Intel D845PEBT2 Specification
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Intel D845PEBT2 Specification

Intel D845PEBT2 Specification

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Intel
Technical Product Specification
®
The Intel
Desktop Board D845PEBT2 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 D845PEBT2 Specification Update.
®
Desktop Board D845PEBT2
September 2002
Order Number: C15333-001

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Summary of Contents for Intel D845PEBT2

  • Page 1 Order Number: C15333-001 ® The Intel Desktop Board D845PEBT2 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 D845PEBT2 Specification Update.

  • Page 2: Revision History

    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.

  • Page 3: Intended Audience

    Preface This Technical Product Specification (TPS) specifies the Intel Desktop Board D845PEBT2 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 and its components to the vendors, system integrators, and other engineers and technicians who need this level of information.
  • Page 4 When used in the description of a component, N indicates component type, xn are the relative coordinates of its location on the Desktop Board D845PEBT2, 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.

  • Page 5: Table Of Contents

    Board Layout....................14 1.1.4 Block Diagram....................15 Online Support ......................16 Operating System Support ..................16 Design Specifications ....................17 Processor ........................20 System Memory ......................21 ® Intel 845PE 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 ®...
  • Page 6 Intel Desktop Board D845PEBT2 Technical Product Specification 2 Technical Reference Introduction.........................45 Memory Map ......................45 Fixed I/O Map......................46 DMA Channels ......................47 PCI Configuration Space Map ..................47 Interrupts ........................48 PCI Interrupt Routing Map ..................49 Connectors .........................51 2.8.1 Back Panel Connectors................52 2.8.2 Internal I/O Connectors ................56 2.8.3...
  • Page 7 Contents ® 3.10 Fast Booting Systems with Intel Rapid BIOS Boot ............94 3.10.1 Peripheral Selection and Configuration ............94 3.10.2 Intel Rapid BIOS Boot ..................95 3.11 BIOS Security Features....................96 4 BIOS Setup Program Introduction.........................97 Maintenance Menu .....................98 Main Menu........................99 Advanced Menu......................100 4.4.1...
  • Page 8 Location of the Standby Power Indicator LED ............43 Back Panel Connectors ....................52 Location of the Board’s AA Number................57 Power and Hardware Control Connectors ..............58 D845PEBT2 Add-in Board and Peripheral Interface Connectors ........61 External I/O Connectors .....................68 Front Panel Connector Pins..................70 Location of the Jumper Blocks..................72 12"...
  • Page 9 Board Dimensions ......................74 Power Usage......................79 Standby Current Requirements ..................80 Fan Connector Current Capability ................81 Thermal Considerations for Components ..............84 Desktop Board D845PEBT2 Environmental Specifications.........85 Safety Regulations .....................86 EMC Regulations......................86 Boot Device Menu Options ..................94 Supervisor and User Password Functions ..............96 BIOS Setup Program Menu Bar .................97...
  • Page 10 Intel Desktop Board D845PEBT2 Technical Product Specification Main Menu........................99 Advanced Menu......................100 PCI Configuration Submenu ..................101 Boot Configuration Submenu..................102 Peripheral Configuration Submenu................103 IDE Configuration Submenu ..................105 Primary/Secondary IDE Master/Slave Submenus.............106 Diskette Configuration Submenu ................107 Event Log Configuration Submenu ................108 Video Configuration Submenu ..................109 USB Configuration Submenu..................110...

  • Page 11: Product Description

    Online Support ......................16 Operating System Support ..................16 Design Specifications ....................17 Processor ........................20 System Memory ......................21 ® Intel 845PE Chipset ....................23 IDE RAID Controller (Optional) ...................27 Serial ATA Controller (Optional) .................27 1.10 I/O Controller ......................28 1.11 IEEE 1394a-2000 Controller (Optional) ..............29 1.12 Audio Subsystem......................30...

  • Page 12: Overview

    NOTE: The Desktop Board 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. For the latest memory information, please refer to the following Intel web site: http://developer.intel.com/design/motherbd/bt2/bt2_mem.htm ®...

  • Page 13: Manufacturing Options

    Plug and Play, and SMBIOS. 1.1.2 Manufacturing Options Table 2 describes the manufacturing options for the Desktop Board D845PEBT2. Not every manufacturing option is available in all marketing channels. Please contact your Intel representative to determine which manufacturing options are available to you.

  • Page 14: Board Layout

    Intel Desktop Board D845PEBT2 Technical Product Specification 1.1.3 Board Layout Figure 1 shows the location of the major components on the Desktop Board D845PEBT2. OM15027 Audio codec Intel 82802AB Firmware Hub (FWH) Intel 82562ET PLC device Intel 82801DB I/O Controller Hub (ICH4)

  • Page 15: Block Diagram

    Product Description 1.1.4 Block Diagram Figure 2 is a block diagram of the major functional areas of the Desktop Board D845PEBT2. See Figure 4 on page 24 for USB port routing. = connector or socket Back Panel/ Front Panel USB Ports...

  • Page 16: Online Support

    Custom splash screens http://www.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 1.3 Operating System Support The Desktop Board D845PEBT2 support drivers for onboard hardware and subsystems under the following operating systems: • † Microsoft Windows • Windows 2000 •...

