Intel D845HV Configuration guide

Intel®Desktop Board
D845HV/D845WN
Technical Product Specification
August 2001
Order Number: A65136-001
The Intel®Desktop Boards D845HV/D845WN 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 D845HV/D845WN Specification Update.

Revision History
Revision Revision History Date
-001 First release of the Intel®Desktop Board D845HV/D845WN Technical
Product Specification. August 2001
This product specification applies to only standard D845HV and D845WN boards with BIOS
identifier HV84510A.86A.
Changes to this specification will be published in the Intel Desktop Board D845HV/D845WN
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 Boards D845HV and D845WN 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 and Pentium are trademarks or 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 2001, Intel Corporation. All rights reserved.

iii
Preface
This Technical Product Specification (TPS) specifies the board layout, components, connectors,
power and environmental requirements, and the BIOS for these Intel®Desktop Boards: D845HV
and D845WN. It describes the standard product and available manufacturing options.
Intended Audience
The TPS is intended to provide detailed, technical information about the D845HV and D845WN
boards and their components to the vendors, system integrators, and other engineers and
technicians who need this level of information. It is specifically not intended for general
audiences.
What This Document Contains
Chapter Description
1 A description of the hardware used on the D845HV and D845WN boards
2 A map of the resources of the boards
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.

Intel Desktop Board D845HV/D845WN Technical Product Specification
iv
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 D845HV and D845WN boards, and X is the instance of the
particular part at that general location. For example, J5J1 is a connector, located at 5J. It is
the first connector in the 5J area.
GB Gigabyte (1,073,741,824 bytes)
GB/sec Gigabytes per second
KB Kilobyte (1024 bytes)
Kbit Kilobit (1024 bits)
kbits/sec 1000 bits per second
MB Megabyte (1,048,576 bytes)
MB/sec Megabytes per second
Mbit Megabit (1,048,576 bits)
Mbit/sec Megabits per second
xxh An address or data value ending with a lowercase h indicates a hexadecimal value.
x.x V Volts. Voltages are DC unless otherwise specified.
†This symbol is used to indicate third-party brands and names that are the property of their
respective owners.

v
Contents
1Product Description
1.1 Board Differences.......................................................................................................11
1.2 Overview ....................................................................................................................12
1.2.1 Feature Summary ........................................................................................12
1.2.2 Manufacturing Options.................................................................................13
1.2.3 Board Layouts..............................................................................................14
1.2.4 Block Diagram..............................................................................................16
1.3 Online Support ...........................................................................................................17
1.4 Operating System Support.........................................................................................17
1.5 Design Specifications .................................................................................................18
1.6 Processor...................................................................................................................21
1.7 System Memory .........................................................................................................22
1.8 Intel®845 Chipset.......................................................................................................24
1.8.1 AGP .............................................................................................................25
1.8.2 USB..............................................................................................................25
1.8.3 IDE Support .................................................................................................27
1.8.4 Real-Time Clock, CMOS SRAM, and Battery...............................................28
1.8.5 Intel®82802AB 4 Mbit Firmware Hub (FWH) ...............................................29
1.9 I/O Controller..............................................................................................................29
1.9.1 Serial Ports ..................................................................................................29
1.9.2 Infrared Support...........................................................................................30
1.9.3 Parallel Port..................................................................................................30
1.9.4 Diskette Drive Controller ..............................................................................31
1.9.5 Keyboard and Mouse Interface ....................................................................31
1.9.6 I/O Controller Option....................................................................................31
1.10 Audio Subsystem (Optional).......................................................................................32
1.10.1 Audio Connectors.........................................................................................33
1.10.2 Audio Subsystem Software..........................................................................33
1.11 LAN Subsystem (Optional).........................................................................................34
1.11.1 Intel®82562ET Platform LAN Connect Device.............................................34
1.11.2 RJ-45 LAN Connector with Integrated LEDs................................................34
1.11.3 LAN Subsystem Software ............................................................................35
1.12 CNR (Optional)...........................................................................................................35
1.13 Hardware Management Subsystem............................................................................36
1.13.1 Hardware Monitor Component (Optional).....................................................36
1.13.2 Fan Monitoring.............................................................................................36
1.13.3 Chassis Intrusion and Detection...................................................................37
1.14 Power Management ...................................................................................................37
1.14.1 ACPI.............................................................................................................37
1.14.2 Hardware Support........................................................................................41

