Intel BOXDB43LD - B43 Chipset Executive Series, Manual, Page: 36 / 92

Intel Desktop Board DB43LD Technical Product Specification
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1.12.2.4 Instantly Available PC Technology
CAUTION
For Instantly Available PC technology, the +5 V standby line from the power supply
must be capable of providing ad5 V standby current. Failure to provide
adequate standby current when implementing Instantly Available PC technology can
damage the power supply.
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
power supply is off, and the front panel LED is amber if dual colored, or off if single
colored.) When signaled by a wake-up device or event, the system quickly returns to
its last known wake state. Table 9 on page 33 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.
The use of Instantly Available PC technology requires operating system support and
PCI 2.3 compliant add-in cards and drivers.
1.12.2.5 Wake from USB
USB bus activity wakes the computer from ACPI S1 or S3 state.
NOTE
Wake from USB requires the use of a USB peripheral that supports Wake from USB
and support in the operating system.
1.12.2.6 PME# Signal Wake-up Support
When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI
S1, S3, S4, or S5 state (with Wake on PME enabled in the BIOS).
1.12.2.7 WAKE# Signal Wake-up Support
When the WAKE# signal on the PCI Express bus is asserted, the computer wakes from
an ACPI S1, S3, S4, or S5 state.
1.12.2.8 Wake from PS/2 Devices
PS/2 device activity wakes the computer from an ACPI S1, S3, S4, or S5 state.
However, when the computer is in an S4 or S5 state, the only PS/2 activity that will
wake the computer is the alt-PrtScrn key combination on the keyboard.
1.12.2.9 Wake from Serial Port
Serial port activity wakes the computer from an ACPI S1 or S3 state.