One DIMM .......... 19
6. Single Channel (Asymmetric) Mode Configuration with Two DIMMs ......... 19
7. Front/Back Panel Audio Connector Options.......................................... 27
8. LAN Connector LED Locations............................................................ 29
9. Thermal Sensors and Fan Headers ..................................................... 31
10. Location of the Standby Power Indicator LED....................................... 37
11. Detailed System Memory Address Map ............................................... 40
12. Back Panel Connectors ..................................................................... 47
13. Component-side Connectors and Headers ........................................... 48
14. Connection Diagram for Front Panel Header ........................................ 53
15. Connection Diagram for Front Panel USB Headers ................................ 55
16. Location of the Jumper Block............................................................. 56
17. Board Dimensions........................................................................... 57
18. I/O Shield Dimensions...................................................................... 58
19. Localized High Temperature Zones..................................................... 62
Tables
1. Feature Summary............................................................................ 10
2. Board Components Shown in Figure 1 ................................................ 13
3. Supported Memory Configurations ..................................................... 16
4. Memory Operating Frequencies ......................................................... 17
5. LAN Connector LED States................................................................ 29
6. Effects of Pressing the Power Switch .................................................. 32
7. Power States and Targeted System Power........................................... 33
8. Wake-up Devices and Events ............................................................ 34
9. System Memory Map ....................................................................... 41
10. DMA Channels................................................................................. 41
11. I/O Map ......................................................................................... 42
12. PCI Configuration Space Map ............................................................ 43
13. Interrupts ...................................................................................... 44
14. PCI Interrupt Routing Map ................................................................ 45
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Intel Desktop Board D945GCL Technical Product Specification
15. Component-side Connectors and Headers Shown in Figure 13................ 49
16. Front Panel Audio Header ................................................................. 50
17. Chassis Intrusion Header.................................................................. 50
18. Serial ATA Connectors...................................................................... 50
19. Processor Fan Header ...................................................................... 50
20. Front and Rear Chassis Fan Headers .................................................. 50
21. Main Power Connector...................................................................... 51
22. Processor Core Power Connector........................................................ 51
23. Auxiliary Front Panel Power/Sleep LED Header..................................... 52
24. Front Panel Header .......................................................................... 53
25. States for a One-Color Power LED...................................................... 54
26. States for a Two-Color Power LED...................................................... 54
27. BIOS Setup Configuration Jumper Settings.......................................... 56
28. DC Loading Characteristics ............................................................... 59
29. Fan Header Current Capability........................................................... 60
30. Thermal Considerations for Components ............................................. 63
31. Environmental Specifications............................................................. 64
32. BIOS Setup Program Menu Bar.......................................................... 66
33. BIOS Setup Program Function Keys.................................................... 66
34. Boot Device Menu Options ................................................................ 70
35. Supervisor and User Password Functions............................................. 72
36. Beep Codes .................................................................................... 73
37. BIOS Error Messages ....................................................................... 73
38. Port 80h POST Code Ranges.............................................................. 74
39. Port 80h POST Codes ....................................................................... 75
40. Typical Port 80h POST Sequence........................................................ 78
41. Safety Regulations........................................................................... 79
42. Lead-Free Board Markings ................................................................ 84
43. EMC Regulations ............................................................................. 85
44. Product Certification Markings ........................................................... 86
viii
1 Product Description
What This Chapter Contains
1.1 Overview........................................................................................ 10
1.2 Online Support................................................................................ 15
1.3 Processor ....................................................................................... 15
1.4 System Memory .............................................................................. 16
®
1.5 Intel 945G Chipset......................................................................... 20
1.6 PCI Express* Connectors.................................................................. 24
1.7 Legacy I/O Controller....................................................................... 25
1.8 Audio Subsystem............................................................................. 26
1.9 LAN Subsystem............................................................................... 28
1.10 Hardware Management Subsystem .................................................... 30
1.11 Power Management ......................................................................... 32
9
Intel Desktop Board D945GCL Technical Product Specification
1.1 Overview
1.1.1 Feature Summary
Table 1 summarizes the major features of the board.
Table 1. Feature Summary
Form Factor microATX (9.60 inches by 9.60 inches [243.84 millimeters by
243.84 millimeters])
Processor Support for the following:
®
• Intel Core™2 Duo processor in an LGA775 socket with a 1066 or 800 MHz
system bus
® ®
• Intel Pentium D processor in an LGA775 socket with an 800 or 533 MHz
system bus
® ®
• Intel Pentium 4 processor in an LGA775 socket with an 800 or 533 MHz
system bus
® ®
• Intel Celeron D processor in an LGA775 socket with a 533 MHz system bus
• Two 240-pin DDR2 SDRAM Dual Inline Memory Module (DIMM) sockets
Memory
• Support for DDR2 667, DDR2 533, or DDR2 400 MHz DIMMs
• Support for up to 4 GB of system memory
®
Chipset
Intel 945G Chipset, consisting of:
®
• Intel 82945G Graphics Memory Controller Hub (GMCH)
®
• Intel 82801GB I/O Controller Hub (ICH7)
®
Video Intel GMA950 onboard graphics subsystem
Audio 6-channel (5.1) audio subsystem with three analog audio outputs using the
Sigmatel* 9220 audio codec
Legacy I/O Control Legacy I/O controller for diskette drive, serial, parallel, and PS/2* ports
USB Support for USB 2.0 devices
• Eight USB ports
Peripheral
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
®
LAN Support 10/100 Mbits/sec LAN subsystem using the Intel 82562G Platform LAN Connect
(PLC) device
®
• Intel BIOS (resident in the SPI Flash device)
BIOS
• Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,
and SMBIOS
• Two PCI Conventional* bus connectors
Expansion
Capabilities • One PCI Express* x1 bus add-in card connector
• One PCI Express x16 bus add-in card connector
continued
10
Product Description
Table 1. Feature Summary (continued)
• Support for PCI Local Bus Specification Revision 2.3
Instantly Available
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
• Hardware monitoring and fan control ASIC
Hardware Monitor
Subsystem
• Voltage sense to detect out of range power supply voltages
• Thermal sense to detect out of range thermal values
• Three fan headers
• Three fan sense inputs used to monitor fan activity
• Fan speed control
For information about Refer to
Available configurations for the board Section 1.2, page 15
11
Intel Desktop Board D945GCL Technical Product Specification
1.1.2 Board Layout
Figure 1 shows the location of the major components.
