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Included on this page:
Connectors
CAUTION
Only the back panel USB, the front panel USB, VGA, and PS/2 connectors of the Desktop Board D845GEBV2 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 D845GEBV2 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.
| 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 |
VGA port |
Dark Blue |
| H |
USB Port |
Black |
| I |
LAN (optional) |
Black |
| J |
USB port |
Blank |
| K |
Mic in |
Pink |
| L |
Audio line out |
Lime green |
| M |
Audio line in |
Light blue | |
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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
The figure below shows the location of the audio, power, and hardware 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 | |
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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. Note the following considerations for the PCI bus connectors:
- All of the PCI bus connectors are bus master capable.
- SMBus signals are routed to PCI bus connector 2. This enables PCI bus add-in boards with bodycopyBus support to access sensor data on the Desktop Board. The specific bodycopyBus signals are as follows:
- The SMBus clock line is connected to pin A40
- The SMBus data line is connected to pin A41
| 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 | |
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External I/O Connectors
The figure below shows the location of the external I/O connectors.
| Item |
Description |
| A |
Auxilary front panel power/sleep/message-waiting LED |
| B |
Front panel |
| C |
Front panel USB | |
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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.
Hard Drive Activity LED
| Pin |
Signal |
In/Out |
Description |
| 1 |
HD_PWR |
Out |
Hard disk LED pull-up (330 ohm) to +5 V |
| 3 |
HAD# |
Out |
Hard disk active LED | |
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Power LED
| Pin |
Signal |
In/Out |
Description |
| 2 |
HDR_BLNK_GRN |
Out |
Front panel green LED |
| 4 |
HDR_BLNK_YEL |
Out |
Front panel yellow LED | |
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Reset Switch
| Pin |
Signal |
In/Out |
Description |
| 5 |
Ground |
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Ground |
| 7 |
FP_RESET# |
In |
Reset switch |
| 9 |
+5 V |
Out |
Power | |
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On/Off Switch
| Pin |
Signal |
In/Out |
Description |
| 6 |
FPBUT_IN |
In |
Power switch |
| 8 |
Ground |
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Ground |
| 10 |
N/C |
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Not connected | |
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Front Panel Connector
For more information about the front panel connector, see the Intel® Desktop Board D845GEBV2 Technical Product Specification
This applies to:
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