Hardware Support - Intel D845HV Technical Product Specification

1.14.2 Hardware Support

CAUTION
Ensure that the power supply provides adequate +5 V standby current if LAN wake capabilities
and Instantly Available PC technology features are used. Failure to do so can damage the power
supply. The total amount of standby current required depends on the wake devices supported and
manufacturing options. Refer to Section 2.11.3 on page 79 for additional information.
The D845HV and D845WN boards provide several power management hardware features,
including:
Power connector
Fan connectors
LAN wake capabilities
Instantly Available PC technology
Resume on Ring
Wake from USB
Wake from PS/2 keyboard
PME# wake-up support
LAN wake capabilities and Instantly Available PC technology require power from the +5 V
standby line. The sections discussing these features describe the incremental standby power
requirements for each.
Resume on Ring enables telephony devices to access the computer when it is in a power-managed
state. The method used depends on the type of telephony device (external or internal).
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.
1.14.2.1 Power Connector
When used with an ATX12V- or SFX12V-compliant power supply that supports remote power
on/off, the D845HV and D845WN boards can turn off the system power through software control.
When the system BIOS receives the correct command from the operating system, the BIOS turns
off power to the computer.
With soft-off enabled, if power to the computer is interrupted by a power outage or a disconnected
power cord, when power resumes, 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 After Power Failure
feature in the BIOS Setup program's Boot menu.
For information about
The location of the power connector
The signal names of the power connector
The BIOS Setup program's Boot menu
The ATX specification
Product Description
Refer to
Figure 12, page 58
Table 32, page 60
Table 75, page 113
Section 1.5, page 18
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