Figure 1. Board Components
Table 2 lists the components identified in Figure 1.
12
Product Description
Table 2. Board Components Shown in Figure 1
Item/callout
from Figure 1 Description
A Front panel audio header
B
PCI Conventional bus add-in card connectors [2]
C
PCI Express x16 bus add-in card connector
D
Back panel connectors
E
Processor core power connector
F Rear chassis fan header
G
LGA775 processor socket
H
Intel 82945G GMCH
I
Processor fan header
J
DIMM sockets
K Main Power connector
L Diskette drive connector
M
Parallel ATE IDE connector
N
Battery
O
Front chassis fan header
P
BIOS Setup configuration jumper block
Q Chassis intrusion header
R
Serial ATA connectors [4]
S
Auxiliary front panel power LED header
T
Front panel header
U
Front panel USB headers [2]
V Intel 82801GB I/O Controller Hub (ICH7)
W Speaker
X
PCI Express x1 bus add-in card connector
13
Intel Desktop Board D945GCL Technical Product Specification
1.1.3 Block Diagram
Figure 2 is a block diagram of the major functional areas.
PCI Express x1 Interface
Back Panel/Front Panel
USB
USB Ports
PCI Express x1 Slot 1
Serial Port
Legacy
Parallel Port
Parallel ATA Parallel ATA
I/O
IDE Connector IDE Interface PS/2 Mouse
Controller
PS/2 Keyboard
System Bus
LGA775 Processor Diskette Drive
(1066/800/533
LPC
Socket Connector
MHz) Bus
Intel 945G Chipset
PCI Express
x16 Interface
Intel 82945G
Intel 82801GB Serial Peripheral
Graphics and
I/O Controller Hub Interface (SPI)
PCI Express
Memory Controller
(ICH7) Flash Device
x16
Hub (GMCH)
Connector
VGA
Display Interface
Port
Dual-Channel
Memory Bus
Channel A
SMBus
DIMM
10/100 LAN
LAN PLC Connector
Channel B
DIMM
Serial ATA
Serial ATA IDE
IDE Interface
Connectors (4)
Line Out
PCI Bus
Mic In
Audio
Line In/Retasking Jack
PCI Slot 1
Codec
Line Out/Retasking Jack
PCI Slot 2
SMBus
Mic In/Retasking Jack
Hardware Monitoring
and Fan Control ASIC
= connector or socket
OM18521
Figure 2. Block Diagram
14
DMI Interconnect
High Definition Audio Link
LAN Connect
Interface
Product Description
1.2 Online Support
To find information about… Visit this World Wide Web site:
®
Intel Desktop Board D945GCL under http://www.intel.com/design/motherbd
“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/cl/cl_available.htm
Board D945GCL
Processor data sheets http://www.intel.com/design/litcentr
ICH7 addressing http://developer.intel.com/products/chipsets
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
Supported video modes http://www.intel.com/design/motherbd/cl/cl_documentation.htm
1.3 Processor
The board is designed to support the following processors:
• Intel Core 2 Duo processor in an LGA775 socket with a 1066 or 800 MHz
system bus
• Intel Pentium D processor in an LGA775 processor socket with an 800 or 533 MHz
system bus
• Intel Pentium 4 processor in an LGA775 processor socket with an 800 or 533 MHz
system bus
• Intel Celeron D processor in an LGA775 processor socket with a 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 http://www.intel.com/design/motherbd/cl/cl_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 NOTE
#
Use only ATX12V-compliant power supplies.
For information about Refer to
Power supply connectors Section 2.7.2.1, page 51
15
Intel Desktop Board D945GCL Technical Product Specification
1.4 System Memory
The board has two DIMM sockets 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.
• 4 GB maximum total system memory. Refer to Section 2.1.1 on page 39 for
information on the total amount of addressable memory.
• Minimum total system memory: 128 MB
• Non-ECC DIMMs
• Serial Presence Detect
• DDR2 667, DDR2 533, 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 3 lists the supported DIMM configurations.
Table 3. Supported Memory Configurations
SDRAM Organization Number of
DIMM Capacity Configuration SDRAM Density Front-side/Back-side SDRAM 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).
16
Product Description
NOTE
�
Regardless of the DIMM type used, the memory frequency will either be equal to or
less than the processor system bus frequency. For example, if DDR2 667 memory is
used with a 533 MHz system bus frequency processor, the memory will operate at
533 MHz. Table 4 lists the resulting operating memory frequencies based on the
combination of DIMMs and processors.
Table 4. Memory Operating Frequencies
DIMM Type Processor system bus frequency Resulting memory frequency
DDR2 400 533 MHz 400 MHz
DDR2 400 800 MHz 400 MHz
DDR2 400 1066 MHz 400 MHz
DDR2 533 533 MHz 533 MHz
DDR2 533 800 MHz 533 MHz
DDR2 533 1066 MHz 533 MHz
DDR2 667 533 MHz 533 MHz
DDR2 667 800 MHz 667 MHz
DDR2 667 1066 MHz 667 MHz
17
Intel Desktop Board D945GCL Technical Product Specification
1.4.1 Memory Configurations
The Intel 82945G GMCH 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 3 illustrates the memory channel and DIMM configuration.
Figure 3. Memory Channel and DIMM Configuration
1.4.1.1 Dual Channel (Interleaved) Mode Configurations
Figure 4 shows a dual channel configuration using two DIMMs. In this example, the
DIMM sockets are populated with identical DIMMs.
Figure 4. Dual Channel (Interleaved) Mode Configuration with Two DIMMs
18
Product Description
1.4.1.2 Single Channel (Asymmetric) Mode Configurations
NOTE
�
Dual channel (Interleaved) mode configurations provide the highest memory
throughput.
Figure 5 shows a single channel configuration using one DIMM. In this example, only
the Channel A is populated. Channel B is not populated.
Figure 5. Single Channel (Asymmetric) Mode Configuration with One DIMM
Figure 6 shows a single channel configuration using two DIMMs. In this example, the
capacity of the DIMM in Channel A does not equal the capacity of the DIMM in
Channel B.
Figure 6. Single Channel (Asymmetric) Mode Configuration with Two DIMMs
19
Intel Desktop Board D945GCL Technical Product Specification
®
1.5 Intel 945G Chipset
The Intel 945G chipset consists of the following devices:
• Intel 82945G 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 945G chipset http://developer.intel.com/
Resources used by the chipset Chapter 2
1.5.1 Intel 945G Graphics Subsystem
The Intel 945G chipset contains two separate, mutually exclusive graphics options.
