INTEL D845EBT Technical Product Specification
Intel® Desktop Board D845EBT
Technical Product Specification
May 2002
The Intel® Desktop Board D845EBT 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 D845EBT Specification Update.
Order Number: A92200-001
Revision History
Revision Revision History Date
-001 First release of the Intel Desktop Board D845EBT Technical Product
Specification.
This product specification applies to only the standard Intel Desktop Board D845EBT with BIOS
identifier BT84510A.86A.
Changes to this specification will be published in the Intel Desktop Board D845EBT Specification
Update before being incorporated into a revision of this document.
INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL® PRODUCTS. EXCEPT AS
PROVIDED IN INTEL’S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, INTEL ASSUMES NO LIABILITY
WHATSOEVER, AND INTEL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY, RELATING TO SALE AND/OR USE
OF INTEL PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR
PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT, OR OTHER INTELLECTUAL
PROPERTY RIGHT.
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rights that relate to the presented subject matter. The furnishing of documents and other materials and information does
not provide any license, express or implied, by estoppel or otherwise, to any such patents, trademarks, copyrights, or other
intellectual property rights.
Intel products are not intended for use in medical, life saving, or life sustaining applications or for any other application in
which the failure of the Intel product could create a situation where personal injury or death may occur.
Intel may make changes to specifications, product descriptions, and plans at any time, without notice.
The Intel Desktop Board D845EBT may contain design defects or errors known as errata that may cause the product to
deviate from published specifications. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications before placing your product order.
Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be
obtained from:
Intel Corporation
P.O. Box 5937
Denver, CO 80217-9808
or call in North America 1-800-548-4725, Europe 44-0-1793-431-155, France 44-0-1793-421-777,
Germany 44-0-1793-421-333, other Countries 708-296-9333.
Intel, Pentium, Celeron, and LANDesk 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 2002, Intel Corporation. All rights reserved.
May 2002
Preface
This Technical Product Specification (TPS) specifies the Intel Desktop Board D845EBT layout,
components, connectors, power and environmental requirements, and BIOS. The TPS describes
the standard product and available manufacturing options.
Intended Audience
The TPS is intended to provide detailed, technical information about the Desktop Board D845EBT
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 D845EBT
2 A map of the resources of the Desktop Board D845EBT
3 The features supported by the BIOS Setup program
4 The contents of the BIOS Setup program’s menus and submenus
5 A description of the BIOS error messages, beep codes, and POST codes
Typographical Conventions
This section contains information about the conventions used in this specification. Not all of these
symbols and abbreviations appear in all specifications of this type.
Notes, Cautions, and Warnings
NOTE
✏
Notes call attention to important information.
CAUTION
Cautions are included to help you avoid damaging hardware or losing data.
WARNING
Warnings indicate conditions, which if not observed, can cause personal injury.
iii
Intel Desktop Board D845EBT Technical Product Specification
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 D845EBT, and X is the instance of the
particular part at that general location. For example, J5J1 is a connector, located at 5J. It is
the first connector in the 5J area.
GB Gigabyte (1,073,741,824 bytes)
GB/sec Gigabytes per second
KB Kilobyte (1024 bytes)
Kbit Kilobit (1024 bits)
kbits/sec 1000 bits per second
MB Megabyte (1,048,576 bytes)
MB/sec Megabytes per second
Mbit Megabit (1,048,576 bits)
Mbits/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 ....................................................................................................................12
1.1.1 Feature Summary ........................................................................................12
1.1.2 Manufacturing Options .................................................................................13
1.1.3 Board Layout................................................................................................14
1.1.4 Block Diagram..............................................................................................15
1.2 Online Support ...........................................................................................................16
1.3 Operating System Support .........................................................................................16
1.4 Design Specifications .................................................................................................17
1.5 Processor ...................................................................................................................20
1.6 System Memory .........................................................................................................21
1.7 Intel® 845E Chipset ....................................................................................................23
1.7.1 AGP .............................................................................................................24
1.7.2 USB..............................................................................................................24
1.7.3 IDE Support .................................................................................................25
1.7.4 Real-Time Clock, CMOS SRAM, and Battery...............................................26
1.7.5 4 Mbit Firmware Hub (FWH) ........................................................................26
1.8 IDE RAID Controller ...................................................................................................27
1.9 I/O Controller..............................................................................................................27
1.9.1 Serial Ports ..................................................................................................27
1.9.2 Parallel Port..................................................................................................28
1.9.3 Diskette Drive Controller ..............................................................................28
1.9.4 Keyboard and Mouse Interface ....................................................................28
1.10 IEEE 1394a-2000 Controller.......................................................................................29
1.11 Audio Subsystem........................................................................................................29
1.11.1 6-Channel Audio Subsystem (Optional) .......................................................30
1.11.2 2-Channel Audio Subsystem (Optional) .......................................................31
1.11.3 Audio Connectors.........................................................................................32
1.11.4 Audio Subsystem Software ..........................................................................32
1.12 LAN Subsystem..........................................................................................................33
1.12.1 Intel® 82562ET Platform LAN Connect Device.............................................33
1.12.2 RJ-45 LAN Connector with Integrated LEDs ................................................33
1.12.3 LAN Subsystem Software ............................................................................34
1.13 CNR (Optional)...........................................................................................................34
1.14 Hardware Management Subsystem............................................................................35
1.14.2 Fan Monitoring .............................................................................................37
1.14.3 Chassis Intrusion and Detection...................................................................38
1.15 Power Management ...................................................................................................38
1.15.1 ACPI.............................................................................................................39
1.15.2 Hardware Support ........................................................................................42
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Intel Desktop Board D845EBT Technical Product Specification
2 Technical Reference
2.1 Introduction.................................................................................................................47
2.2 Memory Map ..............................................................................................................47
2.3 Fixed I/O Map.............................................................................................................48
2.4 DMA Channels ...........................................................................................................49
2.5 PCI Configuration Space Map ....................................................................................49
2.6 Interrupts ....................................................................................................................50
2.7 PCI Interrupt Routing Map..........................................................................................51
2.8 Connectors.................................................................................................................53
2.8.1 Back Panel Connectors................................................................................54
2.8.2 Internal I/O Connectors ................................................................................58
2.8.3 External I/O Connectors...............................................................................69
2.9 Jumper Blocks............................................................................................................73
2.9.1 Front Panel Audio Connector/Jumper Block.................................................73
2.9.2 BIOS Setup Configuration Jumper Block......................................................74
2.10 Mechanical Considerations.........................................................................................75
2.10.1 D845EBT Form Factor .................................................................................75
2.10.2 I/O Shield .....................................................................................................76
2.11 Electrical Considerations ............................................................................................78
2.11.1 Power Consumption.....................................................................................78
