Intel D845HV User manual

Intel®Desktop Board
D845HV
Specification Update
Release Date: October 2002
Order Number: A73418-013
The IntelDesktop Board D845HV may contain design defects or errors known as errata which
may cause the product to deviate from published specifications. Current characterized errata are
documented in this Specification Update.

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applications.
Intel may make changes to specifications and product descriptions at any time, without notice.
Designers must not rely on the absence or characteristics of any features or instructions marked “reserved”or “undefined”.
Intel reserves these for future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from
future changes to them.
The Inteldesktop board D845HV may contain design defects or errors known as errata which may cause the product to
deviate from published specifications. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications before placing your product order.
Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be
obtained from:
Intel Corporation
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Denver, CO 80217-9808
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* Other names and brands may be claimed as the property of others.
Copyright 2001, 2002, Intel Corporation.

CONTENTS
REVISION HISTORY ...................................................................................................................................v
PREFACE ...................................................................................................................................................vi
Specification Update for the IntelDesktop Board D845HV
GENERAL INFORMATION ..........................................................................................................................3
SPECIFICATION CHANGES .......................................................................................................................6
ERRATA.....................................................................................................................................................14
SPECIFICATION CLARIFICATIONS..........................................................................................................16
DOCUMENTATION CHANGES .................................................................................................................20

IntelDesktop Board D845HV Specification Update
v
REVISION HISTORY
Date of Revision Version Description
September 2001 -001 This document is the first Specification Update for the
IntelDesktop Board D845HV.
October 2001 -002 Added Erratum 1.
November 2001 -003 Updated Erratum 1.
December 2001 -004 Added Specification Change 1.
January 2002 -005 Updated General Information section. Added Erratum 2. Added
Specification Clarifications 1, 2.
February 2002 -006 Added Erratum 3. Updated General Information.
March 2002 -007 Added Specification Change 2.
April 2002 -008 Added Specification Change 3. Added Erratum 4.
June 2002 -009 Added Documentation Change 1.
July 2002 -010 Added Specification Clarification 3. Added Documentation
Change 2.
August 2002 -011 Added Specification Change 4. Removed Printed Board
Assembly (PBA) information from the document, as this reference
is no longer valid.
September 2002 -012 Added Specification Change 5. Updated the Legal Disclaimer
Section.
October 2002 -013 Added Specification Change 6. Added Erratum 5. Added
Documentation Changes 3, 4.

IntelDesktop Board D845HV Specification Update
v
i
PREFACE
This document is an update to the specifications contained in the IntelDesktop Board D845HV Technical
Product Specification (Order number A65136). It is intended for hardware system manufacturers and
software developers of applications, operating systems, or tools. It will contain Specification Changes,
Errata, Specification Clarifications, and Documentation Changes.
Refer to the Intel
Pentium4 Processor Specification Update (Order number 249199) for specification
updates concerning the Intel Pentium 4 processor and that may apply to the desktop board D845HV. Unless
otherwise noted in this document, it should be assumed that any processor errata for a given stepping are
applicable to the Altered Assembly (AA) revision(s) associated with that stepping.
Refer to the Intel
82845 Chipset: 82845 Memory Controller Hub (MCH) for SDR Specification Update (Order
Number 298589) for specification updates concerning the 82845 MCH Controller and that may apply to the
desktop board D845HV. Unless otherwise noted in this document, it should be assumed that any MCH
errata for a given stepping are applicable to the Altered Assembly (AA) revision(s) associated with that
stepping.
Refer to the Intel
82801BA I/O Controller Hub 2 (ICH2) and Intel 82801BAM I/O Controller Hub 2 Mobile
(ICH2-M) Specification Update (Order Number 298242) for specification updates concerning the 82801BA I/O
Controller Hub and that may apply to the desktop board D845HV. Unless otherwise noted in this document,
it should be assumed that any 82801BA I/O Controller Hub (ICH) errata for a given stepping are applicable to
the Altered Assembly (AA) revision(s) associated with that stepping.
Nomenclature
Specification Changes are modifications to the current published specifications. These changes will be
incorporated in the next release of the specifications.
Errata are design defects or errors. Characterized errata may cause the desktop board D845HV’s behavior
to deviate from published specifications. Hardware and software designed to be used with any given Altered
Assembly (AA) and BIOS revision level must assume that all errata documented for that AA and BIOS
revision level are present on all desktop boards.
Specification Clarifications describe a specification in greater detail or further highlight a specification’s
impact to a complex design situation. These clarifications will be incorporated in the next release of the
specifications.
Documentation Changes include typos, errors, or omissions from the current published specifications.
These changes will be incorporated in the next release of the specifications.