Either the GMA950 graphics controller (contained within the 82945G GMCH) is used, or
a PCI Express x16 add-in card can be used. When a PCI Express x16 add-in card is
installed, the GMA950 graphics controller is disabled.
®
1.5.1.1 Intel GMA950 Graphics Controller
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
20
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)
⎯ DDC2B compliant interface with Advanced Digital Display 2 or 2+
(ADD2/ADD2+) cards, support for TV-out/TV-in and DVI digital display
connections
⎯ Supports flat panels up to 2048 x 1536 at 60Hz or digital CRT/HDTV at
1920 x 1080 at 85 Hz (with ADD2/ADD2+)
⎯ Two multiplexed DVO port interfaces with 200 MHz pixel clocks using an
ADD2/ADD2+ card
• Dynamic Video Memory Technology (DVMT) support up to 224 MB
®
• Intel Zoom Utility
For information about Refer to
Obtaining graphics software and utilities Section 1.2, page 15
1.5.1.2 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.
21
Intel Desktop Board D945GCL Technical Product Specification
1.5.1.3 Advanced Digital Display (ADD2/ADD2+) Card Support
The GMCH routes two multiplexed DVO ports that are each capable of driving up to a
200 MHz pixel clock to the PCI Express x16 connector. The DVO ports can be paired
for a dual channel configuration to support up to a 400 MHz pixel clock. When an
ADD2/ADD2+ card is detected, the Intel GMA950 graphics controller is enabled and
the PCI Express x16 connector is configured for DVO mode. DVO mode enables the
DVO ports to be accessed by the ADD2/ADD2+ card. An ADD2/ADD2+ card can
either be configured to support simultaneous display with the primary VGA display or
can be configured to support dual independent display as an extended desktop
configuration with different color depths and resolutions. ADD2/ADD2+ cards can be
designed to support the following configurations:
• TV-Out (composite video)
• Transition Minimized Differential Signaling (TMDS) for DVI 1.0
• Low Voltage Differential Signaling (LVDS)
• Single device operating in dual channel mode
• VGA output
• HDTV output
1.5.1.4 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 15
1.5.2 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 12, page 47
The location of the front panel USB headers Figure 13, page 48
22
Product Description
1.5.3 IDE Support
The board provides five IDE interface connectors:
• One parallel ATA IDE connector that supports two devices
• Four serial ATA IDE connectors that support one device per connector
1.5.3.1 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.
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 13, page 48
1.5.3.2 Serial ATA Interfaces
The ICH7’s Serial ATA controller offers four 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 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.
23
Intel Desktop Board D945GCL Technical Product Specification
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/
For information about Refer to
The location of the Serial ATA IDE connectors Figure 13, page 48
1.5.4 Real-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.
1.6 PCI Express* Connectors
The board provides the following PCI Express connectors:
• One PCI Express x16 connector supporting simultaneous transfer speeds up to
4 GBytes/sec of peak bandwidth per direction and up to 8 GBytes/sec concurrent
bandwidth
• One PCI Express x1 connector. The x1 interface supports simultaneous transfer
speeds up to 250 Mbytes/sec of peak bandwidth per direction and up to
500 MBytes/sec concurrent bandwidth
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 include
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
24
Product Description
1.7 Legacy I/O Controller
The legacy 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 legacy I/O controller.
1.7.1 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 12, page 47
1.7.2 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 12, page 47
1.7.3 Diskette Drive Controller
The legacy 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 Figure 13, page 48
1.7.4 Keyboard 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 12, page 47
25
Intel Desktop Board D945GCL Technical Product Specification
1.8 Audio Subsystem
The board supports the Intel High Definition audio subsystem based on the
Sigmatel 9220 audio codec. The audio subsystem supports the following features:
• Advanced jack sense for the back panel audio jacks that enables the audio codec to
recognize the device that is connected to an audio port. The back panel audio
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 back panel jacks
• Line out and Mic in functions for front panel audio jacks
• A signal-to-noise (S/N) ratio of 95 dB
1.8.1 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 15
1.8.2 Audio Connectors
The board contains audio connectors/headers on both the back panel and the
component side of the board. The front panel audio header provides mic in and line
out signals for the front panel.
For information about Refer to
The location of the front panel audio header Figure 13, page 48
The signal names of the front panel audio header Table 16, page 50
The back panel audio connectors Section 2.7.1, page 47
26
Product Description
1.8.3 6-Channel (5.1) Audio Subsystem
The 6-channel (5.1) audio subsystem includes the following:
• Intel 82801GB I/O Controller Hub (ICH7)
• Sigmatel 9220 audio codec
• Microphone input that supports a single dynamic, condenser, or electret
microphone
The back panel audio connectors are configurable through the audio device drivers.
The available configurable audio ports are shown in Figure 7.
Front Panel Audio Connectors
Back Panel Audio Connectors
[Routed from Front Panel Audio Header]
Line In/Retasking Jack
[Blue]
Line Out/ Mic In/
Retasking Jack
Retasking Jack
Line Out/Retasking Jack
[Green] [Pink]
[Green]
Mic In/Retasking Jack
[Pink]
OM18469
Figure 7. Front/Back Panel Audio Connector Options
For information about Refer to
The back panel audio connectors Section 2.7.1, page 47
27
Intel Desktop Board D945GCL Technical Product Specification
1.9 LAN Subsystem
The LAN subsystem consists of the following:
• Intel 82801GB ICH7
• Intel 82562G Platform LAN Conneect (PLC) device for 10/100 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
1.9.1 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 15
®
1.9.2 Intel 82562G Physical Layer Interface Device
The Intel 82562G provides the following functions:
• 10/100 Ethernet LAN connectivity
• Full device driver compatibility
• Programmable transit threshold
• Configuration EEPROM that contains the MAC address
28
Product Description
1.9.2.1 RJ-45 LAN Connector with Integrated LEDs
Two LEDs are built into the RJ-45 LAN connector (shown in Figure 8).
Figure 8. LAN Connector LED Locations
Table 5 describes the LED states when the board is powered up and the
10/100 Mbits/sec LAN subsystem is operating.
Table 5. LAN Connector LED States
LED LED Color LED State Condition
Off LAN link is not established.
A Green On LAN link is established.
Blinking LAN activity is occurring.