2.11.2 Add-in Board Considerations........................................................................78
2.11.3 Standby Current Requirements....................................................................79
2.11.4 Fan Connector Current Capability ................................................................80
2.11.5 Power Supply Considerations ......................................................................81
2.12 Thermal Considerations..............................................................................................82
2.13 Reliability ....................................................................................................................83
2.14 Environmental ............................................................................................................84
2.15 Regulatory Compliance ..............................................................................................85
2.15.1 Safety Regulations.......................................................................................85
2.15.2 EMC Regulations .........................................................................................85
2.15.3 Product Certification Markings (Board Level) ...............................................86
3 Overview of BIOS Features
3.1 Introduction.................................................................................................................87
3.2 BIOS Flash Memory Organization ..............................................................................88
3.3 Resource Configuration..............................................................................................88
3.3.1 PCI Autoconfiguration ..................................................................................88
3.3.2 PCI IDE Support...........................................................................................88
3.4 System Management BIOS (SMBIOS).......................................................................89
3.5 Legacy USB Support ..................................................................................................89
3.6 BIOS Updates ............................................................................................................90
3.6.1 Language Support........................................................................................90
3.6.2 Custom Splash Screen.................................................................................90
3.7 Recovering BIOS Data ...............................................................................................91
vi
3.8 Boot Options...............................................................................................................91
3.8.1 CD-ROM Boot..............................................................................................91
3.8.2 Network Boot................................................................................................92
3.8.3 Booting Without Attached Devices ...............................................................92
3.9 Changing the Default Boot Device During POST........................................................92
3.10 Fast Booting Systems with Intel® Rapid BIOS Boot....................................................93
3.10.1 Peripheral Selection and Configuration ........................................................93
3.10.2 Intel Rapid BIOS Boot ..................................................................................93
3.11 BIOS Security Features..............................................................................................94
4 BIOS Setup Program
4.1 Introduction.................................................................................................................95
4.2 Maintenance Menu.....................................................................................................96
4.3 Main Menu..................................................................................................................97
4.4 Advanced Menu..........................................................................................................98
4.4.1 PCI Configuration Submenu.........................................................................99
4.4.2 Boot Configuration Submenu .....................................................................100
4.4.3 Peripheral Configuration Submenu.............................................................101
4.4.4 IDE Configuration Submenu.......................................................................103
4.4.5 Diskette Configuration Submenu................................................................106
4.4.6 Event Log Configuration Submenu.............................................................107
4.4.7 Video Configuration Submenu....................................................................108
4.4.8 USB Configuration Submenu .....................................................................109
4.4.9 Chipset Configuration Submenu.................................................................110
4.5 Security Menu ..........................................................................................................111
4.6 Power Menu .............................................................................................................112
4.6.1 ACPI Submenu ..........................................................................................112
4.7 Boot Menu................................................................................................................113
4.7.1 Boot Device Priority Submenu....................................................................114
4.7.2 Hard Disk Drives Submenu ........................................................................115
4.7.3 Removable Devices Submenu ...................................................................115
4.7.4 ATAPI CD-ROM Drives Submenu..............................................................116
4.8 Exit Menu .................................................................................................................116
Contents
5 Error Messages and Beep Codes
5.1 BIOS Error Messages...............................................................................................117
5.2 Port 80h POST Codes..............................................................................................119
5.3 Bus Initialization Checkpoints ...................................................................................123
5.4 Speaker ...................................................................................................................124
5.5 BIOS Beep Codes ....................................................................................................124
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Intel Desktop Board D845EBT Technical Product Specification
Figures
1. Desktop Board D845EBT Components ......................................................................14
2. Block Diagram ............................................................................................................15
3. Intel 845E Chipset Block Diagram ..............................................................................23
4. USB Port Configuration ..............................................................................................24
5. 6-Channel Audio Subsystem Block Diagram ..............................................................30
6. 2-Channel Audio Subsystem Block Diagram ..............................................................31
7. ICH4 and CNR Signal Interface..................................................................................34
8. Thermal Monitoring.....................................................................................................37
9. Location of the Standby Power Indicator LED ............................................................45
10. Back Panel Connectors ..............................................................................................54
11. Power and Hardware Control Connectors ..................................................................59
12. D845EBT Add-in Board and Peripheral Interface Connectors ....................................62
13. External I/O Connectors .............................................................................................69
14. Location of the Jumper Blocks....................................................................................73
15. Desktop Board D845EBT Dimensions ........................................................................75
16. I/O Shield Dimensions (for Boards with the 6-Channel Audio Subsystem) .................76
17. I/O Shield Dimensions (for Boards with the 2-Channel Audio Subsystem) .................77
18. Localized High Temperature Zones............................................................................82
Tables
1. Feature Summary.......................................................................................................12
2. Manufacturing Options ...............................................................................................13
3. Specifications .............................................................................................................17
4. Supported Memory Configurations .............................................................................22
5. LAN Connector LED States ........................................................................................33
6. Effects of Pressing the Power Switch .........................................................................39
7. Power States and Targeted System Power ................................................................40
8. Wake-up Devices and Events.....................................................................................41
9. Fan Connector Function/Operation.............................................................................43
10. System Memory Map..................................................................................................47
11. I/O Map ......................................................................................................................48
12. DMA Channels ...........................................................................................................49
13. PCI Configuration Space Map ....................................................................................49
14. Interrupts ....................................................................................................................50
15. PCI Interrupt Routing Map..........................................................................................52
16. PS/2 Mouse/Keyboard Connector ..............................................................................55
17. IEEE 1394a-2000 Connector......................................................................................55