Intel Desktop Board D845HV/D845WN Technical Product Specification
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2Technical Reference
2.1 Introduction.................................................................................................................45
2.2 Memory Map ..............................................................................................................45
2.3 I/O Map .....................................................................................................................46
2.4 DMA Channels ...........................................................................................................48
2.5 PCI Configuration Space Map....................................................................................48
2.6 Interrupts....................................................................................................................49
2.7 PCI Interrupt Routing Map..........................................................................................49
2.8 Connectors.................................................................................................................51
2.8.1 Back Panel Connectors................................................................................52
2.8.2 Internal I/O Connectors................................................................................55
2.8.3 External I/O Connectors...............................................................................68
2.9 Jumper Blocks............................................................................................................72
2.9.1 Front Panel Audio Connector/Jumper Block.................................................72
2.9.2 BIOS Setup Configuration Jumper Block......................................................73
2.10 Mechanical Considerations.........................................................................................74
2.10.1 D845HV Form Factor...................................................................................74
2.10.2 D845WN Form Factor..................................................................................75
2.10.3 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 ......................................................................80
2.12 Thermal Considerations..............................................................................................81
2.13 Reliability....................................................................................................................83
2.14 Environmental ............................................................................................................83
2.15 Regulatory Compliance ..............................................................................................84
2.15.1 Safety Regulations.......................................................................................84
2.15.2 EMC Regulations .........................................................................................84
2.15.3 Product Certification Markings (Board Level) ...............................................85
3Overview 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........................................................................................91
3.6.2 Custom Splash Screen.................................................................................91
3.7 Recovering BIOS Data...............................................................................................91

Contents
vii
3.8 Boot Options...............................................................................................................92
3.8.1 CD-ROM and Network Boot.........................................................................92
3.8.2 Booting Without Attached Devices...............................................................92
3.9 Fast Booting Systems with Intel®Rapid BIOS Boot....................................................92
3.9.1 Peripheral Selection and Configuration........................................................92
3.9.2 Intel Rapid BIOS Boot..................................................................................93
3.10 BIOS Security Features..............................................................................................94
4BIOS Setup Program
4.1 Introduction.................................................................................................................95
4.2 Maintenance Menu.....................................................................................................96
4.2.1 Extended Configuration Submenu................................................................97
4.3 Main Menu..................................................................................................................98
4.4 Advanced Menu..........................................................................................................99
4.4.1 PCI Configuration Submenu.......................................................................100
4.4.2 Boot Configuration Submenu .....................................................................101
4.4.3 Peripheral Configuration Submenu.............................................................102
4.4.4 IDE Configuration Submenu.......................................................................104
4.4.5 Diskette Configuration Submenu................................................................107
4.4.6 Event Log Configuration Submenu.............................................................108
4.4.7 Video Configuration Submenu....................................................................109
4.5 Security Menu ..........................................................................................................110
4.6 Power Menu.............................................................................................................111
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 .................................................................................................................117
5Error Messages and Beep Codes
5.1 BIOS Error Messages...............................................................................................119
5.2 Port 80h POST Codes..............................................................................................121
5.3 Bus Initialization Checkpoints...................................................................................125
5.4 Speaker (Optional) ...................................................................................................126
5.5 BIOS Beep Codes....................................................................................................126
Figures
1. D845HV Board Components ......................................................................................14
2. D845WN Board Components .....................................................................................15
3. Block Diagram............................................................................................................16
4. Intel 845 Chipset Block Diagram.................................................................................24
5. USB Port Configuration for Boards with the SMSC LPC47M142 I/O Controller..........26
6. USB Port Configuration for Boards with the SMSC LPC47M132 I/O Controller..........27
7. Audio Subsystem Block Diagram................................................................................32
8. ICH2 and CNR Signal Interface..................................................................................35
9. Location of the Optional Standby Power Indicator LED..............................................44

