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Intel® Desktop Board D845PECE
Connectors

Caution Only the back panel USB, the front panel USB, VGA, and PS/2 connectors of the Desktop Board D845PECE have overcurrent protection. The Desktop Boards' internal connectors 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:

Note When installing the D845PECE board in a microATX chassis, make sure that peripheral devices are installed at least 1.5 inches above the main power connector, the diskette drive connector, the IDE connector, and the DIMM sockets.

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.

[D845PECE Back Panel Connectors]

Item Description Color
A PS/2 mouse port Green
B PS/2 keyboard port Purple
C USB port Black
D USB port Black
E Serial port A Teal
F Parallel port Burgundy
G LAN (optional) Black
H USB Port Black
I USB Port Black
J Mic in (mono/stereo) Pink
K Audio line out Lime green
L Audio line in Light blue
Note The back panel audio line out connector is designed to power 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:

Audio, Power, and Hardware Control Connectors

The figure below shows the location of the audio, power, and hardware control connectors.

[D845PECE Audio Connectors]

Item Description
A Front panel audio
B Auxiliary line in, ATAPI style (white)
C Rear chassis fan
D ATAPI CD-ROM (black)
E +12 V power connector (ATX12V)
F Processor fan
G Main power
H Chassis intrusion
I Front chassis fan

Add-in Board and Peripheral Interface Connectors

The figure below shows the location of the add-in board connector and peripheral connectors for the Desktop Board D845PECE. Note the following considerations for the PCI bus connectors:

  • All of the PCI bus connectors are bus master capable.
  • SMBus signals routed to PCI bus connector 2. This enables PCI bus add-in boards with SMBus support to access sensor data on the Desktop Board. 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

[D845PECE Add-in Board and Peripheral Interface Connectors]

Item Description
A CNR (optional)
B PCI bus connector 6
C PCI bus connector 5
D PCI bus connector 4
E PCI bus connector 3
F PCI bus connector 2
G PCI bus connector 1
H AGP connector
I Diskette drive
J Primary IDE
K Secondary IDE
L SCSI LED

External I/O Connectors

The figure below shows the location of the external I/O connectors.

[D845PECE External I/O Connector]

Item Description
A Auxilary front panel power/sleep/message-waiting LED
B Front panel
C Font panel USB

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.

Front Panel Connector

Pin Signal In/Out Description Pin Signal In/Out Description
Hard Drive Ativity 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 SWITCH_ON# In Power switch
7 FP_RESET# In Reset switch 8 Ground   Ground
9 +5 V Out Power 10 N/C   Not connected

[D845PECE Front Panel]

For more information about the front panel connector, see the Intel® Desktop Board D845PECE Technical Product Specification

This applies to:
Intel® Desktop Board D845PECE

End of Interactive Support Disclaimer
These 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.
Solution ID: CS-020054
Date Created: 08-Dec-2004
Last Modified: 12-Mar-2009
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