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Standby Current Requirements

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Technical Reference 2.11.3 Standby Current Requirements CAUTION If the standby current necessary to support multiple wake events from the PCI and/or USB buses exceeds power supply capacity, the D845HV and D845WN boards may lose register settings stored in memory, etc. Calculate the standby current requirements using the steps described below. Power supplies used with the D845HV and D845WN boards must be able to provide enough standby current to support the Instantly Available PC (ACPI S3 sleep state) configuration as outlined in Table 51 below. Values are determined by specifications such as PCI 2.2. Actual measured values may vary. To estimate the amount of standby current required for a particular system configuration, standby current requirements of all installed components must be added to determine the total standby current requirement. Refer to the descriptions in Table 51 and review the following steps. 1. Note the total D845HV or D845WN board standby current requirement. 2. Add to that the total PS/2 port standby current requirement if a wake-enabled device is connected. 3. Add, from the PCI 2.2 slots (wake enabled) row, the total number of wake-enabled devices installed (PCI and AGP) and multiply by the standby current requirement. 4. Add, from the PCI 2.2 slots (nonwake enabled) row, the total number of wake-enabled devices installed (PCI and AGP) and multiply by the standby current requirement. 5. Add all additional wake-enabled devices' and nonwake-enabled devices' standby current requirements as applicable. 6. Add all the required current totals from steps 1 through 5 to determine the total estimated standby current power supply requirement. Table 51. Standby Current Requirements Instantly Available PC Current Support (Estimated for Integrated Board Components) Instantly Available PC Stand-by Current Support • Estimated for add-on components • Add to Instantly Available PC total current requirement (See instructions above) Description Total for D845HV board PS/2 ports (Note) PCI 2.2 slots (wake enabled) PCI 2.2 slots (nonwake enabled) CNR (Note) USB ports (Note) Note: Dependent upon system configuration Standby Current Requirements (mA) 394 345 375 20 375 500 79

Section	Page
Intel® Desktop Board D845HV/D845WN Technical Product Specification	1
Revision History / Disclaimer	2
Preface	3
Intended Audience	3
What This Document Contains	3
Typographical Conventions	3
Notes, Cautions, and Warnings	3
Other Common Notation	4
Contents	5
1 Product Description	11
1.1 Board Differences	11
1.2 Overview	12
1.2.1 Feature Summary	12
1.2.2 Manufacturing Options	13
1.2.3 Board Layouts	14
1.2.4 Block Diagram	16
1.3 Online Support	17
1.4 Operating System Support	17
1.5 Design Specifications	18
1.6 Processor	21
1.7 System Memory	22
1.8 Intel® 845 Chipset	24
1.8.1 AGP	25
1.8.2 USB	25
1.8.3 IDE Support	27
1.8.4 Real-Time Clock, CMOS SRAM, and Battery	28
1.8.5 Intel® 82802AB 4 Mbit Firmware Hub (FWH)	29
1.9 I/O Controller	29
1.9.1 Serial Ports	29
1.9.2 Infrared Support	30
1.9.3 Parallel Port	30
1.9.4 Diskette Drive Controller	31
1.9.5 Keyboard and Mouse Interface	31
1.9.6 I/O Controller Option	31
1.10 Audio Subsystem (Optional)	32
1.10.1 Audio Connectors	33
1.10.2 Audio Subsystem Software	33
1.11 LAN Subsystem (Optional)	34
1.11.1 Intel® 82562ET Platform LAN Connect Device	34
1.11.2 RJ-45 LAN Connector with Integrated LEDs	34
1.11.3 LAN Subsystem Software	35
1.12 CNR (Optional)	35
1.13 Hardware Management Subsystem	36
1.13.1 Hardware Monitor Component (Optional)	36
1.13.2 Fan Monitoring	36
1.13.3 Chassis Intrusion and Detection	37
1.14 Power Management	37
1.14.1 ACPI	37
1.14.2 Hardware Support	41
2 Technical Reference	45
2.1 Introduction	45
2.2 Memory Map	45
2.3 I/O Map	46
2.4 DMA Channels	48
2.5 PCI Configuration Space Map	48
2.6 Interrupts	49
2.7 PCI Interrupt Routing Map	49
2.8 Connectors	51
2.8.1 Back Panel Connectors	52
2.8.2 Internal I/O Connectors	55
2.8.3 External I/O Connectors	68
2.9 Jumper Blocks	72
2.9.1 Front Panel Audio Connector/Jumper Block	72
2.9.2 BIOS Setup Configuration Jumper Block	73
2.10 Mechanical Considerations	74
2.10.1 D845HV Form Factor	74
2.10.2 D845WN Form Factor	75
2.10.3 I/O Shield	76
2.11 Electrical Considerations	78
2.11.1 Power Consumption	78
2.11.2 Add-in Board Considerations	78
2.11.3 Standby Current Requirements	79
2.11.4 Fan Connector Current Capability	80
2.11.5 Power Supply Considerations	80
2.12 Thermal Considerations	81
2.13 Reliability	83
2.14 Environmental	83
2.15 Regulatory Compliance	84
2.15.1 Safety Regulations	84
2.15.2 EMC Regulations	84
2.15.3 Product Certification Markings (Board Level)	85
3 Overview of BIOS Features	87
3.1 Introduction	87
3.2 BIOS Flash Memory Organization	88
3.3 Resource Configuration	88
3.3.1 PCI Autoconfiguration	88
3.3.2 PCI IDE Support	88
3.4 System Management BIOS (SMBIOS)	89
3.5 Legacy USB Support	89
3.6 BIOS Updates	90
3.6.1 Language Support	91
3.6.2 Custom Splash Screen	91
3.7 Recovering BIOS Data	91
3.8 Boot Options	92
3.8.1 CD-ROM and Network Boot	92
3.8.2 Booting Without Attached Devices	92
3.9 Fast Booting Systems with Intel® Rapid BIOS Boot	92
3.9.1 Peripheral Selection and Configuration	92
3.9.2 Intel Rapid BIOS Boot	93
3.10 BIOS Security Features	94
4 BIOS Setup Program	95
4.1 Introduction	95
4.2 Maintenance Menu	96
4.2.1 Extended Configuration Submenu	97
4.3 Main Menu	98
4.4 Advanced Menu	99
4.4.1 PCI Configuration Submenu	100
4.4.2 Boot Configuration Submenu	101
4.4.3 Peripheral Configuration Submenu	102
4.4.4 IDE Configuration Submenu	104
4.4.5 Diskette Configuration Submenu	107
4.4.6 Event Log Configuration Submenu	108
4.4.7 Video Configuration Submenu	109
4.5 Security Menu	110
4.6 Power Menu	111
4.6.1 ACPI Submenu	112
4.7 Boot Menu	113
4.7.1 Boot Device Priority Submenu	114
4.7.2 Hard Disk Drives Submenu	115
4.7.3 Removable Devices Submenu	115
4.7.4 ATAPI CD-ROM Drives Submenu	116
4.8 Exit Menu	117
5 Error Messages and Beep Codes	119
5.1 BIOS Error Messages	119
5.2 Port 80h POST Codes	121
5.3 Bus Initialization Checkpoints	125
5.4 Speaker (Optional)	126