Specification Update for the
Intel®Desktop Board D845HV

IntelDesktop Board D845HV Specification Update
3
GENERAL INFORMATION
Basic Desktop Board D845HV Identification Information
AA Revision BIOS Revision Notes
A68838-304 HV84510A.86A.0018.P04 1-5
A68838-306 HV84510A.86A.0022.P05 1-5
A68838-307 HV84510A.86A.0029.P07 1-5
A68838-308 HV84510A.86A.0029.P07 1-5
A68838-400 HV84510A.86A.0038.P10 1-5
A68840-305 HV84510A.86A.0018.P04 1-5
A68840-307 HV84510A.86A.0022.P05 1-5
A68840-308 HV84510A.86A.0029.P07 1-5
A68840-309 HV84510A.86A.0029.P07 1-5
A68840-400 HV84510A.86A.0038.P10 1-5
A63927-304 HV84510A.86A.0018.P04 1-5
A63927-305 HV84510A.86A.0022.P05 1-5
A63927-306 HV84510A.86A.0029.P07 1-5
A63927-307 HV84510A.86A.0029.P07 1-5
A63927-400 HV84510A.86A.0038.P10 1-5
A63929-305 HV84510A.86A.0018.P04 1-5
A63929-306 HV84510A.86A.0022.P05 1-5
A63929-307 HV84510A.86A.0029.P07 1-5
A63929-308 HV84510A.86A.0029.P07 1-5
A63929-400 HV84510A.86A.0038.P10 1-5
A69283-301 HV84510A.86A.0018.P04 1-5
A69283-302 HV84510A.86A.0018.P04 1-5
A69283-303 HV84510A.86A.0029.P07 1-5
A69283-304 HV84510A.86A.0029.P07 1-5
A69283-400 HV84510A.86A.0038.P10 1-5
A70828-303 HV84510A.86A.0022.P05 1-5
A70828-304 HV84510A.86A.0022.P05 1-5
A70828-305 HV84510A.86A.0029.P07 1-5
A70828-306 HV84510A.86A.0029.P07 1-5
A70828-400 HV84510A.86A.0038.P10 1-5

IntelDesktop Board D845HV Specification Update
4
NOTES:
1. The AA number is found on a small label on the component side of the board.
2. The 82845 Chipset kit used on this AA revision consists of three components as follows:
Device Stepping S-Spec Numbers
RG82845 MCH A3
B0
SL5V7
SL63W
SL5YQ
82801BA ICH C0
B5
SL5PN
SL5WK
N82802AB 4Mbit FWH A1 SB48
3. Refer to the Intel
Pentium4 Processor Specification Update (Order Number 249199) for errata related to the Pentium 4
processor and that may apply to the desktop board D845HV.
4. Refer to the Intel
82845 Chipset: 82845 Memory Controller Hub (MCH) for SDR Specification Update (Order Number
298589) for errata related to the 82845 MCH that may apply to the desktop board D845HV.
5. Refer to the Intel
82801BA I/O Controller Hub 2 (ICH2) and Intel 82801BAM I/O Controller Hub 2 Mobile (ICH2-M)
Specification Update (Order Number 298242) for errata related to the 82801BA I/O Controller Hub that may apply to the
desktop board D845HV.

IntelDesktop Board D845HV Specification Update
5
Summary Table of Changes
The following table indicates the Specification Changes, Errata, Specification Clarifications, or Documentation
Changes that apply to the desktop board D845HV. Intel intends to fix some of the errata in a future revision
of the desktop board, and to account for the other outstanding issues through documentation or specification
changes as noted. This table uses the following notations:
CODES USED IN SUMMARY TABLE
Doc: Document change or update that will be implemented.
PlanFix: This erratum is intended to be fixed in a future revision of the desktop board,
driver, or BIOS.
Fixed: This erratum has been previously fixed.
NoFix: There are no plans to fix this erratum.
Shaded: This erratum is either new or modified from the previous version of the document.
NO. PLANS SPECIFICATION CHANGES
1 Doc Change to description of Section 1.6, processors
2 Doc Support for faster IntelPentium4 processors
3 Doc Support for additional Intel Pentium 4 processors
4 Doc Support for faster Intel Pentium 4 processors; Add support for IntelCeleronprocessors
5 Doc Support for faster Intel Celeron processor
6 Doc Support for faster Intel Pentium 4 processors
NO. PLANS ERRATA
1 Fixed Certain PCI Add-in devices may not be recognized
2 Fixed A system hang during POST may occur when using a Pentium 4 processor at a speed of
1.6 GHz in conjunction with a single SDRAM DIMM configuration.
3 Fixed System hang during POST may occur when using certain USB cameras
4 Fixed System cannot enter ACPI S3 sleep state with BIOS Revisions HV84510A.86A.0024.P06
and HV84510A.86A.0029.P07 while using the Windows* 98SE operating system
5 Fixed Wake from an ACPI sleep state using wake methodologies may fail
NO. PLANS SPECIFICATION CLARIFICATIONS
1 Doc Change to description of Section 2.6, Interrupts
2 Doc Change to description of Section 2.7, PCI Interrupt Routing Map
3 Doc Change to description of Section 3.8.1, CD-ROM and Network Boot
NO. PLANS DOCUMENTATION CHANGES
1 Doc Change to description of Section 1.13.3, Chassis Intrusion And Detection
2 Doc Addition of section 3.8.3, Changing the Default Boot Device During POST
3 Doc Change to section 1.13.3, Chassis Intrusion
4 Doc Addition to section 4.5, Security Menu BIOS setup options

