Intel D925XHY D925XHY Technical Product Specification - Page 39

Product Description

39

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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.

1.11.2.1

Power Connector

ATX12V-compliant power supplies can turn off the system power through system control.

When

an ACPI-enabled system receives the correct command, the power supply removes all non-standby

voltages.

When resuming from an AC power failure, the computer returns to the power state it was in before

power was interrupted (on or off).

The computer’s response can be set using the Last Power State

feature in the BIOS Setup program’s Boot menu.

For information about

Refer to

The location of the power connector

Figure 16, page 52

The signal names of the power connector

Table 21, page 56

1.11.2.2

Fan Connectors

The function/operation of the fan connectors is as follows:

•

The fans are on when the board is in the S0 or S1 state.

•

The fans are off when the board is off or in the S3, S4, or S5 state.

•

Each fan connector is wired to a fan tachometer input of the hardware monitoring and fan

control ASIC

•

All fan connectors support closed-loop fan control that can adjust the fan speed or switch the

fan on or off as needed.

•

All fan connectors have a +12 V DC connection

For information about

Refer to

The location of the fan connectors

Figure 16, page 52

The location of the fan connectors and sensors for thermal monitoring

Figure 12, page 34

The signal names of the fan connectors

Section 2.8.2, page 52

1.11.2.3

LAN Wake Capabilities

CAUTION

For LAN wake capabilities, the +5 V standby line for the power supply must be capable of

providing adequate +5 V standby current.

Failure to provide adequate standby current when

implementing LAN wake capabilities can damage the power supply.

LAN wake capabilities enable remote wake-up of the computer through a network.

The LAN

network adapter monitors network traffic at the Media Independent Interface.

Upon detecting a

Magic Packet* frame, the LAN subsystem asserts a wake-up signal that powers up the computer.

Depending on the LAN implementation, the board supports LAN wake capabilities with ACPI in

the following ways:

•

The PCI Express WAKE# signal

Section	Page
Intel® Desktop Board D925XHY Technical Product Specification	1
Revision History / Disclaimer	2
Preface	3
Intended Audience	3
What This Document Contains	3
Typographical Conventions	3
Other Common Notation	4
Contents	5
1 Product Description	9
1.1 Overview	10
1.1.1 Feature Summary	10
1.1.2 Board Layout	12
1.1.3 Block Diagram	14
1.2 Online Support	15
1.3 Processor	15
1.4 System Memory	16
1.4.1 Memory Configurations	17
1.5 Intel® 925X Chipset	21
1.5.1 USB	21
1.5.2 IDE Support	21
1.5.3 Real-Time Clock, CMOS SRAM, and Battery	24
1.6 PCI Express* Connectors	28
1.7 Legacy I/O Controller	28
1.7.1 Serial Port	28
1.7.2 Parallel Port	29
1.7.3 Diskette Drive Controller	29
1.7.4 Keyboard and Mouse Interface	29
1.8 Audio Subsystem	30
1.8.1 Audio Subsystem Software	30
1.8.2 Audio Connectors	30
1.8.3 8-Channel (7.1) Audio Subsystem	30
1.9 LAN Subsystem	32
1.9.1 Marvell* Yukon* 88E8036 PCI Express 10/100 Ethernet Controller	32
1.9.2 RJ-45 LAN Connector with Integrated LEDs	32
1.9.3 LAN Subsystem Software	32
1.10 Hardware Management Subsystem	33
1.10.1 Hardware Monitoring and Fan Control ASIC	33
1.10.2 Thermal Monitoring	34
1.10.3 Fan Monitoring	35
1.10.4 Chassis Intrusion and Detection	35
1.11 Power Management	35
1.11.1 ACPI	36
1.11.2 Hardware Support	38
2 Technical Reference	43
2.1 Introduction	43
2.2 Memory Resources	43
2.2.1 Addressable Memory	43
2.2.2 Memory Map	45
2.3 DMA Channels	45
2.4 Fixed I/O Map	46
2.5 PCI Configuration Space Map	47
2.6 Interrupts	48
2.7 PCI Conventional Interrupt Routing Map	49
2.8 Connectors	50
2.8.1 Back Panel Connectors	50
2.8.2 Component-side Connectors	52
2.9 Jumper Block	61
2.10 Mechanical Considerations	62
2.10.1 Form Factor	62
2.10.2 I/O Shield	63
2.11 Electrical Considerations	64
2.11.1 DC Loading	64
2.11.2 Add-in Board Considerations	64
2.11.3 Fan Connector Current Capability	65
2.11.4 Power Supply Considerations	65
2.12 Thermal Considerations	66
2.13 Reliability	68
2.14 Environmental	69
2.15 Regulatory Compliance	70
2.15.1 Safety Regulations	70
2.15.2 European Union Declaration of Conformity Statement	70
2.15.3 Product Ecology Statements	72
2.15.4 EMC Regulations	74
2.15.5 Product Certification Markings (Board Level)	76
3 Overview of BIOS Features	77
3.1 Introduction	77
3.2 BIOS Flash Memory Organization	78
3.3 Resource Configuration	78
3.3.1 PCI Autoconfiguration	78
3.3.2 PCI IDE Support	78
3.4 System Management BIOS (SMBIOS)	79
3.5 Legacy USB Support	79
3.6 BIOS Updates	80
3.6.1 Language Support	80
3.6.2 Custom Splash Screen	80
3.7 Boot Options	81
3.7.1 CD-ROM Boot	81
3.7.2 Network Boot	81
3.7.3 Booting Without Attached Devices	81
3.7.4 Changing the Default Boot Device During POST	81
3.8 Fast Booting Systems with Intel® Rapid BIOS Boot	82
3.8.1 Peripheral Selection and Configuration	82
3.8.2 Intel Rapid BIOS Boot	82
3.9 BIOS Security Features	83
4 Error Messages and Beep Codes	85
4.1 BIOS Error Messages	85
4.2 Port 80h POST Codes	87
4.3 Bus Initialization Checkpoints	91
4.4 Speaker	92

Intel D925XHY D925XHY Technical Product Specification - Page 39

Power Connector, 11.2.2, Fan Connectors, 11.2.3, LAN Wake Capabilities, CAUTION

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