Off 10 Mbits/sec data rate is selected.
B Yellow
On 100 Mbits/sec data rate is selected.
29
Intel Desktop Board D945GCL Technical Product Specification
1.10 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:
• Chassis intrusion detection
• Fan monitoring and control (through the hardware monitoring and fan control
ASIC)
• Thermal and voltage monitoring
1.10.1 Hardware 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 headers and sensors for thermal monitoring Figure 9, page 31
1.10.2 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.
1.10.3 Fan Monitoring
®
Fan monitoring can be implemented using Intel Desktop Utilities or third-party
software. The level of monitoring and control is dependent on the hardware
monitoring ASIC used with the board.
For information about Refer to
The functions of the fan headers Section 1.11.2.2, page 35
30
Product Description
1.10.4 Thermal Monitoring
Figure 9 shows the location of the sensors and fan headers.
Item Description
A Thermal diode, located on processor die
B Ambient temperature sensor, internal to hardware monitoring and fan control ASIC
C Remote ambient temperature sensor
D Processor fan
E Rear chassis fan
F Front chassis fan
Figure 9. Thermal Sensors and Fan Headers
31
Intel Desktop Board D945GCL Technical Product Specification
1.11 Power Management
Power management is implemented at several levels, including:
• Software support through Advanced Configuration and Power Interface (ACPI)
• Hardware support:
⎯ Power connector
⎯ Fan headers
⎯ 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
1.11.1 ACPI
ACPI gives the operating system direct control over the power management and Plug
and Play functions of a computer. The use of ACPI with this board 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 8 on page 34)
• Support for a front panel power and sleep mode switch
Table 6 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.
Table 6. Effects of Pressing the Power Switch
If the system is in this …and the power switch is
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)
32
Product Description
1.11.1.1 System 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.
Table 7 lists the power states supported by the board along with the associated
system power targets. See the ACPI specification for a complete description of the
various system and power states.
Table 7. Power States and Targeted System Power
Processor Targeted System
(Note 1)
Global States Sleeping States States Device States Power
G0 – working S0 – working C0 – working D0 – working state. Full power > 30 W
state
G1 – sleeping S1 – Processor C1 – stop D1, D2, D3 – device 5 W < power < 52.5 W
state stopped grant specification
specific.
(Note 2)
G1 – sleeping S3 – Suspend to No power D3 – no power Power < 5 W
state RAM. Context except for wake-up
saved to RAM. logic.
(Note 2)
G1 – sleeping S4 – Suspend to No power D3 – no power Power < 5 W
state disk. Context except for wake-up
saved to disk. logic.
(Note 2)
G2/S5 S5 – Soft off. No power D3 – no power Power < 5 W
Context not saved. except for wake-up
Cold boot is 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
except when performed safely.
AC power is
provided by battery
disconnected
or external source.
from the
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.
1.11.1.2 One-Watt Standby
In 2001, the U.S. government issued an executive order requiring a reduction in
power for appliances and personal computers. This board meets that requirement by
operating at 1 W (or less) in S5 (Standby) mode. One-Watt operation applies only to
the S5 state when the computer is turned off, but still connected to AC power. One-
Watt operation does not apply to the S3 (Suspend to RAM) or S4 (Suspend to disk)
states. Newer energy-efficient power supplies using less than 0.5 W (in Standby
mode) may also be needed to achieve this goal.
33
Intel Desktop Board D945GCL Technical Product Specification
1.11.1.3 Wake-up Devices and Events
Table 8 lists the devices or specific events that can wake the computer from specific
states.
Table 8. Wake-up Devices and Events
These devices/events can wake up the computer… …from this state
(Note)
LAN S1, S3, S4, S5
Modem (back panel Serial Port A) S1, S3
(Note)
PME# signal S1, S3, S4, S5
Power switch S1, S3, S4, S5
PS/2 devices S1, S3
RTC alarm S1, S3, S4, S5
USB S1, S3
WAKE# signal 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.
1.11.2 Hardware 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 board provides several power management hardware features, including:
• Power connector
• Fan headers
• 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.
34
Product Description
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.
1.11.2.1 Power 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 main power connector Figure 13, page 48
The signal names of the main power connector Table 21, page 51
1.11.2.2 Fan Headers
The function/operation of the fan headers 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 header is wired to a fan tachometer input of the hardware monitoring and
fan control ASIC.
• All fan headers support closed-loop fan control that can adjust the fan speed or
switch the fan on or off as needed.
• All fan headers have a +12 V DC connection.
For information about Refer to
The location of the fan headers Figure 13, page 48
The location of the fan headers and sensors for thermal monitoring Figure 9, page 31
The signal names of the processor fan header Table 19, page 50
The signal names of the chassis fan headers Table 20, page 50
35
Intel Desktop Board D945GCL Technical Product Specification
1.11.2.3 LAN 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. Depending on the LAN implementation, the board
supports LAN wake capabilities with ACPI in the following ways:
• The PCI Express WAKE# signal
• The PCI Conventional bus PME# signal for PCI 2.3 compliant LAN designs
• The onboard LAN subsystem
1.11.2.4 Instantly 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 board 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 8 on page 34 lists the devices and events that can
wake the computer from the S3 state.
The board supports 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 2.3 compliant add-in cards, PCI Express add-in cards, and drivers.
1.11.2.5 Resume 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
36
Product Description
1.11.2.6 Wake 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.
1.11.2.7 Wake from PS/2 Devices
PS/2 device activity wakes the computer from an ACPI S1 or S3 state.
1.11.2.8 PME# 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).
1.11.2.9 WAKE# 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.
1.11.2.10 +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 10 shows the location of the standby power
indicator LED.
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.
Figure 10. Location of the Standby Power Indicator LED
37
Intel Desktop Board D945GCL Technical Product Specification
38
2 Technical Reference
What This Chapter Contains
2.1 Memory Resources .......................................................................... 39
2.2 DMA Channels................................................................................. 41
2.3 Fixed I/O Map................................................................................. 42
2.4 PCI Configuration Space Map ............................................................ 43
2.5 Interrupts ...................................................................................... 44
2.6 PCI Conventional Interrupt Routing Map ............................................. 45
2.7 Connectors and Headers................................................................... 46
2.8 Jumper Block.................................................................................. 56
2.9 Mechanical Considerations ................................................................ 57
2.10 Electrical Considerations................................................................... 59
2.11 Thermal Considerations.................................................................... 61
2.12 Reliability ....................................................................................... 63
2.13 Environmental ................................................................................ 64
2.1 Memory Resources
2.1.1 Addressable 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 (SPI Flash), 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/ SPI Flash (2 MB)
• Local APIC (19 MB)
• Digital Media Interface (40 MB)
• Front side bus interrupts (17 MB)
• PCI Express configuration space (256 MB)
• GMCH base address registers, internal graphics ranges, PCI Express ports (up to
512 MB)
• Memory-mapped I/O that is dynamically allocated for PCI Conventional and PCI
Express
add-in cards
The amount of installed memory that can be used will vary based on add-in cards and
BIOS settings. Figure 11 shows a schematic of the system memory map. All installed
system memory can be used when there is no overlap of system addresses.