Intel Desktop Board D845HV/D845WN Technical Product Specification
viii
10. Back Panel Connectors..............................................................................................52
11. Audio Connectors.......................................................................................................56
12. Power and Hardware Control Connectors ..................................................................58
13. D845HV Add-in Board and Peripheral Interface Connectors......................................61
14. D845WN Add-in Board and Peripheral Interface Connectors.....................................62
15. External I/O Connectors.............................................................................................68
16. Location of the Jumper Block .....................................................................................72
17. D845HV Board Dimensions........................................................................................74
18. D845WN Board Dimensions.......................................................................................75
19. I/O Shield Dimensions (for boards with the LAN Subsystem).....................................76
20. I/O Shield Dimensions (for boards without the LAN Subsystem)................................77
21. Localized High Temperature Zones............................................................................82
Tables
1. Summary of Board Differences...................................................................................11
2. Feature Summary.......................................................................................................12
3. Manufacturing Options ...............................................................................................13
4. Specifications .............................................................................................................18
5. Supported Processors................................................................................................21
6. Supported Memory Configurations.............................................................................23
7. LAN Connector LED States........................................................................................34
8. Effects of Pressing the Power Switch.........................................................................38
9. Power States and Targeted System Power................................................................39
10. Wake-up Devices and Events.....................................................................................40
11. Fan Connector Function/Operation.............................................................................42
12. System Memory Map..................................................................................................45
13. I/O Map ......................................................................................................................46
14. DMA Channels ...........................................................................................................48
15. PCI Configuration Space Map....................................................................................48
16. Interrupts....................................................................................................................49
17. PCI Interrupt Routing Map..........................................................................................50
18. PS/2 Mouse/Keyboard Connector ..............................................................................53
19. USB Connectors.........................................................................................................53
20. Parallel Port Connector...............................................................................................53
21. Serial Port A Connector..............................................................................................54
22. LAN Connector (optional)...........................................................................................54
23. Audio Line In Connector (Optional).............................................................................54
24. Audio Line Out Connector (Optional)..........................................................................54
25. Mic In Connector (Optional)........................................................................................54
26. Telephony Connector (Optional).................................................................................57
27. Auxiliary Line In Connector (Optional) ........................................................................57
28. ATAPI CD-ROM Connector (Optional) .......................................................................57
29. ATX12V Power Connector..........................................................................................59
30. Rear Chassis Fan Connector .....................................................................................59
31. Processor Fan Connector...........................................................................................59
32. Main Power Connector...............................................................................................60
33. Chassis Intrusion Connector.......................................................................................60

Contents
ix
34. Front Chassis Fan Connector (Optional) ....................................................................60
35. CNR Connector..........................................................................................................63
36. PCI Bus Connectors...................................................................................................64
37. AGP Connector ..........................................................................................................65
38. Diskette Drive Connector............................................................................................66
39. PCI IDE Connectors...................................................................................................67
40. SCSI LED Connector (Optional).................................................................................67
41. Front Panel Audio Connector .....................................................................................69
42. Serial Port B Connector (Optional) .............................................................................69
43. Front Panel USB Connector.......................................................................................69
44. Auxiliary Front Panel Power/Sleep/Message-Waiting LED Connector........................69
45. Front Panel Connector ...............................................................................................70
46. States for a One-Color Power LED.............................................................................71
47. States for a Two-Color Power LED.............................................................................71
48. Front Panel Audio Connector / Jumper Block.............................................................73
49. BIOS Setup Configuration Jumper Settings................................................................73
50. Power Usage..............................................................................................................78
51. Standby Current Requirements..................................................................................79
52. Fan Connector Current Capability ..............................................................................80
53. Thermal Considerations for Components ...................................................................82
54. D845HV/D845WN Board Environmental Specifications..............................................83
55. Safety Regulations .....................................................................................................84
56. EMC Regulations........................................................................................................84
57. Supervisor and User Password Functions..................................................................94
58. BIOS Setup Program Menu Bar .................................................................................95
59. BIOS Setup Program Function Keys ..........................................................................96
60. Maintenance Menu.....................................................................................................96
61. Extended Configuration Submenu..............................................................................97
62. Main Menu..................................................................................................................98
63. Advanced Menu..........................................................................................................99
64. PCI Configuration Submenu.....................................................................................100
65. Boot Configuration Submenu....................................................................................101
66. Peripheral Configuration Submenu...........................................................................102
67. IDE Configuration Submenu.....................................................................................104
68. Primary/Secondary IDE Master/Slave Submenus.....................................................105
69. Diskette Configuration Submenu..............................................................................107
70. Event Log Configuration Submenu...........................................................................108
71. Video Configuration Submenu..................................................................................109
72. Security Menu ..........................................................................................................110
73. Power Menu.............................................................................................................111
74. ACPI Submenu.........................................................................................................112
75. Boot Menu................................................................................................................113
76. Boot Device Priority Submenu..................................................................................114
77. Hard Disk Drives Submenu ......................................................................................115
78. Removable Devices Submenu..................................................................................115
79. ATAPI CD-ROM Drives Submenu............................................................................116
80. Exit Menu .................................................................................................................117
81. BIOS Error Messages...............................................................................................119