  • Page 17: Design Specifications

    Product Description 1.4 Design Specifications Table 3 lists the specifications applicable to the Desktop Board D845PEBT2. Table 3. Specifications Reference Specification Version, Revision Date, The information is Name Title and Ownership available from… 1394 IEEE Std 1394-1995, November 8, 2001 http://standards.ieee.org/...
  • Page 18 Intel Desktop Board D845PEBT2 Technical Product Specification Table 3. Specifications (continued) Reference Specification Version, Revision Date and The information is Name Title Ownership available from… Double Data Rate (DDR) Version 2.0, http://www.jedec.org/ SDRAM Specification SDRAM May 2002, JEDEC Solid State Technology Association.
  • Page 19 The information is Name Title and Ownership available from… Preboot Execution Version 2.1, ftp://download.intel.com/ Environment September 20, 1999, labs/manage/wfm/ Intel Corporation. download/pxespec.pdf SATA Serial ATA: High Speed Revision 1.0, http://www.serialata.com/ Serialized AT August 29, 2001, Attachment APT Technologies, Inc., Dell Computer Corporation,...

  • Page 20: Processor

    ✏ NOTE Do not use a standard ATX power supply. The Desktop Board D845PEBT2 will not boot with a standard ATX power supply. Use only ATX12V-compliant power supplies with the Desktop Board D845PEBT2. ATX12V power supplies have an additional power lead that provides required supplemental power for the processor.

  • Page 21: System Memory

    The Desktop Board 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.

  • Page 22: Supported Memory Configurations

    Intel Desktop Board D845PEBT2 Technical Product Specification Table 4 lists the supported DIMM configurations. Table 4. Supported Memory Configurations DIMM DDR SDRAM DDR SDRAM Organization Number of DDR Capacity Configuration Density Front-side/Back-side SDRAM Devices 64 MB 64 Mbit 8 M x 8/empty...

  • Page 23: Intel 845Pe Chipset

    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 D845PEBT2’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.

  • Page 24: Agp

    Section 1.4, page 17 1.7.2 USB The Desktop Board D845PEBT2 supports up to six USB 2.0 ports, fully supports UHCI and EHCI, and uses UHCI- and EHCI-compatible drivers. The ICH4 provides the USB controller for all ports, as shown in Figure 4. The port arrangement is as follows: •...

  • Page 25: Ide Support

    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 D845PEBT2 supports Laser Servo (LS-120) diskette technology through the IDE interfaces. The BIOS supports booting from an LS-120 drive.

  • Page 26: Real-Time Clock, Cmos Sram, And Battery

    Intel Desktop Board D845PEBT2 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...

  • Page 27: Ide Raid Controller (Optional)

    Refer to The location of the SATA/SATA RAID connectors Figure 14, page 61 The signal names of the SATA/SATA RAID connectors Table 43, page 67 The BIOS Setup program’s Boot menu Table 83, page 115 SATA RAID configuration http://developer.intel.com/design/ motherbd/bt2/index.htm...

  • Page 28: I/O Controller

    SMSC LPC47M172 I/O controller http://www.smsc.com 1.10.1 Serial Ports The Desktop Board D845PEBT2 has one serial port connector located on the back panel. The serial port supports data transfers at speeds up to 115.2 kbits/sec with BIOS support. For information about...

  • Page 29: Keyboard And Mouse Interface

    • Peripheral hot swapping • Plug and play The Desktop Board D845PEBT2 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.

  • Page 30: Audio Subsystem

    Intel Desktop Board D845PEBT2 Technical Product Specification 1.12 Audio Subsystem The Desktop Board D845PEBT2 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 AD1981B codec (described on...

  • Page 31: 2-Channel Audio Subsystem (Optional)

    Section 2.8.1, page 52 1.12.2 2-Channel Audio Subsystem (Optional) The audio subsystem includes the following: • Intel 82801DB I/O Controller Hub (ICH4) • Analog Devices AD1981B audio codec • Microphone input that supports a single dynamic, condenser, or electret microphone The subsystem has the following connectors: •...

  • Page 32: Audio Connectors

    Figure 14, page 61 The signal names of the ATAPI-style CD-ROM connector Table 39, page 65 1.12.4 Audio Subsystem Software Audio software and drivers are available from Intel’s World Wide Web site. For information about Refer to Obtaining audio software and drivers...

  • Page 33: Lan Subsystem

     Supports LAN wake capabilities 1.13.1 Intel ® 82562ET Physical Layer Interface Device The Intel 82562ET component provides an interface to the back panel RJ-45 connector with integrated LEDs. The Intel 82562ET provides the following functions: • Basic 10/100 Ethernet LAN connectivity •...

  • Page 34: Lan Subsystem Software

    The CNR connector includes power signals required for power management and for CNR card operation. ✏ NOTE The Desktop Board D845PEBT2 does not support USB and LAN functionality on CNR cards. Figure 8 shows the signal interface between the ICH4 and the CNR. AC ’97 Interface Communication and...

  • Page 35: Hardware Management Subsystem

    Refer to CNR audio upgrade cards http://developer.intel.com/technology/cnr/ 1.15 Hardware Management Subsystem The hardware management features enable the Desktop Board D845PEBT2 to be compatible with the Wired for Management (WfM) specification. The Desktop Board D845PEBT2 has the following hardware management features: •...

  • Page 36: Fan Monitoring

    Intel Desktop Board D845PEBT2 Technical Product Specification 1.15.1.2 Thermal Monitoring Figure 9 shows the location of the sensors and fan connectors. OM15032 Thermal diode, located on processor die Remote ambient temperature sensor Ambient temperature sensor, internal to hardware monitoring ASIC...

