Intel D2550DC2 Technical product specification - Page 33

Instantly Available PC Technology, Wake from USB, PME# Signal Wake-up Support, an ACPI S3, S4

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Page 33 highlights

Product Description 1.11.2.3 Instantly Available PC Technology Instantly Available PC technology enables the board to enter the ACPI S3 (Suspend-toRAM) sleep-state. While in the S3 sleep-state, the computer will appear to be off (the hard drive(s) and fan will power off, the front panel LED will blink). When signaled by a wake-up device or event, the system quickly returns to its last known state. Table 8 on page 31 lists the devices and events that can wake the computer from the S3 state. The board supports the PCI Bus Power Management Interface Specification. Add-in boards that also support this specification can participate in power management and can be used to wake the computer. 1.11.2.4 Wake from USB USB bus activity wakes the computer from an ACPI S3 state. NOTE Wake from USB requires the use of a USB peripheral that supports Wake from USB and support in the operating system. 1.11.2.5 PME# Signal Wake-up Support When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI S3, S4, or S5 state (with Wake on PME enabled in the BIOS). 1.11.2.6 WAKE# Signal Wake-up Support When the WAKE# signal on the PCI Express bus is asserted, the computer wakes from an ACPI S3, S4, or S5 state. 33

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Product Description
33
1.11.2.3
Instantly Available PC Technology
Instantly Available PC technology enables the board to enter the ACPI S3 (Suspend-to-
RAM) sleep-state.
While in the S3 sleep-state, the computer will appear to be off (the
hard drive(s) and fan will power off, the front panel LED will blink).
When signaled by
a wake-up device or event, the system quickly returns to its last known state.
Table 8
on page 31 lists the devices and events that can wake the computer from the S3 state.
The board supports the
PCI Bus Power Management Interface Specification
.
Add-in
boards that also support this specification can participate in power management and
can be used to wake the computer.
1.11.2.4
Wake from USB
USB bus activity wakes the computer from an ACPI S3 state.
NOTE
Wake from USB requires the use of a USB peripheral that supports Wake from USB and
support in the operating system.
1.11.2.5
PME# Signal Wake-up Support
When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI
S3, S4, or S5 state (with Wake on PME enabled in the BIOS).
1.11.2.6
WAKE# Signal Wake-up Support
When the WAKE# signal on the PCI Express bus is asserted, the computer wakes from
an ACPI S3, S4, or S5 state.