Back Panel I/O Connectors Component-side I/O Connectors Front Panel Connectors

Front Panel USB Connectors Front Panel IEEE 1394a Connectors (Optional)

Back Panel I/O Connectors

The back panel configuration is dependent upon which audio subsystem is present. The configurations are as follows: 8-channel (7.1) audio subsystem (five analog audio output connectors and two digital audio output connectors) 6-channel (5.1) audio subsystem (three analog audio output connectors)

Back Panel Connectors For 8-Channel (7.1) Audio Subsystem

The figure below shows the location of the back panel connectors for boards equipped with the 8-channel (7.1) audio subsystem. The back panel connectors are color-coded. The figure legend below lists the colors used (when applicable).

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.

Item Description Color A PS/2* mouse port Green B PS/2 keyboard port Purple C Serial port A Teal D Parallel port Burgundy E Digital audio out coaxial Orange F Digital audio out optical   G Front left/right channel audio out/Two channel audio line out/Retasking Jack D Lime green H Surround left/right channel audio out/Retasking Jack H Black I Center channel and LFE (subwoofer) audio out/Retasking Jack G Orange J Audio line in/Retasking Jack C Blue K Mic in/Retasking Jack B Pink L USB ports (two)   M IEEE-1394a connector (optional)   N LAN   O USB ports (two)

Back Panel Connectors For 6-Channel (5.1) Audio Subsystem

The figure below shows the location of the back panel connectors for boards equipped with the 6-channel (5.1) audio subsystem. The back panel connectors are color-coded. The figure legend below lists the colors used (when applicable).

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.

Item Description Color A PS/2* mouse port Green B PS/2 keyboard port Purple C Serial port A Teal D Parallel port Burgundy E Audio line in/Retasking Jack C Blue F Front left/right channel audio out/Two channel audio line out/Retasking Jack D Lime green G Mic in/Retasking Jack B Pink H USB ports (two)   I IEEE-1394a connector (optional)   J LAN   K USB ports (two)

Component-side I/O Connectors

The figure below shows the location of the component-side connectors of the D925XEBC2 board.

Item Description A PCI Express* x1 bus add-in card connector B Front panel audio connector C PCI Conventional* bus add-in card connector 2 D Front panel IEEE-1394a connector (optional) E PCI Conventional bus add-in card connector 1 F PCI Express x16 bus add-in card connector G Rear chassis fan connector H Alternate power connector I +12V power connector (ATX12V) J Processor fan connector K Power connector L Diskette drive connector M Parallel ATA IDE connector N Chassis intrusion connector O Front chassis fan connector P Serial ATA connector 1 Q Serial ATA connector 3 R Serial ATA connector 2 S Serial ATA connector 0 T Auxiliary front panel power LED connector U Front panel connector V Front panel USB connector W Front panel USB connector X Front panel IEEE-1394a connector (optional) Y ATAPI CD-ROM connector (optional)

Add-in Card Connectors

The board has the following add-in card connectors:

PCI Express* x16: one connector supporting simultaneous transfer speeds up to 8 GBytes/sec PCI Express x1: the D925XEBC2 board has one PCI Express x1 connector. The x1 interfaces support simultaneous transfer speeds up to 500 MBytes/sec PCI Conventional* (rev 2.2 compliant) bus: the D925XEBC2 board has two PCI Conventional add-in card connectors. The SMBus is routed to PCI Conventional bus connector 2 only (ATX expansion slot 6). PCI Conventional bus add-in cards with SMBus support can access sensor data and other information residing on the Desktop Board. Note the following considerations for the PCI Conventional bus connectors: All of the PCI Conventional bus connectors are bus master capable SMBus signals are routed to PCI Conventional bus connector 2. This enables PCI Conventional 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

Front Panel Connectors

This section describes the front panel connectors. Front Panel Connector Front Panel USB Connectors Front Panel IEEE1394a Connectors (Optional)

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. The figure below is a connection diagram for the front panel connector.

Pin Signal In/Out Description Pin Signal In/Out Description Hard Drive Activity LED [Yellow] Power LED [Green] 1 HD_PWR Out Hard disk LED pull-up (750 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 [Purple] On/Off Switch [Red] 5 Ground   Ground 6 FPBUT_IN In Power switch 7 FP_RESET# In Reset switch 8 Ground   Ground Power Not Connected 9 +5 V   Power 10 N/C   Not connected

Front Panel USB Connectors

The figure below is a connection diagram for the front panel USB connectors.

Integrator's Notes The +5 V DC power on the USB connector is fused. Pins 1, 3, 5, and 7 comprise one USB port. Pins 2, 4, 6, and 8 comprise one USB port. Use only a front panel USB connector that conforms to the USB 2.0 specification for high-speed USB devices.

Front Panel IEEE 1394a Connectors (Optional)

The figure below is a connection diagram for the IEEE 1394a connectors.

Integrator's Notes The IEEE 1394a connectors are colored blue. The +12 V DC power on the IEEE 1394a connectors is fused. Each IEEE 1394a connector provides one IEEE 1394a port. For more information about the connectors, see the Intel® Desktop Board D925XEBC2 Technical Product Specification

Updated: Monday, November 1, 2004