  • Page 37: Chassis Intrusion And Detection

    Product Description 1.15.3 Chassis Intrusion and Detection The boards support a chassis security feature that detects if the chassis cover has been removed. The security feature uses a mechanical switch on the chassis that attaches to the chassis intrusion connector. When the chassis cover is removed, the mechanical switch is in the closed position. For information about Refer to The location of the chassis intrusion connector...

  • Page 38: Acpi

    ACPI gives the operating system direct control over the power management and Plug and Play functions of a computer. The use of ACPI with the Desktop Board D845PEBT2 requires an operating system that provides full ACPI support. ACPI features include: •...

  • Page 39: Power States And Targeted System Power

    The operating system uses information from applications and user settings to put the system as a whole into a low-power state. Table 7 lists the power states supported by the Desktop Board D845PEBT2 along with the associated system power targets. See the ACPI specification for a complete description of the various system and power states.

  • Page 40: Hardware Support

    The total amount of standby current required depends on the wake devices supported and manufacturing options. Refer to Section 2.11.3 on page 80 for additional information. The Desktop Board D845PEBT2 provides power management hardware features, including: • Power connector •...

  • Page 41: Fan Connector Function/Operation

    Product Description Resume on Ring enables telephony devices to access the computer when it is in a power-managed state. The method used depends on the type of telephony device (external or internal). ✏ NOTE The use of Resume on Ring and Wake from USB technologies from an ACPI state requires an operating system that provides full ACPI support.
  • Page 42 Instantly Available PC technology can damage the power supply. Refer to Section 2.11.3 on page 80 for additional information. Instantly Available PC technology enables the Desktop Board D845PEBT2 to enter the ACPI S3 (Suspend-to-RAM) sleep-state. While in the S3 sleep-state, the computer will appear to be off (the power supply is off, and the front panel LED is amber if dual colored, or off if single colored.)

  • Page 43: Location Of The Standby Power Indicator Led

    Desktop Board D845PEBT2. Failure to do so could damage the Desktop Board D845PEBT2 and any attached devices. The standby power indicator LED shows that power is still present even when the computer appears to be off.
  • Page 44 Intel Desktop Board D845PEBT2 Technical Product Specification 1.16.2.8 Wake from PS/2 Devices PS/2 device activity wakes the computer from an ACPI S1 or S3 state. 1.16.2.9 PME# Wake-up Support When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI S1, S3, S4,...

  • Page 45: Technical Reference

    2 Technical Reference What This Chapter Contains Introduction.........................45 Memory Map ......................45 Fixed I/O Map......................46 DMA Channels ......................47 PCI Configuration Space Map ..................47 Interrupts ........................48 PCI Interrupt Routing Map ..................49 Connectors .........................51 Jumper Blocks......................72 2.10 Mechanical Considerations..................74 2.11 Electrical Considerations ....................79 2.12 Thermal Considerations....................83 2.13 Reliability ........................85 2.14 Environmental ......................85...

  • Page 46: Fixed I/O Map

    I/O Map Address (hex) Size Description 0000 - 00FF 256 bytes Used by the Desktop Board D845PEBT2. Refer to the ICH4 data sheet for dynamic addressing information 0170 - 0177 8 bytes Secondary IDE channel 01F0 - 01F7 8 bytes...

  • Page 47: Dma Channels

    PCI Configuration Space Map Device Function Number (hex) Number (hex) Number (hex) Description Memory controller of Intel 82845PE component Host to AGP bridge (virtual P2P) Hub link to PCI bridge Intel 82801DB ICH4 PCI-to-LPC bridge IDE controller SMBus controller AC ’97 audio controller AC ’97 modem controller (optional)

  • Page 48: Interrupts

    Intel Desktop Board D845PEBT2 Technical Product Specification 2.6 Interrupts The interrupts can be routed through either the Programmable Interrupt Controller (PIC) or the Advanced Programmable Interrupt Controller (APIC) portion of the ICH4 component. The PIC is supported in Windows 98 SE and Windows ME, and uses the first 16 interrupts. The APIC is supported in Windows 2000 and Windows XP, and supports a total of 24 interrupts.

  • Page 49: Pci Interrupt Routing Map

    PCI add-in card connect to one of these PIRQ signals. Some PCI interrupt sources are electrically tied together on the Desktop Board D845PEBT2 and therefore share the same interrupt. Table 15 shows an example of how the PIRQ signals are routed.

  • Page 50: Pci Interrupt Routing Map

    Intel Desktop Board D845PEBT2 Technical Product Specification Table 15. PCI Interrupt Routing Map ICH4 PIRQ Signal Name PCI Interrupt Source PIRQA PIRQB PIRQC PIRQD PIRQE PIRQF PIRQG PIRQH AGP connector INTA INTB ICH4 USB UHCI controller 1 INTA SMBus controller...

  • Page 51: Connectors

    • Front panel USB and IEEE 1394a-2000 The other internal connectors of the Desktop Board D845PEBT2 are not overcurrent protected and should connect only to devices inside the computer’s chassis, such as fans and internal peripherals. Do not use these connectors to power devices external to the computer’s chassis. A fault in the load presented by the external devices could cause damage to the computer, the interconnecting cable, and the external devices themselves.