IntelDesktop Board D845HV Specification Update
6
SPECIFICATION CHANGES
The Specification Changes listed in this section apply to the Desktop Board D845HV Technical Product
Specification (Order Number A65136). All Specification Changes will be incorporated into a future version of
that specification.
1. Change to Description of Section 1.6, Processors
Section 1.6, Processors, removes support for the 1.4 GHz Pentium4 processor and will change in its
entirety as follows:
1.6 Processor
CAUTION
Use only the processors listed below. Use of unsupported processors can
damage the board, the processor, and the power supply. See the Intel®Desktop
Board D845HV/D845WN Specification Update for the most up-to-date list of
supported processors for these boards.
The D845HV and D845WN boards support a single Pentium®4processor (in an
mPGA478 socket) with a system bus of 400 MHz. The D845HV and D845WN
boards support the processors listed in Table 5. All supported onboard memory
can be cached, up to the cachability limit of the processor. See the processor’s
data sheet for cachability limits.
Table 5. Supported Processors
Type Designation System Bus L2 Cache Size
Pentium®4
processor
1.5, 1.6, 1.7, 1.8, 1.9,
and 2.0 GHz
400 MHz 256 KB
✏ NOTE
Use only ATX12V- or SFX12V-compliant power supplies with the D845HV and
D845WN boards. ATX12V and SFX12V power supplies have an additional
power lead that provides required supplemental power for the Intel®Pentium 4
processor. Always connect the 20-pin and 4-pin leads of ATX12V and SFX12V
power supplies to the corresponding connectors on the D845HV and D845WN
boards, otherwise the board will not boot.

IntelDesktop Board D845HV Specification Update
7
Do not use a standard ATX power supply. The board will not boot with a
standard ATX power supply.
For information about Refer to
Processor support Section 1.3, page 17
Processor usage Section 1.3, page 17
Power supply connectors Section 2.8.2.3, page 58
2. Support For Faster IntelPentium4 Processors
Section 1.6, Processor, will change in its entirety as follows:
1.6 Processor
CAUTION
Use only the processors listed below. Use of unsupported processors can
damage the board, the processor, and the power supply. See the Intel®Desktop
Board D845HV/D845WN Specification Update for the most up-to-date list of
supported processors for these boards.
The D845HV and D845WN boards support a single Pentium®4processor (in an
mPGA478 socket) with a system bus of 400 MHz. The D845HV and D845WN
boards support the processors listed in Table 1. All supported onboard memory
can be cached, up to the cachability limit of the processor. See the processor’s
data sheet for cachability limits.
Table 1. Supported Processors
Type Designation System Bus L2 Cache Size
Pentium®4 processor 1.4, 1.5, 1.6, 1.7, 1.8,
1.9, and 2.0 GHz
400 MHz 256 KB
2.0 and 2.1 GHz 400 MHz 512 KB

IntelDesktop Board D845HV Specification Update
8
✏ NOTE
Use only ATX12V- or SFX12V-compliant power supplies with the D845HV and
D845WN boards. ATX12V and SFX12V power supplies have an additional
power lead that provides required supplemental power for the Intel®Pentium®4
processor. Always connect the 20-pin and 4-pin leads of ATX12V and SFX12V
power supplies to the corresponding connectors on the D845HV and D845WN
boards, otherwise the board will not boot.
Do not use a standard ATX power supply. The board will not boot with a
standard ATX power supply.
For information about Refer to
Processor support Section 1.3, page 17
Processor usage Section 1.3, page 17
Power supply connectors Section 2.8.2.3, page 58
3. Support For Additional IntelPentium4 Processors
Section 1.6, Processor, will change in its entirety as follows:
1.6 Processor
CAUTION
Use only the processors listed below. Use of unsupported processors can
damage the board, the processor, and the power supply. See the Intel®Desktop
Board D845HV/D845WN Specification Update for the most up-to-date list of
supported processors for these boards.
The D845HV and D845WN boards support a single Pentium 4processor (in an
mPGA478 socket) with a system bus of 400 MHz. The D845HV and D845WN
boards support the processors listed in Table 2. All supported onboard memory
can be cached, up to the cachability limit of the processor. See the processor’s
data sheet for cachability limits.