18. USB Connectors.........................................................................................................55
19. Serial Port A Connector..............................................................................................55
20. Parallel Port Connector...............................................................................................56
21. S/PDIF Connector (Optional)......................................................................................56
22. Audio Rear Out Connector (Optional).........................................................................56
23. Audio Center/LFE Out Connector (Optional) ..............................................................56
24. Audio Line In Connector .............................................................................................57
25. Audio Line Out Connector (Front Out for 6-Channel Audio)........................................57
viii
Contents
26. Mic In Connector ........................................................................................................57
27. LAN Connector...........................................................................................................57
28. ATX12V Power Connector..........................................................................................60
29. Rear Chassis Fan Connector .....................................................................................60
30. Processor Fan Connector...........................................................................................60
31. Main Power Connector...............................................................................................60
32. Chassis Intrusion Connector.......................................................................................61
33. Front Chassis Fan Connector.....................................................................................61
34. CNR Connector (Optional)..........................................................................................63
35. PCI Bus Connectors...................................................................................................64
36. AGP Connector ..........................................................................................................65
37. ATAPI-Style CD-ROM Connector...............................................................................66
38. Diskette Drive Connector............................................................................................66
39. PCI IDE Connectors ...................................................................................................67
40. SCSI LED Connector..................................................................................................67
41. IDE RAID Connectors.................................................................................................68
42. Front Panel Audio Connector .....................................................................................70
43. Serial Port B Connector..............................................................................................70
44. Front Panel USB Connector .......................................................................................70
45. Front Panel IEEE 1394a-2000 Connectors.................................................................71
46. Front Panel Connector ...............................................................................................71
47. States for a One-Color Power LED.............................................................................72
48. States for a Two-Color Power LED.............................................................................72
49. Auxiliary Front Panel Power/Sleep/Message-Waiting LED Connector ........................72
50. Front Panel Audio Connector/Jumper Block...............................................................74
51. BIOS Setup Configuration Jumper Settings................................................................74
52. Power Usage..............................................................................................................78
53. Standby Current Requirements ..................................................................................79
54. Fan Connector Current Capability ..............................................................................80
55. Thermal Considerations for Components ...................................................................83
56. Desktop Board D845EBT Environmental Specifications.............................................84
57. Safety Regulations .....................................................................................................85
58. EMC Regulations........................................................................................................85
59. Boot Device Menu Options.........................................................................................92
60. Supervisor and User Password Functions..................................................................94
61. BIOS Setup Program Menu Bar .................................................................................95
62. BIOS Setup Program Function Keys ..........................................................................96
63. Maintenance Menu.....................................................................................................96
64. Main Menu..................................................................................................................97
65. Advanced Menu..........................................................................................................98
66. PCI Configuration Submenu.......................................................................................99
67. Boot Configuration Submenu....................................................................................100
68. Peripheral Configuration Submenu...........................................................................101
69. IDE Configuration Submenu.....................................................................................103
70. Primary/Secondary IDE Master/Slave Submenus.....................................................104
71. Diskette Configuration Submenu ..............................................................................106
72. Event Log Configuration Submenu...........................................................................107
73. Video Configuration Submenu..................................................................................108
ix
Intel Desktop Board D845EBT Technical Product Specification
74. USB Configuration Submenu....................................................................................109
75. Chipset Configuration Submenu...............................................................................110
76. Security Menu ..........................................................................................................111
77. Power Menu .............................................................................................................112
78. ACPI Submenu.........................................................................................................112
79. Boot Menu................................................................................................................113
80. Boot Device Priority Submenu..................................................................................114
81. Hard Disk Drives Submenu ......................................................................................115
82. Removable Devices Submenu..................................................................................115
83. ATAPI CD-ROM Drives Submenu ............................................................................116
84. Exit Menu .................................................................................................................116
85. BIOS Error Messages...............................................................................................117
86. Uncompressed INIT Code Checkpoints....................................................................119
87. Boot Block Recovery Code Checkpoints ..................................................................119
88. Runtime Code Uncompressed in F000 Shadow RAM ..............................................120
89. Bus Initialization Checkpoints ...................................................................................123
90. Upper Nibble High Byte Functions............................................................................123
91. Lower Nibble High Byte Functions............................................................................124
92. Beep Codes..............................................................................................................125
x
1 Product Description
What This Chapter Contains
1.1 Overview ....................................................................................................................12
1.2 Online Support ...........................................................................................................16
1.3 Operating System Support .........................................................................................16
1.4 Design Specifications .................................................................................................17
1.5 Processor ...................................................................................................................20
1.6 System Memory .........................................................................................................21
1.7 Intel® 845E Chipset ....................................................................................................23
1.8 IDE RAID Controller ...................................................................................................27
1.9 I/O Controller..............................................................................................................27
1.10 IEEE 1394a-2000 Controller.......................................................................................29
1.11 Audio Subsystem........................................................................................................29
1.12 LAN Subsystem..........................................................................................................33
1.13 CNR (Optional)...........................................................................................................34
1.14 Hardware Management Subsystem............................................................................35
1.15 Power Management ...................................................................................................38
11
Intel Desktop Board D845EBT Technical Product Specification
1.1 Overview
1.1.1 Feature Summary
Table 1 summarizes the major features of the Intel® Desktop Board D845EBT.
