S845WD1-E Server Board - Viglen Download
S845WD1-E Server Board - Viglen Download
S845WD1-E Server Board - Viglen Download
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Functional Architecture<br />
<strong>S845WD1</strong>-E <strong>Server</strong> <strong>Board</strong> TPS<br />
3.6.2.3 LAN Wake Capabilities<br />
CAUTION<br />
For LAN wake capabilities, the 5V standby line for the power supply must be capable of<br />
providing adequate +5 V standby current. Failure to provide adequate standby current when<br />
implementing LAN wake capabilities can damage the power supply. Refer to Section 9.2 for<br />
additional information.<br />
LAN wake capabilities enable remote wake-up of the computer through a network. The LAN<br />
subsystem PCI bus network adapter monitors network traffic at the Media Independent Interface.<br />
Upon detecting a Magic Packet* frame, the LAN subsystem asserts a wake-up signal that<br />
powers up the computer. Depending on the LAN implementation, the <strong>S845WD1</strong>-E server board<br />
supports LAN wake capabilities with ACPI in the following ways:<br />
• The PCI bus PME# signal for PCI 2.2 compliant LAN designs<br />
• The on-board LAN subsystem<br />
3.6.2.4 Instantly Available PC Technology<br />
CAUTION<br />
For Instantly Available PC technology, the +5V standby line for the power supply must be<br />
capable of providing adequate +5V standby current. Failure to provide adequate standby<br />
current when implementing Instantly Available PC technology can damage the power supply.<br />
Refer to Section 9.2 for additional information.<br />
Instantly Available PC technology enables the <strong>S845WD1</strong>-E server board to enter the ACPI S3<br />
(Suspend-to-RAM) sleep-state. While in the S3 sleep-state, the computer will appear to be off<br />
(the power supply is off, and the front panel LED is off.) When signaled by a wake-up device or<br />
event, the system quickly returns to its last known wake state. Table 6<br />
The <strong>S845WD1</strong>-E server board supports the PCI Bus Power Management Interface<br />
Specification. Add-in boards that support this specification can participate in power management<br />
and can be used to wake the computer.<br />
The use of Instantly Available PC technology requires operating system support and PCI 2.2<br />
compliant add-in cards and drivers.<br />
The standby power indicator LED (CR3G1) shows that power is still present even when the<br />
computer appears to be off. Figure 3 shows the location of the standby power indicator LED.<br />
CAUTION<br />
If AC power has been switched off and the standby power indicator is still lit, disconnect the<br />
power cord before installing or removing any devices connected to the board. Failure to do<br />
so could damage the board and any attached devices.<br />
20<br />
Intel order number A93850-002<br />
Revision 2.0
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