  • Page 52: Back Panel Connectors

    Intel Desktop Board D845PEBT2 Technical Product Specification 2.8.1 Back Panel Connectors Figure 11 shows the location of the back panel connectors. The back panel connectors are color-coded in compliance with PC 99 recommendations. The figure legend below lists the colors used.

  • Page 53: Ps/2 Mouse/Keyboard Connector

    Technical Reference Table 16. PS/2 Mouse/Keyboard Connector Signal Name Data Not connected Ground +5 V (Fused) Clock Not connected Table 17. IEEE 1394a-2000 Connector (Optional) Signal Name +12V (Fused) Ground TPB1- TPB1+ TPA1- TPA1+ 7 - 14 Shield Ground Table 18. USB Connectors Signal Name +5 V (Fused)

  • Page 54: Parallel Port Connector

    Intel Desktop Board D845PEBT2 Technical Product Specification Table 20. Parallel Port Connector Standard Signal Name ECP Signal Name EPP Signal Name STROBE# STROBE# WRITE# ACK# ACK# INTR BUSY BUSY#, PERIPHACK WAIT# PERROR PE, ACKREVERSE# SELECT SELECT SELECT AUDOFD# AUDOFD#, HOSTACK...

  • Page 55: Audio Line In Connector

    Technical Reference Table 25. Audio Line In Connector Signal Name Audio left in Ring Audio right in Sleeve Ground Table 26. Audio Line Out Connector (Front Left and Right Out for 6-Channel Audio) Signal Name Audio left out Ring Audio right out Sleeve Ground Table 27.

  • Page 56: Internal I/O Connectors

    Intel Desktop Board D845PEBT2 Technical Product Specification 2.8.2 Internal I/O Connectors The internal I/O connectors are divided into the following functional groups: • Power and hardware control (see page 58):  Fans [three]  ATX12V  Main power  Chassis intrusion •...

  • Page 57: Location Of The Board's Aa Number

    This document references back-panel slot numbering with respect to processor location on the Desktop Board D845PEBT2. The AGP slot is not numbered. PCI slots are identified as PCI slot #x, starting with the slot closest to the processor. The ATX specification identifies expansion slot locations with respect to the far edge of a full-sized ATX chassis.

  • Page 58: Power And Hardware Control Connectors

    Intel Desktop Board D845PEBT2 Technical Product Specification 2.8.2.2 Power and Hardware Control Connectors CAUTION The processor fan must be connected to the processor fan connector, not to a chassis fan connector. Connecting the processor fan to a chassis fan connector may result in onboard component damage that will halt fan operation.

  • Page 59: Atx12V Power Connector

    ✏ NOTE Do not use a standard ATX power supply. The Desktop Board D845PEBT2 will not boot with a standard ATX power supply. Use only ATX12V-compliant power supplies with the Desktop Board D845PEBT2. ATX12V power supplies have an additional power lead that provides required supplemental power for the Intel Pentium 4 processor.

  • Page 60: Main Power Connector

    Intel Desktop Board D845PEBT2 Technical Product Specification Table 33. Main Power Connector Signal Name Signal Name +3.3 V +3.3 V +3.3 V -12 V Ground Ground +5 V PS-ON# (power supply remote on/off) Ground Ground +5 V Ground Ground Ground...

  • Page 61: D845Pebt2 Add-In Board And Peripheral Interface Connectors

    The SMBus is routed to PCI bus connector 1 or 2 depending on the board’s AA number labeled on the board’s front right corner (see section 2.8.2.1 on page 57). This enables PCI bus add-in boards with SMBus support to access sensor data on the Desktop Board D845PEBT2. The specific SMBus signals are as follows: ...

  • Page 62: Cnr Connector (Optional)

    Intel Desktop Board D845PEBT2 Technical Product Specification Table 36. CNR Connector (Optional) Signal Name Signal Name Reserved Reserved Reserved Reserved Ground Reserved Reserved Ground Reserved Reserved Ground Reserved Not connected Ground Not connected Not connected Ground Not connected Not connected...

  • Page 63: Pci Bus Connectors

    Technical Reference Table 37. PCI Bus Connectors Signal Name Signal Name Signal Name Signal Name Ground (TRST#)* -12 V AD16 AD17 +12 V Ground (TCK)* +3.3 V C/BE2# +5 V (TMS)* Ground FRAME# Ground +5 V (TDI)* Not connected (TDO)* Ground IRDY# +5 V...

  • Page 64: Agp Connector

    Intel Desktop Board D845PEBT2 Technical Product Specification Table 38. AGP Connector Signal Name Signal Name Signal Name Signal Name +12 V Not connected A34 Vddq Vddq TYPEDET# +5 V AD22 AD21 Reserved +5 V AD20 AD19 Not connected Not connected A37...

  • Page 65: Atapi-Style Cd-Rom Connector

    Technical Reference Table 39. ATAPI-Style CD-ROM Connector Signal Name Left audio input from CD-ROM CD audio differential ground CD audio differential ground Right audio input from CD-ROM Table 40. Diskette Drive Connector Signal Name Signal Name Ground DENSEL Not connected DRVDEN1 Ground FDINDX#...

  • Page 66: Pci Ide Connectors

    Intel Desktop Board D845PEBT2 Technical Product Specification Table 41. PCI IDE Connectors Signal Name Signal Name Reset IDE Ground Data 7 Data 8 Data 6 Data 9 Data 5 Data 10 Data 4 Data 11 Data 3 Data 12 Data 2...

