Filter
Top Products
Product Description
Depending on the LAN implementation, the Desktop Boards D925XCV and D925XBC support
LAN wake capabilities with ACPI in the following ways:
• The PCI Express WAKE# signal
• The PCI Conventional bus PME# signal for PCI 2.2 compliant LAN designs
• The onboard LAN subsystem
1.14.2.4 Instantly Available PC Technology
CAUTION
For Instantly Available PC technology, the +5 V standby line for the power supply must be capable
of providing adequate +5 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 Desktop Boards D925XCV and D925XBC 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 10 on page 43 lists the devices and events that can wake the computer from the
S3 state.
The Desktop Boards D925XCV and D925XBC support 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 2.2
compliant add-in cards, PCI Express add-in cards, and drivers.
1.14.2.5 Resume on Ring
The operation of Resume on Ring can be summarized as follows:
• Resumes operation from ACPI S1 or S3 states
• Detects incoming call similarly for external and internal modems
• Requires modem interrupt be unmasked for correct operation
1.14.2.6 Wake from USB
USB bus activity wakes the computer from ACPI S1 or S3 states.
✏
NOTE
Wake from USB requires the use of a USB peripheral that supports Wake from USB.
1.14.2.7 Wake from PS/2 Devices
PS/2 device activity wakes the computer from an ACPI S1 or S3 state.
1.14.2.8 PME# Signal Wake-up Support
When the PME# signal on the PCI Conventional bus is asserted, the computer wakes from an ACPI
S1, S3, S4, or S5 state (with Wake on PME enabled in BIOS).
45