Table 1. Feature Summary
Form Factor
ATX (12.00 inches by 8.20 inches)
Processor
Memory
Chipset
Video
Audio
USB
Peripheral
Interfaces
IEEE 1394a-2000
IDE RAID
Expansion
Capabilities
I/O Control
LAN
• Support for an Intel
®
Pentium® 4 processor in a µPGA478 socket with a
400/533 MHz system bus
• Support for an Intel
®
Celeron® processor in a µPGA478 socket with a 400 MHz
system bus
• Two 184-pin DDR SDRAM Dual Inline Memory Module (DIMM) sockets
• Support for single-sided or double-sided DIMMs (DDR 200 and DDR 266)
• Support for up to 2 GB of system memory
NOTE: The Desktop Board D845EBT has been designed to support DIMMs based
on 512 Mbit technology for a maximum onboard capacity of up to 2 GB, but
this technology has not been validated on this board. Please refer to the
following Intel web site:
http://developer.intel.com/design/motherbd/bt/bt_mem.htm
®
845E Chipset, consisting of:
Intel
®
• Intel
• Intel
82845E Memory Controller Hub (MCH)
®
82801DB I/O Controller Hub (ICH4)
• 4 Mbit Firmware Hub (FWH)
AGP connector supporting 1.5 V 4X AGP cards
See Manufacturing Options on page 13.
Support for USB 2.0 devices
• Up to six USB ports
• Two serial ports
• One parallel port
• Two IDE interfaces with UDMA 33, ATA-66/100 support
• One diskette drive interface
• PS/2
†
keyboard and mouse ports
• Three fan connectors
• Agere Systems FW323 controller
• Three IEEE 1394a-2000 ports
• Promise
†
Technology PDC20267 ATA/100 controller supporting RAID 0,
RAID 1, and RAID 0+1
• Two IDE RAID connectors
Five PCI bus add-in card connectors (SMBus routed to PCI bus connector 1)
SMSC LPC47M102 LPC Bus I/O controller
®
Intel
82562ET 10/100 Mbits/sec Platform LAN Connect (PLC) device
continued
12
Table 1. Feature Summary (continued)
Hardware Monitor
Subsystem
BIOS
Instantly Available
PC Technology
• Hardware management ASIC
• Voltage sense to detect out of range power supply voltages
• Thermal sense to detect out of range thermal values
• Two fan sense inputs used to monitor fan activity
• Fan speed control
• Intel/AMI BIOS (resident in the 4 Mbit FWH)
• Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,
and SMBIOS
• Support for PCI Local Bus Specification Revision 2.2
• Suspend to RAM support
• Wake on PCI, CNR, RS-232, front panel, PS/2 devices, and USB ports
For information about Refer to
The Desktop Board D845EBT’s compliance level with ACPI,
Plug and Play, and SMBIOS.
Product Description
Section 1.4, page 17
1.1.2 Manufacturing Options
Table 2 describes the manufacturing options for the Desktop Board D845EBT. Not every
manufacturing option is available in all marketing channels. Please contact your Intel
representative to determine which manufacturing options are available to you.
Table 2. Manufacturing Options
Audio
CNR
For information about Refer to
Available configurations for the Desktop Board D845EBT Section 1.2, page 16
The Desktop Board D845EBT includes either of the following audio subsystems for
AC ’97 processing:
• 6-channel audio subsystem using the Analog Devices AD1980 codec
• 2-channel audio subsystem using the Analog Devices AD1981A codec
Communication and Networking Riser (CNR) connector.
NOTE: LAN and USB CNR cards are not supported.
13
Intel Desktop Board D845EBT Technical Product Specification
1.1.3 Board Layout
Figure 1 shows the location of the major components on the Desktop Board D845EBT.
CA
B
D
V
U
T
S
R
Q
P
A Audio codec L Diskette drive connector
B Intel 82562ET PLC device M 4 Mbit Firmware Hub (FWH)
C AGP connector N Intel 82801DB I/O Controller Hub (ICH4)
D Back panel connectors O Speaker
E +12 V power connector (ATX12V) P Front panel connector
F Intel 82845E Memory Controller Hub (MCH) Q RAID connectors
G µPGA478 processor socket R RAID controller
H DIMM sockets S Battery
I I/O controller T PCI bus add-in card connectors
J Power connector U IEEE 1394a-2000 controller
K IDE connectors V CNR connector (optional)
N
O
L
J
KM
OM14388
E
F
G
H
I
14
Figure 1. Desktop Board D845EBT Components
Product Description
1.1.4 Block Diagram
Figure 2 is a block diagram of the major functional areas of the Desktop Board D845EBT. See
Figure 4 on page 24 for USB port routing.