  • Page 67: Ide Raid Connectors (Optional)

    Technical Reference Table 43. IDE RAID Connectors (Optional) Signal Name Signal Name Reset IDE Ground Data 7 Data 8 Data 6 Data 9 Data 5 Data 10 Data 4 Data 11 Data 3 Data 12 Data 2 Data 13 Data 1 Data 14 Data 0 Data 15...

  • Page 68: External I/O Connectors

    Intel Desktop Board D845PEBT2 Technical Product Specification 2.8.3 External I/O Connectors Figure 15 shows the locations of the external I/O connectors. OM15035 Item Description For more information see: Front panel audio Table 45 Auxiliary front panel power/sleep/message-waiting LED Table 51...

  • Page 69: Front Panel Audio Connector

    Technical Reference Table 45. Front Panel Audio Connector Signal Name Signal Name MIC_IN_FP Ground MIC_BIAS V_5P0_AUD_ANALOG R_FNTOUT R_RETIN Not connected L_FNT_OUT L_RETIN ✏ NOTE The front panel audio connector is alternately used as a jumper block for routing audio signals. For more information, see Section 2.9.1 on page 72.

  • Page 70: Front Panel Connector Pins

    Intel Desktop Board D845PEBT2 Technical Product Specification 2.8.3.1 Front Panel Connector This section describes the functions of the front panel connector. Table 48 lists the signal names of the front panel connector. Table 48. Front Panel Connector Signal In/Out Description...

  • Page 71: States For A One-Color Power Led

    2.8.3.1.2 Reset Switch Connector Pins 5 and 7 can be connected to a momentary single pole, single throw (SPST) type switch that is normally open. When the switch is closed, the Desktop Board D845PEBT2 resets and runs the POST. 2.8.3.1.3 Power/Sleep/Message Waiting LED Connector Pins 2 and 4 can be connected to a one- or two-color LED.

  • Page 72: Jumper Blocks

    Do not move any jumpers with the power on. Always turn off the power and unplug the power cord from the computer before changing a jumper setting. Otherwise, the Desktop Board D845PEBT2 could be damaged. Figure 17 shows the location of the jumper blocks on the Desktop Board D845PEBT2. OM14846 Item...

  • Page 73: Bios Setup Configuration Jumper Block

    Technical Reference Table 52 describes the two configurations of this connector/jumper block. Table 52. Front Panel Audio Connector or Jumper Block Jumper Setting Configuration Front out signals if 6-channel audio (line out signals if 2-channel audio) are routed to the back panel line out connector. The back panel audio line out connector is shown in Figure 11 on page 52.

  • Page 74: Mechanical Considerations

    2.10 Mechanical Considerations 2.10.1 D845PEBT2 Form Factor The Desktop Board D845PEBT2 is designed to fit into an ATX-form-factor chassis. The board dimensions depend on the board version, as shown in the table below. The location of the board’s AA number is shown in the Figure 12 on page 57.

  • Page 75: X 8.5" Desktop Board Dimensions

    Technical Reference 6.50 [165.10] 6.10 [154.94] 5.20 [132.08] 0.00 2.00 [50.80] 6.45 0.00 5.55 [163.83] [140.97] 4.90 2.60 6.20 [124.46] [66.04] [157.48] 1.80 [45.72] OM15077 Figure 19. 12" x 8.5" Desktop Board Dimensions...

  • Page 76: I/O Shield

    Intel Desktop Board D845PEBT2 Technical Product Specification 2.10.2 I/O Shield The back panel I/O shield for Desktop Board D845PEBT2 must meet specific dimension and material requirements. Systems based on the Desktop Board D845PEBT2 need the back panel I/O shield to pass certification testing. The following figures show the critical dimensions of the three types of I/O shields for the Desktop Board D845PEBT2: •...

  • Page 77: I/O Shield Dimensions For Boards With A 6-Channel Audio Subsystem And Without Ieee 1394A-2000 Connector

    Technical Reference 162.30 Ref [6.390] 1.60±0.13 [0.063±0.005] 20.00±0.13 TYP [ 0.79±0.00] 1.00 [0.04] 8X R0.5 MIN 22.45 [0.88] 13.19 [0.519] 7.01 0.69 [0.28] 48.00 [0.027] 0.00 11.81 [1.89] 11.81 [0.47] [0.47] 12.31 12.04 [0.485] [0.474] 12.81 14.40 [0.504] [0.567] 14.40 [0.567] Pictorial View...

  • Page 78: I/O Shield Dimensions For Boards With A 2-Channel Audio Subsystem

    Intel Desktop Board D845PEBT2 Technical Product Specification 162.300 Ref [6.390] 1.60±0.13 [0.063±0.005] 20.00±0.13 TYP [ 0.79±0.00] 1.00 [0.04] 8X R0.5 MIN 22.45 [0.88] 13.19 [0.519] 7.01 0.69 [0.28] 48.00 [0.027] 0.00 11.81 [1.89] [0.47] 11.81 [0.47] 14.40 [0.567] 14.40 [0.567]...

  • Page 79: Electrical Considerations

    298.2 mA 2.11.2 Add-in Board Considerations The Desktop Board D845PEBT2 is designed to provide 2 A (average) of +5 V current for each add-in board. The total +5 V current draw for add-in boards for a fully loaded Desktop Board...

