
Desktop Board Features
23
Wake from USB
NOTE
Wake from USB requires the use of a USB peripheral that supports Wake from USB.
USB bus activity wakes the computer from an ACPI S1 or S3 state.
PME# Signal Wake-up
When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI
S1, S3, S4, or S5 (LAN only) state.
Wake From PS/2 Devices
PS/2 device activity wakes the computer from an ACPI S1 or S3 state.
Wake From Serial Devices
Serial port activity wakes the computer from an ACPI S1 or S3 state.
Speaker
A speaker is mounted on the Desktop Board. The speaker provides audible error code
(beep code) information during the Power-On Self-Test (POST).
Battery
A battery on the Desktop Board keeps the values in CMOS RAM and the clock current
when the computer is turned off. Go to page 47 for instructions on how to replace the
battery.
Real-Time Clock
The Desktop Board has a time-of-day clock and 100-year calendar. The battery on the
Desktop Board keeps the clock current when the computer is turned off.