Primary/
Secondary IDE
µPGA478
Processor Socket
AGP
Interface
4X AGP
Connector
(1.5 V only)
DIMM Banks (2)
Primary/
Secondary
RAID
IEEE 1394a-2000
Ports (3)
PCI Slot 1
PCI Slot 2
PCI Slot 3
PCI Slot 4
PCI Slot 5
= connector or socket
System Bus
(400/533 MHz)
Intel 82845E
Memory Controller
Hub (MCH)
Memory Bus
PD20267
Controller
FWE323
IEEE 1394a-2000
Controller
PCI Bus
SMBus
UDMA 33 and
ATA-66/100
SMBus
RAID
Monitoring
Control ASIC
AHA
Bus
Hardware
and Fan
USB
LPC Bus
Controller
Intel 82801DB
I/O Controller Hub
(ICH4)
CSMA/CD
Unit Interface
AD1980
Audio Codec
(Optional)
AD1981A
Audio Codec
(Optional)
I/O
LPC
Bus
AC Link
SMBus
Serial Ports
Parallel Port
PS/2 Mouse
PS/2 Keyboard
Firmware Hub
Intel 845E Chipset
Physical
Layer
Interface
Front Out
Center/LFE Out
Rear Out
S/PDIF
Line In
Mic In
CD-ROM
Line Out
Line In
Mic In
CD-ROM
Back Panel/
Front Panel
USB Ports
Diskette Drive
Connector
4 Mbit
(FWH)
LAN
Connector
CNR
Connector
(Optional)
OM14467
Figure 2. Block Diagram
15
Intel Desktop Board D845EBT Technical Product Specification
1.2 Online Support
To find information about… Visit this World Wide Web site:
The Desktop Board D845EBT, look
under “Desktop Board Products” or
“Desktop Board Support”
Available configurations for the Desktop
Board D845EBT
Processor data sheets http://www.intel.com/design/litcentr
ICH4 addressing http://developer.intel.com/design/chipsets/datashts
Custom splash screens http://intel.com/design/motherbd/gen_indx.htm
Audio software and utilities http://www.intel.com/design/motherbd
LAN software and drivers http://www.intel.com/design/motherbd
http://www.intel.com/design/motherbd
http://support.intel.com/support/motherboards/desktop
http://developer.intel.com/design/motherbd/bt/bt_available.htm
1.3 Operating System Support
The Desktop Board D845EBT supports drivers for all of the onboard hardware and subsystems
under the following operating systems:
†
• Microsoft Windows
• Windows ME
• Windows 2000
• Windows XP
For information about Refer to
Supported drivers Section 1.2, page 16
98 SE
NOTES
✏
• Third party vendors may offer other drivers.
• IEEE 1394a-2000 support has been tested with Windows 2000 and Windows XP drivers and is
not currently supported by any other operating system.
• USB 2.0 support has been tested with Windows 2000 and Windows XP drivers and is not
currently supported by any other operating system.
16
1.4 Design Specifications
Table 3 lists the specifications applicable to the Desktop Board D845EBT.
Table 3. Specifications
Reference
Name
1394
AC ’97 Audio Codec ’97 Revision 2.2,
ACPI Advanced Configuration
AGP Accelerated Graphics Port
AMI BIOS AMIBIOS Desktop Core 8.0 AMIBIOS 8.0,
ATA/
ATAPI-5
ATX ATX Specification Version 2.03,
ATX12V ATX/ATX12V Power
BIS Boot Integrity Services
CNR
Specification
Title
IEEE Std 1394-1995,
IEEE Standard for a High
Performance Serial Bus
IEEE Std 1394a-2000,
IEEE Standard for a High
Performance Serial Bus –
Amendment 1
and Power Interface
Specification
Interface Specification
Information Technology-AT
Attachment with Packet
Interface - 5
(ATA/ATAPI-5)
Supply Design Guide
(BIS) Application
Programming Interface
(API)
Communication and
Network Riser (CNR)
Specification
Version, Revision Date,
and Ownership
November 8, 2001
Institute of Electrical and
Electronic Engineers.
June 29, 2000
Institute of Electrical and
Electronic Engineers.
September 2000,
Intel Corporation.
Version 2.0,
July 27, 2000,
Compaq Computer
Corporation,
Intel Corporation,
Microsoft Corporation,
Phoenix Technologies
Limited, and
Toshiba Corporation.
Revision 2.0,
May 4, 1998,
Intel Corporation.
2001,
American Megatrends, Inc.
Revision 3,
February 29, 2000,
Contact: T13 Chair,
Seagate Technology.
December 1998,
Intel Corporation.
Version 1.2,
August 2000,
Intel Corporation.
Version 1.0,
August 4, 1999,
Intel Corporation.
Revision 1.2,
November 8, 2001,
Intel Corporation.
Product Description
The information is
available from…
http://standards.ieee.org/
catalog/olis/busarch.html
http://standards.ieee.org/
catalog/olis/busarch.html
ftp://download.intel.com/ial/
scalableplatforms/
ac97r22.pdf
http://www.acpi.info/spec.htm
http://www.agpforum.org/
specs_specs.htm
http://www.ami.com/support/
doc/amibios8.pdf
http://www.t13.org
http://www.formfactors.org/
developer/specs/atx/
atxspecs.htm
http://www.formfactors.org/
developer/specs/atx/
atxspecs.htm
http://www.intel.com/labs/
manage/wfm/wfmspecs.htm
http://developer.intel.com/
technology/cnr/index.htm
continued
17
Intel Desktop Board D845EBT Technical Product Specification
Table 3. Specifications (continued)
Reference
Name
DDR
SDRAM
EHCI
EPP IEEE Std 1284.1-1997
El Torito Bootable CD-ROM
Front Panel Front Panel I/O
LPC Low Pin Count Interface
OHCI OpenHCI – Open Host
PCI PCI Local Bus
PCI Bus Power
Plug and
Play
Specification
Title
Double Data Rate (DDR)
SDRAM Specification
Design Specification for
a 184 Pin DDR
Unbuffered DIMM
®
JEDEC DDR
Intel
200/266 Unbuffered
DIMM Specification
Addendum
Enhanced Host
Controller Interface
Specification for
Universal Serial Bus
(Enhanced Parallel Port)
Format Specification
Connectivity Design
Guide
Specification
Controller Interface
Specification for USB
Specification
Management Interface
Specification
Plug and Play BIOS
Specification
Version, Revision Date and
Ownership
Version 1.0,
June 2000,
JEDEC Solid State Technology
Association.
Revision 1.0,
October 2001,
JEDEC Solid State Technology
Association.
Revision 0.9,
September 27, 2001,
Intel Corporation.
Revision 1.0,
March 12, 2002,
Intel Corporation.
Version 1.7, 1997,
Institute of Electrical and
Electronic Engineers.
Version 1.0,
January 25, 1995,
Phoenix Technologies Limited
and International Business
Machines Corporation.