  • Page 80: Standby Current Requirements

    Calculate the standby current requirements using the steps described below. Power supplies used with the Desktop Board D845PEBT2 must be able to provide enough standby current to support the Instantly Available PC (ACPI S3 sleep state) configuration as outlined in Table 56 below.

  • Page 81: Fan Connector Current Capability

    Connecting the processor fan to a chassis fan connector may result in onboard component damage that will halt fan operation. Table 57 lists the current capability of the fan connectors on the Desktop Board D845PEBT2. Table 57. Fan Connector Current Capability...

  • Page 82: Power Supply Considerations

    System integrators should refer to the power usage values listed in Table 55 when selecting a power supply for use with the Desktop Board D845PEBT2. Measurements account only for current sourced by the Desktop Board D845PEBT2 while running in idle modes of the started operating systems.

  • Page 83: Thermal Considerations

    Technical Reference 2.12 Thermal Considerations CAUTION The use of an Intel Pentium 4 processor operating above 2.80 GHz with this Intel desktop board requires the following: • A chassis with appropriate airflow to ensure proper cooling of the components on the board •...

  • Page 84: Localized High Temperature Zones

    Figure 23. Localized High Temperature Zones Table 58 provides maximum case temperatures for components on the Desktop Board D845PEBT2 that are sensitive to thermal changes. The operating temperature, current load, or operating frequency could affect case temperatures. Maximum case temperatures are important when considering proper airflow to cool the Desktop Board D845PEBT2.

  • Page 85: Reliability

    The MTBF data is calculated from predicted data at 55 ºC. The MTBF calculation for the Desktop Board D845PEBT2 is 121,776.5741 hours. 2.14 Environmental Table 59 lists the environmental specifications for the Desktop Board D845PEBT2. Table 59. Desktop Board D845PEBT2 Environmental Specifications...

  • Page 86: Regulatory Compliance

    This section describes the Desktop Board D845PEBT2’s compliance with U.S. and international safety and electromagnetic compatibility (EMC) regulations. 2.15.1 Safety Regulations Table 60 lists the safety regulations the Desktop Board D845PEBT2 complies with when correctly installed in a compatible host system. Table 60.

  • Page 87: Product Certification Markings (Board Level)

    Intel Desktop Boards: E210882 (component side). • FCC Declaration of Conformity logo mark for Class B equipment; to include Intel name and D845PEBT2 model designation (solder side). • CE mark: Declaring compliance to European Union (EU) EMC directive (89/336/EEC) and Low Voltage directive (73/23/EEC) (component side).
  • Page 88 Intel Desktop Board D845PEBT2 Technical Product Specification...

  • Page 89: Overview Of Bios Features

    3.11 BIOS Security Features....................96 3.1 Introduction The Desktop Board uses an Intel/AMI BIOS that is stored in the Firmware Hub (FWH) and can be updated using a disk-based program. The FWH contains the BIOS Setup program, POST, the PCI auto-configuration utility, and Plug and Play support.

  • Page 90: Bios Flash Memory Organization

    Using this support, an SMBIOS service-level application running on a non-Plug and Play operating system can obtain the SMBIOS information. For information about Refer to The compliance level of the Desktop Board D845PEBT2 with SMBIOS Section 1.4, page 17...

  • Page 91: Legacy Usb Support

    To install an operating system that supports USB, verify that Legacy USB support in the BIOS Setup program is set to Enabled and follow the operating system’s installation instructions. 3.6 BIOS Updates The BIOS can be updated using either of the following utilities, which are available on the Intel World Wide Web site: •...

  • Page 92: Language Support

    This splash screen can be replaced with a custom splash screen. A utility is available from Intel to assist with creating a custom splash screen. The custom splash screen can be programmed into the flash memory using the BIOS upgrade utility.

  • Page 93: Boot Options

    Section 2.9.1, page 72 The Boot menu in the BIOS Setup program Section 4.3, page 99 Contacting Intel customer support Section 1.2, page 16 3.8 Boot Options In the BIOS Setup program, the user can choose to boot from a diskette drive, hard drives, CD-ROM, or the network.

  • Page 94: Changing The Default Boot Device During Post

    Intel Desktop Board D845PEBT2 Technical Product Specification 3.9 Changing the Default Boot Device During POST Pressing the <F10> key during POST causes a boot device menu to be displayed. To use this key during POST, the User Access Level in the BIOS Setup program’s Security menu must be set to Full.

  • Page 95: Intel Rapid Bios Boot

    It is possible to optimize the boot process to the point where the system boots so quickly that the Intel logo screen (or a custom logo splash screen) will not be seen. Monitors and hard disk drives with minimum initialization times can also contribute to a boot time that might be so fast that necessary logo screens and POST messages cannot be seen.

  • Page 96: Bios Security Features

    Intel Desktop Board D845PEBT2 Technical Product Specification 3.11 BIOS Security Features The BIOS includes security features that restrict access to the BIOS Setup program and who can boot the computer. A supervisor password and a user password can be set for the BIOS Setup program and for booting the computer, with the following restrictions: •...

  • Page 97: Bios Setup Program

    4 BIOS Setup Program What This Chapter Contains Introduction.........................97 Maintenance Menu .....................98 Main Menu........................99 Advanced Menu......................100 Security Menu ......................113 Power Menu ......................114 Boot Menu ........................115 Exit Menu .........................118 4.1 Introduction The BIOS Setup program can be used to view and change the BIOS settings for the computer. The BIOS Setup program is accessed by pressing the <F2>...