Intel Desktop Board D845HV/D845WN Technical Product Specification
x
82. Uncompressed INIT Code Checkpoints....................................................................121
83. Boot Block Recovery Code Checkpoints ..................................................................121
84. Runtime Code Uncompressed in F000 Shadow RAM ..............................................122
85. Bus Initialization Checkpoints...................................................................................125
86. Upper Nibble High Byte Functions............................................................................125
87. Lower Nibble High Byte Functions............................................................................126
88. Beep Codes..............................................................................................................127

11
1 Product Description
What This Chapter Contains
1.1 Board Differences.......................................................................................................11
1.2 Overview ....................................................................................................................12
1.3 Online Support ...........................................................................................................17
1.4 Operating System Support.........................................................................................17
1.5 Design Specifications .................................................................................................18
1.6 Processor...................................................................................................................21
1.7 System Memory .........................................................................................................22
1.8 Intel®845 Chipset.......................................................................................................24
1.9 I/O Controller..............................................................................................................29
1.10 Audio Subsystem (Optional).......................................................................................32
1.11 LAN Subsystem (Optional).........................................................................................34
1.12 CNR (Optional)...........................................................................................................35
1.13 Hardware Management Subsystem............................................................................36
1.14 Power Management ...................................................................................................37
1.1 Board Differences
This TPS describes these Intel®Desktop boards: D845HV and D845WN. The boards are identical
with the exception of the items listed below. Table 1 summarizes the differences between these
boards.
Table 1. Summary of Board Differences
D845HV • microATX Form Factor (9.60 inches by 9.60 inches)
• Three PCI bus connectors
Refer also to Table 3, page 13 for a list of manufacturing options specific to D845HV
board only
D845WN • ATX Form Factor (12.00 inches by 9.60 inches)
• Six PCI bus connectors
✏NOTE
Most of the illustrations in this document show only the D845HV board. When there are
significant differences between the two boards, illustrations of both boards are provided.

Intel Desktop Board D845HV/D845WN Technical Product Specification
12
1.2 Overview
1.2.1 Feature Summary
Table 2 summarizes the D845HV and D845WN boards’ major features.
Table 2. Feature Summary
Form Factor D845HV: microATX (9.60 inches by 9.60 inches)
D845WN: ATX (12.00 inches by 9.60 inches)
Processor • Support for an Intel®Pentium®4 processor in an mPGA478 socket
• 400 MHz system bus
Memory
(Refer also to
Table 3, page 13)
• Three 168-pin SDRAM Dual Inline Memory Module (DIMM) sockets
• Support for single-sided or double-sided DIMMs (PC133 only)
• Support for up to 3 GB system memory
NOTE: The D845HV/D845WN boards have been designed to support DIMMs
based on 512 Mbit technology for a maximum onboard capacity of up to 3
GB, but this technology has not been validated on this board. Please refer
to the following Intel web sites. For the D845HV board:
http://developer.intel.com/design/motherbd/hv/hv_mem.htm
For the D845WN board:
http://developer.intel.com/design/motherbd/wn/wn_mem.htm
Chipset Intel®845 Chipset, consisting of:
• Intel®82845 Memory Controller Hub (MCH)
• Intel®82801BA I/O Controller Hub (ICH2)
• Intel®82802AB 4 Mbit Firmware Hub (FWH)
Video AGP connector supporting 1.5 V 4X AGP cards
I/O Control
(Refer also to
Table 3, page 13)
SMSC LPC47M142 LPC Bus I/O controller
Peripheral
Interfaces
(Refer also to
Table 3, page 13)
• Up to seven Universal Serial Bus (USB) ports
• Two serial ports
• One parallel port
• IrDA†-compliant infrared port
• Two IDE interfaces with UDMA 33, ATA-66/100 support
• One diskette drive interface
• PS/2†keyboard and mouse ports
• Three fan connectors
Expansion
Capabilities • D845HV: Three PCI bus add-in card connectors (SMBus routed to PCI bus
connector 1)
• D845WN: Six PCI bus add-in card connectors (SMBus routed to PCI bus
connector 1)
BIOS • Intel/AMI BIOS (resident in the Intel 82802AB 4 Mbit FWH)
• Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,
and SMBIOS
continued

