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| Intel® Desktop Board D845EBT |
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Contents
Connectors
Caution: On the Intel® Desktop Board D845EBT, only the following connectors have overcurrent protection:
- Back panel USB, IEEE 1394a-2000, and PS/2
- Front panel USB and IEEE 1394a-2000
The other internal connectors of the Intel Desktop Board D845EBT 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.
This section describes the Desktop Board's connectors. The connectors can be divided into the following groups:
Back Panel Connectors
The figure below 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.
![[D845EBT Back Panel Connectors]](/support/motherboards/desktop/d845ebt/img/bt_bpan.gif)
| Item | Description | Color | | A | PS/2 mouse port | Green | | B | PS/2 keyboard port | Purple | | C | IEEE 1394a-2000 port | Black | | D | USB ports | Black | | E | Serial port A | Teal | | F | Parallel port | Burgundy | | G | S/PDIF (optional) | Orange | | H | Audio rear left/right out (for 6-channel audio only) | Black | | I | Audio center/LFE out (for 6-channel audio only) | Black | | J | Audio line in | Light blue | | K | Audio line out (for 2-channel audio);
Front left/right out (for 6-channel audio) | Lime green | | L | Mic in | Pink | | M | LAN | Black | | N | USB ports | Black |
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Note: The back panel audio line out connector is designed for headphones or amplified speakers only. Poor audio quality occurs if passive (non-amplified) speakers are connected to this output.
Internal I/O Connectors
The internal I/O connectors are divided into the following functional groups:
Note: This document references back-panel slot numbering with respect to processor location on the Intel Desktop Board D845EBT. 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. The ATX specification and the Intel Desktop Board D845EBT's silkscreen are opposite and could cause confusion. The ATX numbering convention is made without respect to slot type (PCI vs. AGP), but refers to an actual slot location on a chassis. The add-in board and peripheral interfaces figure illustrates the Intel Desktop Board D845EBT's PCI slot numbering.
Power and Hardware Control Connectors
The figure below shows the location of the power and hardware control connectors.
![[D845EBT Power and Hardware Control Connectors]](/support/motherboards/desktop/d845ebt/img/bt_hdwr.gif)
| Item | Description | | A | +12 V power connector (ATX12V) | | B | Rear chassis fan | | C | Processor fan | | D | Main power | | E | Chassis intrusion | | F | Front chassis fan |
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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.
Note: Do not use a standard ATX power supply. The Intel Desktop Board D845EBT will not boot with a standard ATX power supply. Use only ATX12V-compliant power supplies with the Intel Desktop Board D845EBT. ATX12V power supplies have an additional power lead that provides required supplemental power for the Pentium® 4 processor. The Intel Desktop Board D845EBT will not boot if the ATX12V power supply is not connected to both the 4-pin and 20-pin power connectors.
Add-in Board and Peripheral Interface Connectors
The figure below shows the location of the add-in board and peripheral connectors for the Intel Desktop Board D845EBT. Note the following considerations for the PCI bus connectors: - All of the PCI bus connectors are bus master capable.
- PCI bus connector 1 has SMBus signals routed to it. This enables PCI bus add-in boards with SMBus support to access sensor data on the Intel Desktop Board D845EBT. The specific SMBus signals are as follows:
- The SMBus clock line is connected to pin A40
- The SMBus data line is connected to pin A41
![[D845EBT Add-in Board and Peripheral Interface Connectors]](/support/motherboards/desktop/d845ebt/img/bt_addin.gif)
| Item | Description | | A | CNR (optional) | | B | PCI bus connector 5 | | C | ATAPI-style CD-ROM | | D | PCI bus connector 4 | | E | PCI bus connector 3 | | F | PCI bus connector 2 | | G | PCI bus connector 1 | | H | AGP | | I | Secondary IDE (white) | | J | Primary IDE (black) | | K | Diskette drive | | L | SCSI LED | | M | Secondary IDE RAID (blue) | | N | Primary IDE RAID (blue) |
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External I/O Connectors
The figure below shows the location of the external I/O connectors.
![[D845EBT External I/O Connector]](/support/motherboards/desktop/d845ebt/img/bt_extrnl.gif)
| Item | Description | | A | Front panel audio | | B | Serial port B | | C | Auxiliary front panel power/sleep/message-waiting LED | | D | Front panel USB (black) | | E | Front panel | | F | Front panel IEEE 1394a-2000 (white) |
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Front Panel Connector
This section describes the functions of the front panel connector. The table below lists the signal names of the front panel connector.
| Pin | Signal | In/Out | Description | Pin | Signal | In/Out | Description | | Hard Drive Activity LED | Power LED | | 1 | HD_PWR | Out | Hard disk LED pull-up (330 ohm) to +5 V | 2 | HDR_BLNK_GRN | Out | Front panel green LED | | 3 | HAD# | Out | Hard disk active LED | 4 | HDR_BLNK_YEL | Out | Front panel yellow LED | | Reset Switch | On/Off Switch | | 5 | Ground | | Ground | 6 | FPBUT_IN | In | Power switch | | 7 | FP_RESET# | In | Reset switch | 8 | Ground | | Ground | | Power | No Connect | | 9 | +5 V | Out | Power | 10 | N/C | | Not connected |
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For more information about the front panel connector, see the Intel Desktop Board D845EBT Technical Product Specification
Updated: Monday, June 24, 2002
This applies to:
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End of Interactive Support DisclaimerThese products are no longer being manufactured by Intel. Additionally, Intel no longer provides interactive support for these products via telephone or e-mail, nor will Intel provide any future software updates to support new operating systems or improve compatibility with third party devices and software products.
THESE DOCUMENTS ARE PROVIDED FOR HISTORICAL REFERENCE PURPOSES ONLY AND ARE SUBJECT TO THE TERMS SET FORTH IN THE "Terms of use". For information on currently available Intel products, please see www.intel.com/products.
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Solution ID: CS-008786
Date Created: 25-Jan-2004
Last Modified: 16-Nov-2009
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