  • Page 98: Maintenance Menu

    Intel Desktop Board D845PEBT2 Technical Product Specification Table 65 lists the function keys available for menu screens. Table 65. BIOS Setup Program Function Keys BIOS Setup Program Function Key Description <←> or <→> Selects a different menu screen (Moves the cursor left or right) <↑>...

  • Page 99: Main Menu

    BIOS Setup Program 4.3 Main Menu To access this menu, select Main on the menu bar at the top of the screen. Maintenance Advanced Security Power Boot Exit Main Table 67 describes the Main menu. This menu reports processor and memory information and is for configuring the system date and system time.

  • Page 100: Advanced Menu

    Intel Desktop Board D845PEBT2 Technical Product Specification 4.4 Advanced Menu To access this menu, select Advanced on the menu bar at the top of the screen. Maintenance Main Security Power Boot Exit Advanced PCI Configuration Boot Configuration Peripheral Configuration IDE Configuration...

  • Page 101: Pci Configuration Submenu

    BIOS Setup Program 4.4.1 PCI Configuration Submenu To access this submenu, select Advanced on the menu bar and then PCI Configuration. Maintenance Main Security Power Boot Exit Advanced PCI Configuration Boot Configuration Peripheral Configuration IDE Configuration Diskette Configuration Event Log Configuration Video Configuration USB Configuration Chipset Configuration...

  • Page 102: Boot Configuration Submenu

    Intel Desktop Board D845PEBT2 Technical Product Specification Table 69. PCI Configuration Submenu (continued) Feature Options Description • Auto (default) PCI Slot5 IRQ Priority Allows selection of IRQ priority for PCI bus connector 5. • 3 (Note) • 5 • 9 •...

  • Page 103: Peripheral Configuration Submenu

    BIOS Setup Program 4.4.3 Peripheral Configuration Submenu To access this submenu, select Advanced on the menu bar and then Peripheral Configuration. Maintenance Main Security Power Boot Exit Advanced PCI Configuration Boot Configuration Peripheral Configuration IDE Configuration Diskette Configuration Event Log Configuration Video Configuration USB Configuration Chipset Configuration...
  • Page 104 Intel Desktop Board D845PEBT2 Technical Product Specification Table 71. Peripheral Configuration Submenu (continued) Feature Options Description • Disabled Parallel port Configures the parallel port. • Enabled Auto assigns LPT1 the address 378h and the interrupt IRQ7. • Auto (default) An * (asterisk) displayed next to an address indicates a conflict with another device.

  • Page 105: Ide Configuration Submenu

    BIOS Setup Program 4.4.4 IDE Configuration Submenu To access this submenu, select Advanced on the menu bar and then IDE Configuration. Maintenance Main Security Power Boot Exit Advanced PCI Configuration Boot Configuration Peripheral Configuration IDE Configuration Diskette Configuration Event Log Configuration Video Configuration USB Configuration Chipset Configuration...

  • Page 106: Primary/Secondary Ide Master/Slave Submenus

    Intel Desktop Board D845PEBT2 Technical Product Specification 4.4.4.1 Primary/Secondary IDE Master/Slave Submenus To access these submenus, select Advanced on the menu bar, then IDE Configuration, and then the master or slave to be configured. Maintenance Main Security Power Boot Exit...

  • Page 107: Diskette Configuration Submenu

    BIOS Setup Program 4.4.5 Diskette Configuration Submenu To access this menu, select Advanced on the menu bar and then Diskette Configuration. Maintenance Main Security Power Boot Exit Advanced PCI Configuration Boot Configuration Peripheral Configuration IDE Configuration Diskette Configuration Event Log Configuration Video Configuration USB Configuration Chipset Configuration...

  • Page 108: Event Log Configuration Submenu

    Intel Desktop Board D845PEBT2 Technical Product Specification 4.4.6 Event Log Configuration Submenu To access this menu, select Advanced on the menu bar and then Event Log Configuration. Maintenance Main Security Power Boot Exit Advanced PCI Configuration Boot Configuration Peripheral Configuration...

  • Page 109: Video Configuration Submenu

    BIOS Setup Program 4.4.7 Video Configuration Submenu To access this menu, select Advanced on the menu bar and then Video Configuration. Maintenance Main Security Power Boot Exit Advanced PCI Configuration Boot Configuration Peripheral Configuration IDE Configuration Diskette Configuration Event Log Configuration Video Configuration USB Configuration Chipset Configuration...

  • Page 110: Usb Configuration Submenu

    Intel Desktop Board D845PEBT2 Technical Product Specification 4.4.8 USB Configuration Submenu To access this menu, select Advanced on the menu bar and then USB Configuration. Maintenance Main Security Power Boot Exit Advanced PCI Configuration Boot Configuration Peripheral Configuration IDE Configuration...

  • Page 111: Chipset Configuration Submenu

    BIOS Setup Program 4.4.9 Chipset Configuration Submenu To access this menu, select Advanced on the menu bar and then Chipset Configuration. Maintenance Main Security Power Boot Exit Advanced PCI Configuration Boot Configuration Peripheral Configuration IDE Configuration Diskette Configuration Event Log Configuration Video Configuration USB Configuration Chipset Configuration...