Product Description
13
Table 2. Feature Summary (continued)
Instantly Available
PC Technology • 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 board’s compliance level with ACPI, Plug and Play, and SMBIOS. Section 1.4, page 17
1.2.2 Manufacturing Options
Table 3 describes the D845HV and D845WN boards’ manufacturing options. Not every
manufacturing option is available in all marketing channels. Please contact your Intel
representative to determine which manufacturing options are available to you.
Table 3. Manufacturing Options
Audio Audio subsystem for AC 97 processing using the Analog Devices AD1885 codec
CNR One Communication and Networking Riser (CNR) connector (slot shared with
PCI bus connector 3 on the D845HV board and with PCI bus connector 6 on the
D845WN board)
LAN Intel®82562ET 10/100 Mbit/sec Platform LAN Connect (PLC) device
Hardware Monitor
Subsystem • 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
The items listed below are component changes for an alternate configuration of the D845HV board
• Delete the auxiliary front panel power/sleep/message-waiting LED connector (shown on page 68)
• Delete the front chassis fan connector (shown on page 58)
• Delete the Mic-in pre-amp for boards equipped with the audio subsystem (described on page 32)
• Delete the SCSI hard drive activity LED connector (shown on pages 61 and 62)
• Delete the serial port B connector (shown on page 68)
• Delete the standby power indicator LED (shown on page 44)
• Delete the third DIMM socket (shown on pages 14 and 15)
• Delete the two USB connectors adjacent to the PS/2 connectors on the back panel (shown on page 52)
• Delete the 47 Ωinductive speaker (described on page 126)
• Replace I/O controller with SMSC LPC47M132 LPC bus I/O controller (functionally equivalent to SMSC
LPC47M142 LPC bus I/O controller but without an integrated USB hub) (described on page 31)
For information about Refer to
Available configurations of the D845HV and D845WN boards Section 1.3, page 17
✏NOTE
The LAN and the CNR manufacturing options are mutually exclusive.

Intel Desktop Board D845HV/D845WN Technical Product Specification
14
1.2.3 Board Layouts
Figure 1 shows the location of the major components on the D845HV board.
OM11427
D
G
F
E
OJ
NKM
R
CA
I
S
H
Q
P
L
B
A Audio codec (optional) K Diskette drive connector
B Intel 82562ET PLC Device (optional) L IDE connectors
C AGP connector M Speaker (optional)
D Back panel connectors N Intel 82801BA I/O Controller Hub (ICH2)
E +12V power connector (ATX12V) O Intel 82802AB 4 Mbit Firmware Hub (FWH)
F Intel 82845 Memory Controller Hub (MCH) P Front panel connector
G mPGA478 processor socket Q Battery
H DIMM sockets R PCI bus add-in card connectors
I I/O Controller S CNR connector (optional)
J Power Connector
Figure 1. D845HV Board Components

Product Description
15
Figure 2 shows the location of the major components on the D845WN board.
OM11426
D
G
F
E
OJ
NKM
R
CA
I
S
H
Q
P
L
B
A Audio codec (optional) K Diskette drive connector
B Intel 82562ET PLC Device (optional) L IDE connectors
C AGP connector M Speaker (optional)
D Back panel connectors N Intel 82801BA I/O Controller Hub (ICH2)
E +12V power connector (ATX12V) O Intel 82802AB 4 Mbit Firmware Hub (FWH)
F Intel 82845 Memory Controller Hub (MCH) P Front panel connector
G mPGA478 processor socket Q Battery
H DIMM sockets R PCI bus add-in card connectors
I I/O Controller S CNR connector (optional)
J Power Connector
Figure 2. D845WN Board Components