39
Intel Desktop Board D945GCL Technical Product Specification
4 GB
Top of System Address Space
FLASH
APIC ~20 MB
Reserved
PCI Memory Range -
contains PCI, chipsets,
1 MB
Direct Media Interface 0FFFFFH
Upper BIOS
(DMI), and ICH ranges
area (64 KB)
(approximately 750 MB)
0F0000H
960 KB
0EFFFFH
Lower BIOS
Top of usable area
DRAM (memory (64 KB;
visible to the
16 KB x 4)
0E0000H
operating
896 KB
system)
0DFFFFH
Add-in Card
BIOS and
Buffer area
(128 KB;
16 KB x 8)
0C0000H
DRAM 768 KB
0BFFFFH
Range
Standard PCI/
ISA Video
Memory (SMM
1 MB
Memory)
128 KB
640 KB
0A0000H
DOS 640 KB
09FFFFH
Compatibility
DOS area
Memory
(640 KB)
00000H
0 MB 0 KB
OM18390
Figure 11. Detailed System Memory Address Map
40
Technical Reference
2.1.2 Memory Map
Table 9 lists the system memory map.
Table 9. 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
2.2 DMA Channels
Table 10. 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
41
Intel Desktop Board D945GCL Technical Product Specification
2.3 Fixed I/O Map
Table 11. I/O Map
Address (hex) Size Description
0000 - 00FF 256 bytes Used by the Desktop Board D945GCL. Refer to the ICH7
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 ICH7 address aliasing. The
ICH7 data sheet provides more information on address aliasing.
For information about Refer to
Obtaining the ICH7 data sheet Section 1.2, page 15
42
Technical Reference
2.4 PCI Configuration Space Map
Table 12. PCI Configuration Space Map
Bus Device Function
Number (hex) Number (hex) Number (hex) Description
00 00 00 Memory controller of Intel 82945G component
(Note 1)
00 01 00 PCI Express x16 graphics port
00 02 00 Integrated graphics controller
00 1B 00 Intel High Definition Audio Controller
00 1C 00 PCI Express port 1
00 1C 01 PCI Express port 2
00 1C 02 PCI Express port 3
00 1C 03 PCI Express port 4
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 PCI Conventional bus connector 1
(Note 2)
01 00 PCI Conventional bus connector 2
(Note 2)
08 00 Intel 82562G 10/100 Mbits/sec LAN PLC
01 00 00 PCI Express video controller (if present)
Notes:
1. Present only when a PCI Express x16 graphics card is installed.
2. Bus number is dynamic and can change based on add-in cards used.
43
Intel Desktop Board D945GCL Technical Product Specification
2.5 Interrupts
The interrupts can be routed through either the Programmable Interrupt Controller
(PIC) or the Advanced Programmable Interrupt Controller (APIC) portion of the ICH7
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 13. 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
(Note 1)
4 COM1
5 User available
6 Diskette drive
(Note 1)
7 LPT1
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 Parallel ATA/Serial ATA – Legacy Mode (if present, else user available)
15 Secondary Parallel ATA/Serial ATA – Legacy Mode (if present, else user available)
(Note 2)
16 User available (through PIRQA)
(Note 2)
17 User available (through PIRQB)
(Note 2)
18 User available (through PIRQC)
(Note 2)
19 User available (through PIRQD)
(Note 2)
20 User available (through PIRQE)
(Note 2)
21 User available (through PIRQF)
(Note 2)
22 User available (through PIRQG)
(Note 2)
23 User available (through PIRQH)
Notes:
1. Default, but can be changed to another IRQ.
2. Available in APIC mode only.
44
Technical Reference
2.6 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 ICH7 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
14 shows an example of how the PIRQ signals are routed.
Table 14. PCI Interrupt Routing Map
ICH7 PIRQ Signal Name
PCI Interrupt Source
PIRQA PIRQB PIRQC PIRQD PIRQE PIRQF PIRQG PIRQH
PCI bus connector 1 INTD INTA INTB INTC
PCI bus connector 2 INTC INTB INTA INTD
ICH7 LAN INTA
NOTE
�
In PIC mode, the ICH7 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 13 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.
45
Intel Desktop Board D945GCL Technical Product Specification
2.7 Connectors and Headers
CAUTION
Only the following connectors have overcurrent protection: back panel USB, front
panel USB, and PS/2.
The other internal connectors/headers 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/headers 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 and headers. The connectors and
headers can be divided into these groups:
• Back panel connectors (see page 47)
• Component-side connectors and headers (see page 48)
46
Technical Reference
2.7.1 Back Panel Connectors
Figure 12 shows the location of the back panel connectors.
A
C H
F
B D E G IJ
OM18515
Item Description
A PS/2 mouse port
B PS/2 keyboard port
C Parallel port
D Serial port
E VGA port
F LAN
G USB ports [4]
H Audio line in
I Mic in
J Audio line out
Figure 12. Back Panel 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.
47
Intel Desktop Board D945GCL Technical Product Specification
2.7.2 Component-side Connectors and Headers
Figure 13 shows the locations of the component-side connectors and headers.
Figure 13. Component-side Connectors and Headers
48
Technical Reference
Table 15 lists the component-side connectors and headers identified in Figure 13.
Table 15. Component-side Connectors and Headers Shown in Figure 13
Item/callout
from Figure 13 Description
A Front panel audio header
B
PCI Conventional bus add-in card connector 2
C
PCI Conventional bus add-in card connector 1
D
PCI Express x16 bus add-in card connector
E
Processor core power connector
F Rear chassis fan header
G
Processor fan header
H
Main power connector
I
Diskette drive connector
J
Parallel ATA IDE connector
K Front chassis fan header
L Serial ATA connector 3
M
Serial ATA connector 2
N
Serial ATA connector 0
O
Auxiliary front panel power LED header
P
Front panel header
Q Serial ATA connector 1
R
Front panel USB header
S
Chassis intrusion header
T
Front panel USB header
U
PCI Express x1 bus add-in card connector
49
Intel Desktop Board D945GCL Technical Product Specification
Table 16. Front Panel Audio Header
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 header is colored yellow.