Match case Limit results 1 per page

Technical Reference

2.11.3

Standby Current Requirements

CAUTION

If the standby current necessary to support multiple wake events from the PCI and/or USB buses

exceeds power supply capacity, the D845HV and D845WN boards may lose register settings stored

in memory, etc.

Calculate the standby current requirements using the steps described below.

Power supplies used with the D845HV and D845WN boards must be able to provide enough

standby current to support the Instantly Available PC (ACPI S3 sleep state) configuration as

outlined in Table 51 below.

Values are determined by specifications such as PCI 2.2.

Actual measured values may vary.

To estimate the amount of standby current required for a particular system configuration, standby

current requirements of all installed components must be added to determine the total standby

current requirement.

Refer to the descriptions in Table 51 and review the following steps.

Note the total D845HV or D845WN board standby current requirement.

Add to that the total PS/2 port standby current requirement if a wake-enabled device is

connected.

Add, from the PCI 2.2 slots (wake enabled) row, the total number of wake-enabled devices

installed (PCI and AGP) and multiply by the standby current requirement.

Add, from the PCI 2.2 slots (nonwake enabled) row, the total number of wake-enabled devices

installed (PCI and AGP) and multiply by the standby current requirement.

Add all additional wake-enabled devices’ and nonwake-enabled devices’ standby current

requirements as applicable.

Add all the required current totals from steps 1 through 5 to determine the total estimated

standby current power supply requirement.

Table 51.

Standby Current Requirements

Description

Standby Current

Requirements (mA)

Instantly Available PC Current

Support (Estimated for

Integrated Board Components)

Total for D845HV board

394

PS/2 ports

(Note)

345

PCI 2.2 slots (wake enabled)

375

PCI 2.2 slots (nonwake enabled)

CNR

(Note)

375

Instantly Available PC Stand-by

Current Support

•

Estimated for add-on

components

•

Add to Instantly Available

PC total current

requirement

(See instructions above)

USB ports

(Note)

500

Note:

Dependent upon system configuration