Version 1.0,
October 2000,
Intel Corporation.
Revision 1.0,
September 29, 1997,
Intel Corporation.
Release 1.0a,
October 10, 1996,
Compaq computer Corp.,
Microsoft Corporation, and
National Semiconductor Corp.
Revision 2.2,
December 18, 1998,
PCI Special Interest Group.
Revision 1.1,
December 18, 1998,
PCI Special Interest Group.
Version 1.0a,
May 5, 1994,
Compaq Computer Corporation,
Phoenix Technologies Limited,
and Intel Corporation.
The information is
available from…
http://www.jedec.org/
http://www.jedec.org/
http://developer.intel.com/
technology/memory/
index.htm
http://developer.intel.com/
technology/usb/download/
ehci-r10.pdf
http://standards.ieee.org/
reading/ieee/std_public/
description/busarch/
1284.1-1997_desc.html
http://www.phoenix.com/
PlatSS/products/specs.html
http://www.formfactors.org/
formfactors/
front_panel_io.htm
http://www.intel.com/
design/chipsets/industry/
lpc.htm
http://www.usb.org/
developers/docs.html
http://www.pcisig.com/
specifications
http://www.pcisig.com/
specifications
http://www.microsoft.com/
hwdev/tech/PnP/
default.asp
continued
18
Table 3. Specifications (continued)
Reference
Name
PXE Preboot Execution
SMBIOS System Management
UHCI Universal Host Controller
USB Universal Serial Bus
WfM Wired for Management
Specification
Title
Environment
BIOS
Interface Design Guide
Specification
Baseline
Version, Revision Date
and Ownership
Version 2.1,
September 20, 1999,
Intel Corporation.
Version 2.3.1,
March 16, 1999,
American Megatrends
Incorporated,
Award Software International
Incorporated,
Compaq Computer Corporation,
Dell Computer Corporation,
Hewlett-Packard Company,
Intel Corporation,
International Business Machines
Corporation,
Phoenix Technologies Limited,
and SystemSoft Corporation.
Revision 1.1,
March 1996,
Intel Corporation.
Revision 2.0,
April 27, 2000,
Compaq Computer Corporation,
Hewlett-Packard Company,
Lucent Technologies Inc.,
Intel Corporation,
Microsoft Corporation,
NEC Corporation, and
Koninklijke Philips Electronics
N.V.
Version 2.0,
December 18, 1998,
Intel Corporation.
Product Description
The information is
available from…
ftp://download.intel.com/
labs/manage/wfm/
download/pxespec.pdf
http://www.dmtf.org/
download/standards/
DSP0119.pdf
http://www.usb.org/
developers/docs.html
http://www.usb.org/
developers/docs.html
http://www.intel.com/labs/
manage/wfm/
wfmspecs.htm
19
Intel Desktop Board D845EBT Technical Product Specification
1.5 Processor
CAUTION
Use of unsupported processors can damage the Desktop Board D845EBT, the processor, and the
power supply. See Intel’s World Wide Web site for the most up-to-date list of supported
processors for the Desktop Board D845EBT.
The Desktop Board D845EBT supports:
• A Pentium 4 processor in a µPGA478 socket with a system bus of 400/533 MHz
• A Celeron processor in a µPGA478 socket with a system bus of 400 MHz
The list of supported processors for the Desktop Board D845EBT is available from Intel’s World
Wide Web site. All supported onboard memory can be cached. See the processor’s data sheet for
cachability limits.
NOTE
✏
Do not use a standard ATX power supply. The Desktop Board D845EBT will not boot with a
standard ATX power supply. Use only ATX12V-compliant power supplies with the Desktop Board
D845EBT. ATX12V power supplies have an additional power lead that provides required
supplemental power for the processor. Connect the 20-pin and 4-pin leads of ATX12V power
supplies to the corresponding connectors on the Desktop Board D845EBT or it will not boot.
For information about Refer to
Supported processors Section 1.2, page 16
Processor usage Section 1.2, page 16
Power supply connectors Section 2.8.2.2, page 59
20
Product Description
1.6 System Memory
The Desktop Board D845EBT has two DIMM sockets and supports the following memory
features:
• 2.5 V (only) 184-pin DDR SDRAM DIMMs with gold-plated contacts
• Unbuffered, unregistered single-sided or double-sided DIMMs
• Maximum total system memory: 2 GB
• Minimum total system memory: 64 MB
• 200/266 MHz DDR SDRAM DIMMs only
• Serial Presence Detect
• Suspend to RAM
• Non-ECC and ECC DIMMs
NOTES
✏
• Remove the AGP video card before installing or upgrading memory to avoid interference with
the memory retention mechanism.
• The Desktop Board D845EBT has been designed to support DIMMs based on 512 Mbit
technology for a maximum onboard capacity of up to 2 GB, but this technology has not been
validated on this desktop board. Please refer to the following Intel web sites for the latest lists
of tested memory.
http://developer.intel.com/design/motherbd/bt/bt_mem.htm
• To be fully compliant with all applicable DDR SDRAM memory specifications, the Desktop
Board D845EBT 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.
• For ECC functionality, all installed DIMMs must be ECC.
(see second NOTE below)
For information about Refer to
Obtaining DDR SDRAM specifications Section 1.4, page 17
21
Intel Desktop Board D845EBT Technical Product Specification
Table 4 lists the supported DIMM configurations.
Table 4. Supported Memory Configurations
DIMM
Capacity
64 MB DS 64 Mbit 4 M x 16/4 M x 16 8
64 MB SS 64 Mbit 8 M x 8/empty 8
64 MB SS 128 Mbit 8 M x 16/empty 4
128 MB DS 64 Mbit 8 M x 8/8 M x 8 16
128 MB DS 128 Mbit 8 M x 16/8 M x 16 8
128 MB SS 128 Mbit 16 M x 8/empty 8
128 MB SS 256 Mbit 16 M x 16/empty 4
256 MB DS 128 Mbit 16 M x 8/16 M x 8 16
256 MB DS 256 Mbit 16 M x 16/16 M x 16 8
256 MB SS 256 Mbit 32 M x 8/empty 8
512 MB DS 256 Mbit 32 M x 8/32 M x 8 16
Note: In the second column, “DS” refers to double-sided memory modules (containing two rows of DDR SDRAM) and “SS”
refers to single-sided memory modules (containing one row of DDR SDRAM).