Table 17. Chassis Intrusion Header
Pin Signal Name
1 Intruder
2 Ground
Table 18. Serial ATA Connectors
Pin Signal Name
1 Ground
2 TXP
3 TXN
4 Ground
5 RXN
6 RXP
7 Ground
Table 19. Processor Fan Header
Pin Signal Name
1 Ground
2 +12 V
3 FAN_TACH
4 FAN_CONTROL
Table 20. Front and Rear Chassis Fan Headers
Pin Signal Name
1 FAN_CONTROL
2 +12 V
3 FAN_TACH
50
Technical Reference
2.7.2.1 Power Supply Connectors
The board has 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.
• Processor core 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.
INTEGRATOR’S NOTE
#
When using high wattage PCI Express x16 graphics cards, use a power supply with a
2 x 12 main power cable. The 2 x 12 main power cable can provide up to 144 W of
power from the +12 V rail.
Table 21. 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
6 +5 V 18 Ground
7 Ground 19 Ground
8 PWRGD (Power Good) 20 No connect
9 +5 V (Standby) 21 +5 V
10 +12 V 22 +5 V
(Note) (Note)
11 +12 V 23 +5 V
(Note) (Note)
12 2 x 12 connector detect 24 Ground
Note: When using a 2 x 10 power supply cable, this pin will be unconnected.
Table 22. Processor Core Power Connector
Pin Signal Name Pin Signal Name
1 Ground 2 Ground
3 +12 V 4 +12 V
51
Intel Desktop Board D945GCL Technical Product Specification
2.7.2.2 Add-in Card Connectors
The board has the following add-in card connectors:
• One PCI Express x16 connector supporting simultaneous transfer speeds up to
4 GBytes/sec of peak bandwidth per direction and up to 8 GBytes/sec concurrent
bandwidth
• One PCI Express x1 connector. The x1 interface supports simultaneous transfer
speeds up to 250 Mbytes/sec of peak bandwidth per direction and up to
500 MBytes/sec concurrent bandwidth
• PCI Conventional (rev 2.3 compliant) bus: two PCI Conventional bus add-in card
connectors. The SMBus is routed to PCI Conventional bus connector 2 only (ATX
expansion slot 6). PCI Conventional bus add-in cards with SMBus support can
access sensor data and other information residing on the board.
Note the following considerations for the PCI Conventional bus connectors:
• All of the PCI Conventional bus connectors are bus master capable.
• SMBus signals are routed to PCI Conventional bus connector 2. This enables PCI
Conventional bus add-in boards with SMBus support to access sensor data on the
boards. The specific SMBus signals are as follows:
⎯ The SMBus clock line is connected to pin A40.
⎯ The SMBus data line is connected to pin A41.
NOTE
�
The PCI Express x16 connector is configured to support only a PCI Express x1 link
when the Intel GMA950 graphics controller is enabled.
2.7.2.3 Auxiliary Front Panel Power/Sleep LED Header
Pins 1 and 3 of this header duplicate the signals on pins 2 and 4 of the front panel
header.
Table 23. Auxiliary Front Panel Power/Sleep LED Header
Pin Signal Name In/Out Description
1 HDR_BLNK_GRN Out Front panel green LED
2 Not connected
3 HDR_BLNK_YEL Out Front panel yellow LED
52
Technical Reference
2.7.2.4 Front Panel Header
This section describes the functions of the front panel header. Table 24 lists the signal
names of the front panel header. Figure 14 is a connection diagram for the front panel
header.
Table 24. Front Panel Header
In/ In/
Pin Signal Out Description Pin Signal Out Description
Hard Drive Activity LED Power LED
[Yellow] [Green]
1 HD_PWR Out Hard disk LED pull-up 2 HDR_BLNK_ Out Front panel green
to +5 V GRN LED
3 HAD# Out Hard disk active LED 4 HDR_BLNK_ Out Front panel yellow
YEL LED
Reset Switch On/Off Switch
[Purple] [Red]
5 Ground Ground 6 FPBUT_IN In Power switch
7 FP_RESET# In Reset switch 8 Ground Ground
Power Not Connected
9 +5 V Power 10 N/C Not connected
+5 V DC
N/C
9
87
Power Reset
Switch Switch
65
4 3 -
Hard Drive
Activity LED
2 1
+
Dual- Single-
colored colored
Power LED Power LED
OM18331
Figure 14. Connection Diagram for Front Panel Header
53
-
+
+
-
Intel Desktop Board D945GCL Technical Product Specification
2.7.2.4.1 Hard Drive Activity LED Header [Yellow]
Pins 1 and 3 [Yellow] can be connected to an LED to provide a visual indicator that
data is being read from or written to a hard drive. Proper LED function requires one of
the following:
• A Serial ATA hard drive connected to an onboard Serial ATA connector
• An IDE hard drive connected to an onboard IDE connector
2.7.2.4.2 Reset Switch Header [Purple]
Pins 5 and 7 [Purple] can be connected to a momentary single pole, single throw
(SPST) type switch that is normally open. When the switch is closed, the board resets
and runs the POST.
2.7.2.4.3 Power/Sleep LED Header [Green]
Pins 2 and 4 [Green] can be connected to a one- or two-color LED. Table 25 shows
the possible states for a one-color LED. Table 26 shows the possible states for a two-
color LED.
Table 25. States for a One-Color Power LED
LED State Description
Off Power off/sleeping
Steady Green Running
Table 26. States for a Two-Color Power LED
LED State Description
Off Power off
Steady Green Running
Steady Yellow Sleeping
� NOTE
The colors listed in Table 25 and Table 26 are suggested colors only. Actual LED
colors are product- or customer-specific.
2.7.2.4.4 Power Switch Header [Red]
Pins 6 and 8 [Red] can be connected to a front panel momentary-contact power
switch. The switch must pull the SW_ON# pin to ground for at least 50 ms to signal
the power supply to switch on or off. (The time requirement is due to internal
debounce circuitry on the board.) At least two seconds must pass before the power
supply will recognize another on/off signal.