Intel Desktop Board D845HV/D845WN Technical Product Specification
16
1.2.4 Block Diagram
Figure 3 is a block diagram of the major functional areas of the D845HV and D845WN boards.
D845WN
Only
845 Chipset
82801BA
I/O Controller Hub
(ICH2)
82845 Memory
Controller Hub
(MCH)
82802AB 4 Mbit
Firmware Hub
(FWH)
AHA
Bus
System Bus
(400 MHz)
mPGA478
Processor Socket
Primary/
Secondary IDE
Diskette Drive
Connector
LPC I/O
Controller PS/2 Keyboard
PS/2 Mouse
Parallel Port
Serial Ports
UDMA 33 and
ATA-66/100
USB
LPC
Bus
Hardware
Monitor
(optional)
OM12274
Back Panel
USB Ports (2)
AD1885
Audio Codec
(optional) Auxiliary Line In
Mic In
Line Out
CD-ROM
Line In
CNR
Connector
(optional)
LAN
Connector
(optional)
Physical
Layer
Interface
(optional)
PCI Slot 1
PCI Slot 2
PCI Slot 3
PCI Slot 4
PCI Slot 5
CSMA/CD
Unit Interface
DIMM Banks (3)
AGP
Interface
4X AGP
Connector
(1.5 V only)
= connector or socket
Telephony
PCI Bus
PCI Slot 6
SMBus
AC Link
USB
SDRAM
Bus
Back Panel
USB Ports (2)
Front Panel
USB Ports (2)
USB
USB
Infrared Port
Figure 3. Block Diagram

Product Description
17
1.3 Online Support
To find information about… Visit this World Wide Web site:
Intel’s D845HV and D845WN boards
under “Product Info” or “Customer
Support”
http://www.intel.com/design/motherbd
http://support.intel.com/support/motherboards/desktop
Available configurations for the D845HV
board http://developer.intel.com/design/motherbd/hv/hv_available.htm
Available configurations for the D845WN
board http://developer.intel.com/design/motherbd/wn/wn_available.htm
Processor data sheets http://www.intel.com/design/litcentr
Proper date access in systems with
Intel®desktop boards http://support.intel.com/support/year2000
ICH2 addressing http://developer.intel.com/design/chipsets/datashts
Custom splash screens http://intel.com/design/motherbd/gen_indx.htm
Audio software and utilities http://www.intel.com/design/motherbd
LAN software and drivers http://www.intel.com/design/motherbd
1.4 Operating System Support
The D845HV and D845WN boards support drivers for all of the onboard hardware and subsystems
under the following operating systems:
• Microsoft Windows†98SE
• Windows ME
• Windows NT†4.0
• Windows†2000
• Windows XP
For information about Refer to
Supported drivers Section 1.3
✏NOTE
Third party vendors may offer other drivers.

Intel Desktop Board D845HV/D845WN Technical Product Specification
18
1.5 Design Specifications
Table 4 lists the specifications applicable to the D845HV and D845WN boards.
Table 4. Specifications
Reference
Name Specification Title Version, Revision Date, and Ownership The information is available from…
AC ’ 97 Audio Codec ’97 Revision 2.2,
September 2000,
Intel Corporation.
ftp://download.intel.com/ial/
scalableplatforms/ac97r22.pdf
ACPI Advanced Configuration
and Power Interface
Specification
Version 2.0,
July 27, 2000,
Compaq Computer
Corporation,
Intel Corporation,
Microsoft Corporation,
Phoenix Technologies
Limited, and
Toshiba Corporation.
http://www.teleport.com/~acpi/
AGP Accelerated Graphics Port
Interface Specification
Revision 2.0,
May 4, 1998,
Intel Corporation.
http://www.agpforum.org/
AMI BIOS American Megatrends
BIOS Specification
AMIBIOS 99,
1999,
American Megatrends, Inc.
http://www.amij.com/amibios/
bios.platforms.desktop.html
ATA/
ATAPI-5
Information Technology-AT
Attachment with Packet
Interface - 5
( ATA/ATAPI-5)
Revision 3,
February 29, 2000,
Contact: T13 Chair,
Seagate Technology.
http://www.t13.org
ATX ATX Specification Version 2.03,
December 1998,
Intel Corporation.
http://www.formfactors.org/
developer/specs/atx/
atxspecs.htm
ATX12V ATX / ATX12V Power
Supply Design Guide
Version 1.1,
August 2000,
Intel Corporation.
http://www.formfactors.org/dev
eloper/specs/atx/
atxspecs.htm
CNR
Communication and
Network Riser (CNR)
Specification
Revision 1.1,
October 18, 2000,
Intel Corporation.
http://developer.intel.com/
technology/cnr/index.htm
continued