Configuration
DDR SDRAM
Density
DDR SDRAM Organization
Front-side/Back-side
Number of DDR
SDRAM Devices
22
Product Description
1.7 Intel® 845E Chipset
The Intel 845E chipset consists of the following devices:
• Intel 82845E Memory Controller Hub (MCH) with Accelerated Hub Architecture (AHA) bus
• Intel 82801DB I/O Controller Hub (ICH4) with AHA bus
• Firmware Hub (FWH)
The MCH is a centralized controller for the system bus, the memory bus, the AGP bus, and the
Accelerated Hub Architecture interface. The ICH4 is a centralized controller for the Desktop
Board D845EBT’s I/O paths. The FWH provides the nonvolatile storage of the BIOS. The
component combination provides the chipset interfaces as shown in Figure 3.
UDMA 33
ATA-66/100
System Bus
Network
USB
845E Chipset
82845E
Memory Controller
Hub (MCH)
DDR SDRAM
AGP
Interface
AHA
Bus
Bus
82801DB
I/O Controller Hub
(ICH4)
4 Mbit Firmware
Hub (FWH)
LPC Bus
AC LinkPCI BusSMBus
OM14259
Figure 3. Intel 845E Chipset Block Diagram
For information about Refer to
The Intel 845E chipset http://developer.intel.com
Resources used by the chipset Chapter 2
23
Intel Desktop Board D845EBT Technical Product Specification
1.7.1 AGP
AGP is a high-performance interface for graphics-intensive applications, such as 3D applications.
While based on the PCI Local Bus Specification, Rev. 2.2, AGP is independent of the PCI bus and
is intended for exclusive use with graphical display devices. AGP overcomes certain limitations of
the PCI bus related to handling large amounts of graphics data with the following features:
• Pipelined memory read and write operations that hide memory access latency
• Demultiplexing of address and data on the bus for nearly 100 percent efficiency
NOTES
✏
• The AGP connector is keyed for 1.5 V Switching Voltage Level (SVL) AGP cards only; the
connector is not mechanically compatible with legacy 3.3 V AGP cards. Do not attempt to
install a legacy 3.3 V AGP card.
• Install memory in the DIMM sockets prior to installing the AGP video card to avoid
interference with the memory retention mechanism.
For information about Refer to
The location of the AGP connector Figure 1, page 14
The signal names of the AGP connector Table 36, page 65
Obtaining the Accelerated Graphics Port Interface Specification Section 1.4, page 17
1.7.2 USB
The Desktop Board D845EBT supports up to six USB 2.0 ports, fully supports UHCI and EHCI,
and uses UHCI- and EHCI-compatible drivers. For more than six USB devices, an external hub
can be connected to any of the ports.
The ICH4 provides the USB controller for all ports, as shown in Figure 4. The port arrangement is
as follows:
• Two ports are implemented with stacked back panel connectors, adjacent to the PS/2
connectors
• Two ports are implemented with stacked back panel connectors, adjacent to the audio
connectors
• Two ports are routed to the front panel USB connector
Back panel USB connectors
adjacent to the PS/2 ports
Back panel USB connectors
adjacent to the audio connectors
Front panel USB connectors
OM14260
82801DB
I/O Controller Hub
(ICH4)
USB
USB
USB
USB ports (2)
USB ports (2)
USB ports (2)
24
Figure 4. USB Port Configuration
Product Description
NOTES
✏
• Computer systems that have an unshielded cable attached to a USB port may not meet FCC
Class B requirements, even if no device is attached to the cable. Use shielded cable that meets
the requirements for full-speed devices.
• USB 2.0 support has been tested with Windows 2000 and Windows XP drivers and is not
currently supported by any other operating system.
For information about Refer to
The location of the USB connectors on the back panel Figure 10, page 54
The signal names of the back panel USB connectors Table 18, page 55
The location of the front panel USB connector Figure 13, page 69
The signal names of the front panel USB connector Table 44, page 70
The front panel, EHCI, UHCI, and USB specifications Section 1.4, page 17
1.7.3 IDE Support
1.7.3.1 IDE Interfaces
The ICH4’s IDE controller has two independent bus-mastering IDE interfaces that can be
independently enabled. The IDE interfaces support 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 ICH4’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 IDE interfaces also support ATAPI devices (such as CD-ROM drives) and ATA devices using
the transfer modes listed in Section 4.4.4.1 on page 104.
The BIOS supports Logical Block Addressing (LBA) and Extended Cylinder Head Sector (ECHS)
translation modes. The drive reports the transfer rate and translation mode to the BIOS.
The Desktop Board D845EBT supports Laser Servo (LS-120) diskette technology through the IDE
interfaces. The BIOS supports booting from an LS-120 drive.
25
Intel Desktop Board D845EBT Technical Product Specification
✏ NOTE
The BIOS will always recognize an LS-120 drive as an ATAPI floppy drive. To ensure correct
operation, do not configure the drive as a hard disk drive.
For information about Refer to
The location of the IDE connectors Figure 12, page 62
The signal names of the IDE connectors Table 39, page 67
IDE RAID support Section 1.8, page 27
1.7.3.2 SCSI Hard Drive Activity LED Connector
The SCSI hard drive activity LED connector is a 1 x 2-pin connector that allows an add-in
SCSI controller to use the same LED as the onboard IDE controller. For proper operation, this
connector should be wired to the LED output of the add-in SCSI controller. The LED indicates
when data is being read from, or written to, both the add-in SCSI controller and the IDE controller.