54
Technical Reference
2.7.2.5 Front Panel USB Headers
Figure 15 is a connection diagram for the front panel USB headers.
INTEGRATOR’S NOTES
#
• The +5 V DC power on the USB headers is fused.
• Pins 1, 3, 5, and 7 comprise one USB port.
• Pins 2, 4, 6, and 8 comprise one USB port.
• Use only a front panel USB connector that conforms to the USB 2.0 specification
for high-speed USB devices.
Power Power
1 2
(+5 V DC) (+5 V DC)
D- D-
One One
3 4
USB USB
Port Port
D+ D+
5 6
7 Ground
8
Ground
10
Key (no pin)
No connect
OM18317
Figure 15. Connection Diagram for Front Panel USB Headers
55
Intel Desktop Board D945GCL Technical Product Specification
2.8 Jumper Block
CAUTION
Do not move the jumper with the power on. Always turn off the power and unplug the
power cord from the computer before changing a jumper setting. Otherwise, the
board could be damaged.
Figure 16 shows the location of the jumper block. The jumper block determines the
BIOS Setup program’s mode. Table 27 describes the jumper settings for the three
modes: normal, configure, and recovery. When the jumper is set to configure mode
and the computer is powered-up, the BIOS compares the processor version and the
microcode version in the BIOS and reports if the two match.
Figure 16. Location of the Jumper Block
Table 27. BIOS Setup Configuration Jumper Settings
Function/Mode Jumper Setting Configuration
Normal The BIOS uses current configuration information and
1-2 passwords for booting.
32 1
Configure After the POST runs, Setup runs automatically. The
2-3 maintenance menu is displayed.
32 1
Recovery The BIOS attempts to recover the BIOS configuration. A
None recovery diskette is required.
32 1
56
Technical Reference
2.9 Mechanical Considerations
2.9.1 Form Factor
The board is designed to fit into an ATX- or microATX-form-factor chassis. Figure 17
illustrates the mechanical form factor of the board. Dimensions are given in inches
[millimeters]. The outer dimensions are 9.60 inches by 9.60 inches [243.84
millimeters by 243.84 millimeters]. Location of the I/O connectors and mounting
holes are in compliance with the ATX specification.
Figure 17. Board Dimensions
57
Intel Desktop Board D945GCL Technical Product Specification
2.9.2 I/O Shield
The back panel I/O shield for the board must meet specific dimension and material
requirements. Systems based on this board need the back panel I/O shield to pass
certification testing. Figure 18 shows the I/O shield dimensions. Dimensions are
given in millimeters [inches]. The figures also indicate the position of each cutout.
Additional design considerations for I/O shields relative to chassis requirements are
described in the ATX specification.
NOTE
�
The I/O shield drawing is for reference only. I/O shields compliant with the ATX
chassis specification are available from Intel.
162.3 REF
[6.390]
1.6 – 0.12
[0.063 – 0.005]
20 – 0.254 TYP
[0.787 – 0.10]
159.2 – 0.12
1.55 REF
[0.061]
[6.268 – 0.005]
22.45
[0.884]
8x R 0.5 MIN
7.01
[0.276]
1.00
[0.039]
A
A
0.00
11.81
[0.00]
[0.465]
11.81
14.17
[0.465]
[0.558]
12.04
[0.474]
OM18508
Figure 18. I/O Shield Dimensions
58
0.00
[0.00]
8.81
[0.347]
20.28
[0.799]
26.91
[1.059]
56.31
[2.217]
93.74
[3.690]
113.63
[4.473]
146.88
[5.783]
Technical Reference
2.10 Electrical Considerations
2.10.1 DC Loading
Table 28 lists the DC loading characteristics of the boards. This data is based on a DC
analysis of all active components within the board that impact its power delivery
subsystems. The analysis does not include PCI add-in cards. Minimum values assume
a light load placed on the board that is similar to an environment with no applications
running and no USB current draw. Maximum values assume a load placed on the
board that is similar to a heavy gaming environment with a 500 mA current draw per
USB port. These calculations are not based on specific processor values or memory
configurations but are based on the minimum and maximum current draw possible
from the board’s power delivery subsystems to the processor, memory, and USB
ports.
Use the datasheets for add-in cards, such as PCI, to determine the overall system
power requirements. The selection of a power supply at the system level is dependent
on the system’s usage model and not necessarily tied to a particular processor speed.
Table 28. DC Loading Characteristics
DC Current at:
Mode DC Power +3.3 V +5 V +12 V -12 V +5 VSB
Minimum loading 275 W 3.5 A 12 A 17 A 0 A 0.34 A (S0)
1.00 A (S3)
Maximum loading 500 W 16 A 23 A 29 A 0.20 A 0.34 A (S0)
1.10 A (S3)
2.10.2 Add-in Board Considerations
The boards are designed to provide 2 A (average) of +5 V current for each add-in
board. The total +5 V current draw for both boards is as follows: a fully loaded
D945GCL board (all three expansion slots and the PCI Express x16 slot filled) must not
exceed 8 A.
59
Intel Desktop Board D945GCL Technical Product Specification
2.10.3 Fan Header Current Capability
CAUTION
The processor fan must be connected to the processor fan header, not to a chassis fan
header. Connecting the processor fan to a chassis fan header may result in onboard
component damage that will halt fan operation.
Table 29 lists the current capability of the fan headers.
Table 29. Fan Header Current Capability
Fan Header Maximum Available Current
Processor fan 3.0 A
Front chassis fan 1.5 A
Rear chassis fan 1.5 A
2.10.4 Power Supply Considerations
CAUTION
The +5 V standby line for the power supply must be capable of providing adequate +5
V standby current. 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.
System integrators should refer to the power usage values listed in Table 28 when
selecting a power supply for use with the board.
Additional power required will depend on configurations chosen by the integrator.
The power supply must comply with the following recommendations found in the ATX
form factor specification:
• The potential relation between 3.3 VDC and +5 VDC power rails
• The current capability of the +5 VSB line
• All timing parameters
• All voltage tolerances
60
Technical Reference
2.11 Thermal Considerations
CAUTION
o
A chassis with a maximum internal ambient temperature of 38 C at the processor fan
inlet is a requirement. Use a processor heatsink that provides omni-directional airflow
to maintain required airflow across the processor voltage regulator area.
