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Intel D945GNT Product Specification - Page 44

WAKE# Signal Wake-up Support, 12.2.10, 5 V Standby Power Indicator LED, CAUTION

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Intel Desktop Board D945GNT Technical Product Specification 1.12.2.9 WAKE# Signal Wake-up Support When the WAKE# signal on the PCI Express bus is asserted, the computer wakes from an ACPI S1, S3, S4, or S5 state. 1.12.2.10 +5 V Standby Power Indicator LED The +5 V standby power indicator LED shows that power is still present even when the computer appears to be off. Figure 16 shows the location of the standby power indicator LED. CAUTION If AC power has been switched off and the standby power indicator is still lit, disconnect the power cord before installing or removing any devices connected to the board. Failure to do so could damage the board and any attached devices. CR3J1 OM17740 Figure 16. Location of the Standby Power Indicator LED 44

Section	Page
Intel® Desktop Board D945GNT 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 Manufacturing Options	11
1.1.3 Board Layout	12
1.1.4 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® 945G Chipset	21
1.5.1 Intel 945G Graphics Subsystem	21
1.5.2 USB	23
1.5.3 IDE Support	24
1.5.4 Real-Time Clock, CMOS SRAM, and Battery	26
1.6 PCI Express Connectors	26
1.7 IEEE-1394a Connectors (Optional)	26
1.8 Legacy I/O Controller	27
1.8.1 Serial Port	27
1.8.2 Parallel Port	27
1.8.3 Diskette Drive Controller	27
1.8.4 Keyboard and Mouse Interface	27
1.9 Audio Subsystem	28
1.9.1 Audio Subsystem Software	28
1.9.2 Audio Connectors	28
1.9.3 8-Channel (7.1) Audio Subsystem	29
1.9.4 6-Channel (5.1) Audio Subsystem	31
1.10 LAN Subsystem	32
1.10.1 LAN Subsystem Software	32
1.10.2 10/100 Mbits/sec LAN Subsystem	32
1.10.3 Gigabit LAN Subsystem	33
1.10.4 Intel Active Management Technology (Optional)	34
1.10.5 Alert Standard Format (ASF) Support (Optional)	36
1.11 Hardware Management Subsystem	36
1.11.1 Hardware Monitoring and Fan Control ASIC	37
1.11.2 Chassis Intrusion and Detection	37
1.11.3 Fan Monitoring	37
1.11.4 Thermal Monitoring	38
1.12 Power Management	39
1.12.1 ACPI	39
1.12.2 Hardware Support	41
1.13 Trusted Platform Module (Optional)	45
2 Technical Reference	47
2.1 Introduction	47
2.2 Memory Resources	47
2.2.1 Addressable Memory	47
2.2.2 Memory Map	49
2.3 DMA Channels	49
2.4 Fixed I/O Map	50
2.5 PCI Configuration Space Map	51
2.6 Interrupts	52
2.7 PCI Conventional Interrupt Routing Map	53
2.8 Connectors	55
2.8.1 Back Panel Connectors	55
2.8.2 Component-side Connectors	58
2.9 Jumper Block	67
2.10 Mechanical Considerations	68
2.10.1 Form Factor	68
2.10.2 I/O Shield	69
2.11 Electrical Considerations	71
2.11.1 DC Loading	71
2.11.2 Add-in Board Considerations	71
2.11.3 Fan Connector Current Capability	72
2.11.4 Power Supply Considerations	72
2.12 Thermal Considerations	73
2.13 Reliability	75
2.14 Environmental	76
2.15 Regulatory Compliance	77
2.15.1 Safety Regulations	77
2.15.2 EMC Regulations	77
2.15.3 European Union Declaration of Conformity Statement	78
2.15.4 Recycling Considerations	79
2.15.5 Product Certification Markings (Board Level)	80
3 Overview of BIOS Features	81
3.1 Introduction	81
3.2 BIOS Flash Memory Organization	82
3.3 Resource Configuration	82
3.3.1 PCI Autoconfiguration	82
3.3.2 PCI IDE Support	82
3.4 System Management BIOS (SMBIOS)	83
3.5 Legacy USB Support	83
3.6 BIOS Updates	84
3.6.1 Language Support	84
3.6.2 Custom Splash Screen	84
3.7 Boot Options	85
3.7.1 CD-ROM Boot	85
3.7.2 Network Boot	85
3.7.3 Booting Without Attached Devices	85
3.7.4 Changing the Default Boot Device During POST	85
3.8 Adjusting Boot Speed	86
3.8.1 Peripheral Selection and Configuration	86
3.8.2 BIOS Boot Optimizations	86
3.9 BIOS Security Features	87
4 Error Messages and Beep Codes	89
4.1 Speaker	89
4.2 BIOS Beep Codes	89
4.3 BIOS Error Messages	89