IntelDesktop Board D845HV Specification Update
9
Table 2. Supported Processors
Type Designation System Bus L2 Cache Size
Pentium®4
processor
1.4, 1.5, 1.6, 1.7, 1.8, 1.9,
and 2.0 GHz
400 MHz 256 KB
1.6, 1.8, 2.0 and 2.2 GHz 400 MHz 512 KB
✏ NOTE
Use only ATX12V or SFX12Vcompliant power supplies with the D845HV and
D845WN boards. ATX12V and SFX12V power supplies have an additional
power lead that provides required supplemental power for the Intel®Pentium®4
processor. Always connect the 20-pin and 4-pin leads of ATX12V and SFX12V
power supplies to the corresponding connectors on the D845HV and D845WN
boards, otherwise the board will not boot.
Do not use a standard ATX power supply. The board will not boot with a
standard ATX power supply.
For information about Refer to
Processor support Most recent D845HV
Specification Update
Processor usage Section 1.3, page 17
Power supply connectors Section 2.8.2.3, page 58
4. Support For Faster IntelPentium4 Processors; Add Support For
IntelCeleronProcessors
Section 1.6, Processor, will change in its entirety as follows:
1.6 Processor
CAUTION
Use only the processors listed below. Use of unsupported processors can
damage the board, the processor, and the power supply. See the Intel®Desktop

IntelDesktop Board D845HV Specification Update
10
Board D845HV/D845WN Specification Update for the most up-to-date list of
supported processors for these boards.
The D845HV and D845WN boards support a single Pentium®4processor or
Celeron®Processor (in an mPGA478 socket) with a system bus of 400 MHz.
The D845HV and D845WN boards support the processors listed in Table 2. All
supported onboard memory can be cached, up to the cachability limit of the
processor. See the processor’s data sheet for cachability limits.
Table 2. Supported Processors
Type Designation System Bus L2 Cache Size
Pentium®4
processor
1.4, 1.5, 1.6, 1.7, 1.8, 1.9,
and 2.0 GHz
400 MHz 256 KB
1.6, 1.8, 2.0, 2.2, and
2.4 GHz
400 MHz 512 KB
Celeron®
processor
1.7 GHz 400 MHz 128 KB
✏ NOTE
Use only ATX12V or SFX12Vcompliant power supplies with the D845HV and
D845WN boards. ATX12V and SFX12V power supplies have an additional
power lead that provides required supplemental power for the Intel®Pentium 4
processor. Always connect the 20-pin and 4-pin leads of ATX12V and SFX12V
power supplies to the corresponding connectors on the D845HV and D845WN
boards, otherwise the board will not boot.
Do not use a standard ATX power supply. The board will not boot with a
standard ATX power supply.
For information about Refer to
Processor support Most recent D845HV
Specification Update
Processor usage Section 1.3, page 17
Power supply connectors Section 2.8.2.3, page 58

IntelDesktop Board D845HV Specification Update
11
5. Support For Faster IntelCeleronProcessor
Section 1.6, Processor, will change in its entirety as follows:
1.6 Processor
CAUTION
Use only the processors listed below. Use of unsupported processors can
damage the board, the processor, and the power supply. See the Intel®Desktop
Board D845HV/D845WN Specification Update for the most up-to-date list of
supported processors for these boards.
The D845HV and D845WN boards support a single Pentium®4processor or
Celeron®Processor (in an mPGA478 socket) with a system bus of 400 MHz.
The D845HV and D845WN boards support the processors listed in Table 2. All
supported onboard memory can be cached, up to the cachability limit of the
processor. See the processor’s data sheet for cachability limits.
Table 2. Supported Processors
Type Designation System Bus L2 Cache Size
Pentium®4
processor
1.4, 1.5, 1.6, 1.7, 1.8, 1.9,
and 2.0 GHz
400 MHz 256 KB
1.6, 1.8, 2.0, 2.2, and
2.4 GHz
400 MHz 512 KB
Celeron®
processor
1.7 and 1.8 GHz 400 MHz 128 KB
✏ NOTE
Use only ATX12V or SFX12Vcompliant power supplies with the D845HV and
D845WN boards. ATX12V and SFX12V power supplies have an additional
power lead that provides required supplemental power for the Intel®Pentium 4
processor. Always connect the 20-pin and 4-pin leads of ATX12V and SFX12V
power supplies to the corresponding connectors on the D845HV and D845WN
boards, otherwise the board will not boot.
Do not use a standard ATX power supply. The board will not boot with a
standard ATX power supply.