Product Description
19
Table 4. Specifications (continued)
Reference
Name Specification Title Version, Revision Date and Ownership The information is available from…
EPP IEEE Std 1284.1-1997
(Enhanced Parallel Port)
Version 1.7,
1997,
Institute of Electrical and
Electronic Engineers.
http://standards.ieee.org/
reading/ieee/std_public/
description/busarch/
1284.1-1997_desc.html
El Torito Bootable CD-ROM
Format Specification
Version 1.0,
January 25, 1995,
Phoenix Technologies Limited
and International Business
Machines Corporation.
http://www.phoenix.com/
PlatSS/products/specs.html
IrDA
IrDA Serial Physical
Layer Specification
Version 1.3,
October 15, 1998,
Infrared Data Association.
http://www.irda.org/
standards/
specifications.asp
LPC Low Pin Count Interface
Specification
Version 1.0,
September 29, 1997,
Intel Corporation.
http://www.intel.com/
design/chipsets/industry/
lpc.htm
MicroATX microATX Motherboard
Interface Specification
Version 1.0,
December 1997,
Intel Corporation.
http://www.formfactors.org/
developer/specs/microatx/
microatxspecs.htm
PCI PCI Local Bus
Specification
Version 2.2,
December 18, 1998,
PCI Special Interest Group.
http://www.pcisig.com/
PCI Bus Power
Management Interface
Specification
Version 1.1,
December 18, 1998,
PCI Special Interest Group.
http://www.pcisig.com/
Plug and
Play
Plug and Play BIOS
Specification
Version 1.0a,
May 5, 1994,
Compaq Computer Corporation,
Phoenix Technologies Limited,
and Intel Corporation.
http://www.microsoft.com/
hwdev/respec/
pnpspecs.htm
PXE Preboot Execution
Environment
Version 2.1,
September 1999,
Intel Corporation.
ftp://download.intel.com/ial/
wfm/pxespec.pdf
continued

Intel Desktop Board D845HV/D845WN Technical Product Specification
20
Table 4. Specifications (continued)
Reference
Name Specification Title Version, Revision Date and Ownership The information is available from…
SDRAM PC SDRAM Unbuffered
DIMM Specification
Revision 1.0,
February 1998,
Intel Corporation.
http://www.intel.com/
technology/memory
PC SDRAM Specification Revision 1.7,
November 1999,
Intel Corporation.
http://www.intel.com/
technology/memory
PC Serial Presence
Detect (SPD)
Specification
Revision 1.2B,
November 1999,
Intel Corporation.
http://www.intel.com/
technology/memory
SFX SFX/SFX12V Power
Supply Design Guide
Revision 2.0,
May 2001,
Intel Corporation.
http://www.formfactors.org
/developer/specs/sfx/
sfx12v.pdf
SMBIOS System Management
BIOS
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.
http://www.dmtf.org/
download/standards/
DSP0119.pdf
UHCI Universal Host Controller
Interface Design Guide
Revision 1.1,
March 1996,
Intel Corporation.
http://www.usb.org/
developers
USB Universal Serial Bus
Specification
Version 1.1,
September 23, 1998,
Compaq Computer Corporation,
Intel Corporation,
Microsoft Corporation, and
NEC Corporation.
http://www.usb.org/
developers
WfM Wired for Management
Baseline
Version 2.0,
December 18, 1998,
Intel Corporation.
http://developer.intel.com/
ial/WfM/wfmspecs.htm