  • Page 112: Fan Control Configuration Submenu

    Intel Desktop Board D845PEBT2 Technical Product Specification Table 78. Chipset Configuration Submenu (continued) Feature Options Description • 8 SDRAM RAS Active to Corresponds to tRAS. (Note) Precharge • 7 • 6 • 5 (default) • 2.0 (default) SDRAM CAS# Latency Selects the number of clock cycles required to address a column in memory.

  • Page 113: Security Menu

    BIOS Setup Program 4.5 Security Menu To access this menu, select Security from the menu bar at the top of the screen. Maintenance Main Advanced Power Boot Exit Security The menu represented by Table 80 is for setting passwords and security features. Table 80.

  • Page 114: Power Menu

    Intel Desktop Board D845PEBT2 Technical Product Specification 4.6 Power Menu To access this menu, select Power from the menu bar at the top of the screen. Maintenance Main Advanced Security Boot Exit Power ACPI The menu represented in Table 81 is for setting the power management features.

  • Page 115: Boot Menu

    Disables/enables PXE boot from LAN. (default) Note: When set to Enabled, you must reboot for the • Enabled Intel Boot Agent device to be available in the Boot Device menu. • Disabled USB Boot Disables/enables booting from USB boot devices.

  • Page 116: Boot Device Priority Submenu

    • Intel Boot Agent Notes: 1. This option is only available when PXE Boot to LAN is set to Enabled in the Boot menu. 2. The boot device identifier for Intel Boot Agent (IBA) may vary depending on the BIOS release.

  • Page 117: Hard Disk Drives Submenu

    BIOS Setup Program 4.7.2 Hard Disk Drives Submenu To access this menu, select Boot on the menu bar and then Hard Disk Drives. Maintenance Main Advanced Security Power Exit Boot Boot Device Priority Hard Disk Drives Removable Devices ATAPI CD-ROM Drives The submenu represented in Table 85 is for setting hard disk drive priority.

  • Page 118: Atapi Cd-Rom Drives Submenu

    Intel Desktop Board D845PEBT2 Technical Product Specification 4.7.4 ATAPI CD-ROM Drives Submenu To access this menu, select Boot on the menu bar and then ATAPI CD-ROM Drives. Maintenance Main Advanced Security Power Exit Boot Boot Device Priority Hard Disk Drives...

  • Page 119: Error Messages And Beep Codes

    5 Error Messages and Beep Codes What This Chapter Contains BIOS Error Messages....................119 Port 80h POST Codes....................121 Bus Initialization Checkpoints ...................125 Speaker ........................126 BIOS Beep Codes ....................126 5.1 BIOS Error Messages Table 89 lists the error messages and provides a brief description of each. Table 89.
  • Page 120 Intel Desktop Board D845PEBT2 Technical Product Specification Table 89. BIOS Error Messages (continued) Error Message Explanation Checking NVRAM..NVRAM is being checked to see if it is valid. Update OK! NVRAM was invalid and has been updated. Updated Failed NVRAM was invalid but was unable to be updated.

  • Page 121: Port 80H Post Codes

    F000:0000 in Shadow RAM and give control to recovery code in F000 Shadow RAM. Initialize interrupt vector tables, initialize system timer, initialize DMA controller and interrupt controller. Initialize extra (Intel Recovery) Module. Initialize floppy drive. Try to boot from floppy. If reading of boot sector is successful, give control to boot sector code.

  • Page 122: Runtime Code Uncompressed In F000 Shadow Ram

    Intel Desktop Board D845PEBT2 Technical Product Specification Table 92. Runtime Code Uncompressed in F000 Shadow RAM Code Description of POST Operation NMI is Disabled. To check soft reset/power-on. BIOS stack set. Going to disable cache if any. POST code to be uncompressed.
  • Page 123 Error Messages and Beep Codes Table 92. Runtime Code Uncompressed in F000 Shadow RAM (continued) Code Description of POST Operation To prepare the descriptor tables. To enter in virtual mode for memory test. To enable interrupts for diagnostics mode. To initialize data to check memory wrap around at 0:0. Data initialized.
  • Page 124 Intel Desktop Board D845PEBT2 Technical Product Specification Table 92. Runtime Code Uncompressed in F000 Shadow RAM (continued) Code Description of POST Operation Lock-key checking over. To check for memory size mismatch with CMOS. Memory size check done. To display soft error and check for password or bypass setup.

  • Page 125: Bus Initialization Checkpoints

    Error Messages and Beep Codes Table 92. Runtime Code Uncompressed in F000 Shadow RAM (continued) Code Description of POST Operation Uncompress SMBIOS module and init SMBIOS code and form the runtime SMBIOS image in shadow. Going to copy any code to specific area. Copying of code to specific area done.

  • Page 126: Speaker

    Intel Desktop Board D845PEBT2 Technical Product Specification Table 95 describes the lower nibble of the high byte and indicates the bus on which the routines are being executed. Table 95. Lower Nibble High Byte Functions Value Description Generic DIM (Device Initialization Manager)

  • Page 127: Beep Codes

    Error Messages and Beep Codes If POST completes normally, the BIOS issues one short beep before passing control to the operating system. Table 96. Beep Codes Beep Description Refresh failure Parity cannot be reset First 64 KB memory failure Timer not operational Not used 8042 GateA20 cannot be toggled Exception interrupt error...
  • Page 128 Intel Desktop Board D845PEBT2 Technical Product Specification...

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