IntelDesktop Board D845HV Specification Update
12
For information about Refer to
Processor support Most recent D845HV
Specification Update
Processor usage Section 1.3, page 17
Power supply connectors Section 2.8.2.3, page 58
6. Support For Faster IntelPentium4 Processors
Section 1.6, Processor, will change in its entirety as follows:
1.6 Processor
CAUTION
Use only the processors listed below. Use of unsupported processors can
damage the board, the processor, and the power supply. See the Intel®Desktop
Board D845HV/D845WN Specification Update for the most up-to-date list of
supported processors for these boards.
The D845HV and D845WN boards support a single Pentium®4processor or
Celeron®Processor (in an mPGA478 socket) with a system bus of 400 MHz.
The D845HV and D845WN boards support the processors listed in Table 2. All
supported onboard memory can be cached, up to the cachability limit of the
processor. See the processor’s data sheet for cachability limits.
Table 2. Supported Processors
Type Designation System Bus L2 Cache Size
Pentium®4
processor
1.4, 1.5, 1.6, 1.7, 1.8, 1.9,
and 2 GHz
400 MHz 256 KB
1.6A, 1.8A, 2A, 2.20, 2.40,
2.50, and 2.60 GHz
400 MHz 512 KB
Celeron®
processor
1.7 and 1.8 GHz 400 MHz 128 KB

IntelDesktop Board D845HV Specification Update
13
✏ NOTE
BIOS revision HV84510A.86A.0041.P12 or later is required to support 2.50 GHz
and higher processors.
✏ NOTE
Use only ATX12V or SFX12Vcompliant power supplies with the D845HV and
D845WN boards. ATX12V and SFX12V power supplies have an additional
power lead that provides required supplemental power for the Intel®Pentium®4
processor. Always connect the 20-pin and 4-pin leads of ATX12V and SFX12V
power supplies to the corresponding connectors on the D845HV and D845WN
boards, otherwise the board will not boot.
Do not use a standard ATX power supply. The board will not boot with a
standard ATX power supply.
For information about Refer to
Processor support Most recent D845WN
Specification Update
Processor usage Section 1.3, page 17
Power supply connectors Section 2.8.2.3, page 58

IntelDesktop Board D845HV Specification Update
14
ERRATA
1. Certain PCI Add-in Devices May Not be Recognized
PROBLEM:Some add-in PCI devices, especially those that use serial EPROM’s, may not be enumerated
during POST.
IMPLICATION:Enumeration of certain add-in PCI devices may not occur, particularly if those devices utilize a
serial EPROM.
WORKAROUND:For those devices exhibiting this erratum, place the device into PCI slot one (slot one being
the slot closest to the processor).
STATUS:This erratum was fixed in BIOS revision HV84510A.86A.0022.P05.
2. A System Hang During POST May Occur When Using a Pentium®4
Processor at a Speed of 1.6 GHz in Conjunction With a Single
SDRAM DIMM Configuration.
PROBLEM:While booting the system, some boards may experience a hang during POST code D3 when the
system is configured specifically with a Pentium®4 processor running at a speed of 1.6 GHz and with only a
single SDRAM DIMM installed.
IMPLICATION:There are two failing results to this specific configuration. One is due to false tasks on the
SMBus that halts the system during Non-SPD memory detection. The other is due to a violation of
specifications in memory initialization. After memory is initialized there exists a requirement that no reads
happen for the next 200 µsec, this requirement is violated in the original reference code located in the BIOS.
WORKAROUND:Either add a different speed Pentium 4 processor and/or add additional SDRAM DIMM’s to
the configuration.
STATUS:This erratum was fixed in BIOS revision HV84510A.86A.0029.P07.
3. System Hang During POST May Occur When Using Certain USB
Cameras
PROBLEM:During the system boot, certain USB cameras may cause a hang during POST if the camera is
on during the boot process.
IMPLICATION:Some USB cameras may cause a system hang if the camera is on during system boot due to
the BIOS incorrectly identifying the camera as a bootable device.
WORKAROUND:Ensure that the USB camera is off during the system boot process.
STATUS:This erratum was fixed in BIOS revision HV84510A.86A.0031.P08.