For information about Refer to
The location of the SCSI hard drive activity LED connector Figure 12, page 62
The signal names of the SCSI hard drive activity LED connector Table 40, page 67
1.7.4 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.
1.7.5 4 Mbit Firmware Hub (FWH)
The FWH provides the following:
• System BIOS program
• Logic that enables protection for storing and updating of platform information
26
Product Description
1.8 IDE RAID Controller
The Promise Technology PDC20267 is a PCI bus-mastering ATA controller of a redundant array
of independent disks (RAID). The controller supports:
• Up to four UDMA 100/66/33 drives or EIDE drives
• RAID 0 (striping)
• RAID 1 (mirroring)
• RAID 0+1 (striping, then mirroring)
• 100 MB/sec data transfer with CRC error checking
• A bootable array
• Hot swapping of failed mirrored drives
For information about Refer to
The location of the IDE RAID connectors Figure 12, page 62
The signal names of the IDE RAID connectors Table 41, page 68
BIOS Setup program’s Boot menu Table 79, page 113
1.9 I/O Controller
The SMSC LPC47M102 I/O controller provides the following features:
• Two serial ports
• One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port
(EPP) support
• Serial IRQ interface compatible with serialized IRQ support for PCI 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 power management support
The BIOS Setup program provides configuration options for the I/O controller.
For information about Refer to
SMSC LPC47M102 I/O controller http://www.smsc.com
1.9.1 Serial Ports
The Desktop Board D845EBT has two serial port connectors. Serial port A is located on the back
panel. Serial port B is accessible using a connector located near the main power connector. The
serial ports support 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 10, page 54
The signal names of the serial port A connector Table 19, page 55
The location of the serial port B connector Figure 13, page 69
The signal names of the serial port B connector Table 43, page 70
27
Intel Desktop Board D845EBT Technical Product Specification
1.9.2 Parallel Port
The 25-pin D-Sub parallel port connector is located on the back panel. Use the BIOS Setup
program to set the parallel port mode.
For information about Refer to
The location of the parallel port connector Figure 10, page 54
The signal names of the parallel port connector
Table 20, page 56
Setting the parallel port’s mode Table 68, page 101
1.9.3 Diskette Drive Controller
The I/O controller supports one diskette drive. Use the BIOS Setup program to configure the
diskette drive interface.
For information about Refer to
The location of the diskette drive connector Figure 12, page 62
The signal names of the diskette drive connector Table 38, page 66
The supported diskette drive capacities and sizes Table 71, page 106
1.9.4 Keyboard and Mouse Interface
The 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 10, page 54
The signal names of the keyboard and mouse connectors Table 16, page 55
28
Product Description
1.10 IEEE 1394a-2000 Controller
The Agere Systems FW323 PCI bus-based controller provides IEEE 1394a-2000 OHCI link and
PHY core functionality. The controller supports:
• IEEE 1394a-2000-compliant or IEEE 1394-1995-compliant peripheral devices
• Isochronous and asynchronous data transfer
• Data transfer up to 400 Mbits/sec
• Peripheral hot swapping
• Plug and play
The Desktop Board D845EBT has one back panel and two front panel IEEE 1394a-2000
connectors.
NOTE
✏
IEEE 1394a-2000 support has been tested with Windows 2000 and Windows XP drivers and is not
currently supported by any other operating system.
For information about Refer to
The location of the back panel IEEE 1394a-2000 connector Figure 10, page 54
The signal names of the back panel IEEE 1394a-2000 connector Table 17, page 55
The location of the front panel IEEE 1394a-2000 connectors Figure 13, page 69
The signal names of the front panel IEEE 1394a-2000 connectors Table 45, page 71
Obtaining IEEE standards:
• 1394-1995, IEEE Standard for a High Performance Serial Bus
• 1394a-2000, IEEE Standard for a High Performance Serial Bus – Amendment 1
Table 3, page 17
1.11 Audio Subsystem
The Desktop Board D845EBT includes one of the following:
• 6-channel audio subsystem based on the Analog Devices AD1980 codec (described on
page 30)
• 2-channel audio subsystem based on the Analog Devices AD1981A codec (described on
page 31)
Both audio subsystems feature:
• Split digital/analog architecture for improved S/N (signal-to-noise) ratio: > 90 dB
• Power management support for ACPI 2.0 (driver dependent)
29
Intel Desktop Board D845EBT Technical Product Specification
1.11.1 6-Channel Audio Subsystem (Optional)
The audio subsystem includes the following:
• Intel 82801DB I/O Controller Hub (ICH4)
• Analog Devices AD1980 audio codec
• Microphone input that supports either of the following:
A single dynamic, condenser, or electret microphone
Dual microphones for use with voice recognition software
The subsystem includes the following connectors:
• Front panel analog audio connector that can be used as a connector for routing the following
signals to the front panel or used as a jumper block for routing the signals to the back panel
(see page 73 for more information). The connector/jumper block includes pins for:
Front left/right out
Mic in
• Back panel analog audio connectors:
Front left/right out
Center/Low Frequency Effects (LFE) out
Rear left/right out
Line in
Mic in
• Back panel digital line out (S/PDIF) connector
• ATAPI-style CD-ROM connector
Figure 6 is a block diagram of the 6-channel audio subsystem.
Front Left/Right Out
Center/LFE Out
82801DB
I/O Controller Hub
(ICH4)
AC ’97
Link
AD1980
Audio Codec
Rear Left/Right Out
Line In
Mic In
CD-ROM
S/PDIF Out
OM14465
Figure 5. 6-Channel Audio Subsystem Block Diagram
For information about Refer to
The front panel audio connector Section 2.8.3, page 69
The back panel audio connectors Section 2.8.1, page 54
30
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