CAUTION
Failure to ensure appropriate airflow may result in reduced performance of both the
processor and/or voltage regulator or, in some instances, damage to the board. For a
list of chassis that have been tested with Intel desktop boards please refer to the
following website:
http://developer.intel.com/design/motherbd/cooling.htm
All responsibility for determining the adequacy of any thermal or system design
remains solely with the reader. Intel makes no warranties or representations that
merely following the instructions presented in this document will result in a system
with adequate thermal performance.
CAUTION
Ensure that the ambient temperature does not exceed the board’s maximum operating
temperature. Failure to do so could cause components to exceed their maximum case
temperature and malfunction. For information about the maximum operating
temperature, see the environmental specifications in Section 2.13.
CAUTION
Ensure that proper airflow is maintained in the processor voltage regulator circuit.
Failure to do so may result in damage to the voltage regulator circuit. The processor
o
voltage regulator area (item A in Figure 19) can reach a temperature of up to 85 C in
an open chassis.
Figure 19 shows the locations of the localized high temperature zones.
61
Intel Desktop Board D945GCL Technical Product Specification
Item Description
A Processor voltage regulator area
B Processor
C Intel 82945G GMCH
D Intel 82801GB ICH7
Figure 19. Localized High Temperature Zones
62
Technical Reference
Table 30 provides maximum case temperatures for the components that are sensitive
to thermal changes. The operating temperature, current load, or operating frequency
could affect case temperatures. Maximum case temperatures are important when
considering proper airflow to cool the board.
Table 30. Thermal Considerations for Components
Component Maximum Case Temperature
Processor For processor case temperature, see processor datasheets and
processor specification updates
o
Intel 82945G GMCH 99 C (under bias)
o
Intel 82801GB ICH7 110 C (under bias, without heatsink)
o
99 C (under bias, with heatsink)
For information about Refer to
Processor datasheets and specification updates Section 1.2, page 15
2.12 Reliability
The Mean Time Between Failures (MTBF) prediction is calculated using component and
subassembly random failure rates. The calculation is based on the Bellcore Reliability
Prediction Procedure, TR-NWT-000332, Issue 4, September 1991. The MTBF
prediction is used to estimate repair rates and spare parts requirements.
The MTBF data is calculated from predicted data at 55 ºC. The MTBF for the D945GCL
board is 108,165 hours.
63
Intel Desktop Board D945GCL Technical Product Specification
2.13 Environmental
Table 31 lists the environmental specifications for the board.
Table 31. Environmental Specifications
Parameter Specification
Temperature
Non-Operating -40 °C to +70 °C
Operating 0 °C to +55 °C
Shock
Unpackaged 50 g trapezoidal waveform
Velocity change of 170 inches/second²
Packaged Half sine 2 millisecond
Product Weight (pounds) Free Fall (inches) Velocity Change
(inches/sec²)
<20 36 167
21-40 30 152
41-80 24 136
81-100 18 118
Vibration
Unpackaged 5 Hz to 20 Hz: 0.01 g² Hz sloping up to 0.02 g² Hz
20 Hz to 500 Hz: 0.02 g² Hz (flat)
Packaged 5 Hz to 40 Hz: 0.015 g² Hz (flat)
40 Hz to 500 Hz: 0.015 g² Hz sloping down to 0.00015 g² Hz
64
3 Overview of BIOS Features
What This Chapter Contains
3.1 Introduction ................................................................................... 65
3.2 BIOS Flash Memory Organization....................................................... 66
3.3 Resource Configuration .................................................................... 66
3.4 System Management BIOS (SMBIOS)................................................. 67
3.5 BIOS Updates ................................................................................. 68
3.6 Legacy USB Support ........................................................................ 69
3.7 Boot Options................................................................................... 69
3.8 Adjusting Boot Speed....................................................................... 71
3.9 BIOS Security Features .................................................................... 72
3.1 Introduction
The boards use an Intel BIOS that is stored in the Serial Peripheral Interface Flash
Memory (SPI Flash) and can be updated using a disk-based program. The SPI Flash
contains the BIOS Setup program, POST, the PCI auto-configuration utility, and Plug
and Play support.
The BIOS displays a message during POST identifying the type of BIOS and a revision
code. The initial production BIOSs are identified as CL94510J.86A.
When the BIOS Setup configuration jumper is set to configure mode and the computer
is powered-up, the BIOS compares the CPU version and the microcode version in the
BIOS and reports if the two match.
The BIOS Setup program can be used to view and change the BIOS settings for the
computer. The BIOS Setup program is accessed by pressing the
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What they say about us
FANTASTIC RESOURCE
One of our top priorities is maintaining our business with precision, and we are constantly looking for affiliates that can help us achieve our goal. With the aid of GID Industrial, our obsolete product management has never been more efficient. They have been a great resource to our company, and have quickly become a go-to supplier on our list!
Bucher Emhart Glass
EXCELLENT SERVICE
With our strict fundamentals and high expectations, we were surprised when we came across GID Industrial and their competitive pricing. When we approached them with our issue, they were incredibly confident in being able to provide us with a seamless solution at the best price for us. GID Industrial quickly understood our needs and provided us with excellent service, as well as fully tested product to ensure what we received would be the right fit for our company.
Fuji
HARD TO FIND A BETTER PROVIDER
Our company provides services to aid in the manufacture of technological products, such as semiconductors and flat panel displays, and often searching for distributors of obsolete product we require can waste time and money. Finding GID Industrial proved to be a great asset to our company, with cost effective solutions and superior knowledge on all of their materials, it’d be hard to find a better provider of obsolete or hard to find products.
Applied Materials
CONSISTENTLY DELIVERS QUALITY SOLUTIONS
Over the years, the equipment used in our company becomes discontinued, but they’re still of great use to us and our customers. Once these products are no longer available through the manufacturer, finding a reliable, quick supplier is a necessity, and luckily for us, GID Industrial has provided the most trustworthy, quality solutions to our obsolete component needs.
Nidec Vamco
TERRIFIC RESOURCE
This company has been a terrific help to us (I work for Trican Well Service) in sourcing the Micron Ram Memory we needed for our Siemens computers. Great service! And great pricing! I know when the product is shipping and when it will arrive, all the way through the ordering process.
Trican Well Service
GO TO SOURCE
When I can't find an obsolete part, I first call GID and they'll come up with my parts every time. Great customer service and follow up as well. Scott emails me from time to time to touch base and see if we're having trouble finding something.....which is often with our 25 yr old equipment.
ConAgra Foods