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Standby Current Requirements

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Intel Desktop Board D850MD/D850MV Technical Product Specification 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 D850MD and D850MV boards may lose register settings stored in memory, etc. Calculate the standby current requirements using the steps described below. Power supplies used with the D850MD and D850MV boards must be able to provide enough standby current to support the Instantly Available (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 standby current required for the D850MD or D850MV board. 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 (non-wake enabled) row, the total number of wake-enabled devices installed (PCI and AGP) and multiply by the standby current requirement. 5. Add the standby current requirements for all additional wake-enabled and non-wake-enabled devices 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 Current Support (Estimated for Integrated Board Components) Instantly Available Standby Current Support • Estimated for add-on components • Add to Instantly Available total current requirement (See instructions above) Description Total for D850MD board PS/2 ports (Note) PCI 2.2 slots (wake enabled) PCI 2.2 slots (non-wake enabled) CNR (Note) USB ports (Note) Note: Dependent upon system configuration Standby Current Requirements (mA) 375 345 375 20 375 500 80

Section	Page
Intel® Desktop Board D850MD/D850MV 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	18
1.4 Operating System Support	18
1.5 Design Specifications	19
1.6 Processor	22
1.7 System Memory	23
1.7.1 Memory Features	23
1.7.2 Continuity RIMM Modules	23
1.7.3 RDRAM Memory Configuration	24
1.8 Intel® 850 Chipset	25
1.8.1 AGP	26
1.8.2 USB	27
1.8.3 IDE Support	29
1.8.4 Real-Time Clock, CMOS SRAM, and Battery	30
1.8.5 Intel® 82802AB 4 Mbit FWH	30
1.9 I/O Controller	31
1.9.1 Serial Port	31
1.9.2 Parallel Port	32
1.9.3 Diskette Drive Controller	32
1.9.4 Keyboard and Mouse Interface	32
1.10 Audio Subsystem	33
1.10.1 Audio Connectors	34
1.10.2 Audio Subsystem Software	34
1.11 LAN Subsystem (Optional)	35
1.11.1 Intel® 82562ET PLC Device	35
1.11.2 RJ-45 LAN Connector with Integrated LEDs	35
1.11.3 LAN Subsystem Software	36
1.12 CNR (Optional)	36
1.13 Hardware Management Subsystem	37
1.13.1 Hardware Monitor Component	37
1.13.2 Fan Control and Monitoring	37
1.14 Power Management	38
1.14.1 Software Support	38
1.14.2 Hardware Support	42
2 Technical Reference	47
2.1 Introduction	47
2.2 Memory Map	47
2.3 I/O Map	48
2.4 DMA Channels	50
2.5 PCI Configuration Space Map	50
2.6 Interrupts	51
2.7 PCI Interrupt Routing Map	51
2.8 Connectors	53
2.8.1 Back Panel Connectors	54
2.8.2 Internal I/O Connectors	57
2.8.3 External I/O Connectors	70
2.9 Jumper Block	74
2.10 Mechanical Considerations	76
2.10.1 D850MD Form Factor	76
2.10.2 D850MV Form Factor	77
2.10.3 I/O Shield	78
2.11 Electrical Considerations	79
2.11.1 Power Consumption	79
2.11.2 Add-in Board Considerations	79
2.11.3 Standby Current Requirements	80
2.11.4 Fan Connector Current Capability	81
2.11.5 Power Supply Considerations	81
2.12 Thermal Considerations	82
2.13 Reliability	83
2.14 Environmental	84
2.15 Regulatory Compliance	85
2.15.1 Safety Regulations	85
2.15.2 EMC Regulations	85
2.15.3 Product Certification Markings (Board Level)	86
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 SMBIOS	89
3.5 Legacy USB Support	89
3.6 BIOS Updates	90
3.6.1 Language Support	90
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
3.9.3 Operating System	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 APM Submenu	112
4.6.2 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	116
5 Error Messages and Beep Codes	117
5.1 BIOS Error Messages	117
5.2 Port 80h POST Codes	119
5.3 Bus Initialization Checkpoints	123
5.4 Speaker	124

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Intel Desktop Board D850MD/D850MV Technical Product Specification

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 D850MD and D850MV boards may lose register settings

stored in memory, etc.

Calculate the standby current requirements using the steps described

below.

Power supplies used with the D850MD and D850MV boards must be able to provide enough

standby current to support the Instantly Available (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 standby current required for the D850MD or D850MV board.

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 (non–wake enabled) row, the total number of wake-enabled

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

Add the standby current requirements for all additional wake-enabled and non-wake-enabled

devices 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 Current

Support (Estimated for

Integrated Board Components)

Total for D850MD board

375

PS/2 ports

(Note)

345

PCI 2.2 slots (wake enabled)

375

PCI 2.2 slots (non–wake enabled)

CNR

(Note)

375

Instantly Available Standby

Current Support

•

Estimated for add-on

components

•

Add to Instantly Available

total current requirement

(See instructions above)

USB ports

(Note)

500

Note:

Dependent upon system configuration