Chapter 1: Overview
1-19
1-5 ACPI Features
ACPI stands for Advanced Conguration and Power Interface. The ACPI specica-
tion denes a exible and abstract hardware interface that provides a standard
way to integrate power management features throughout a PC system, including
its hardware, operating system and application software. This enables the system
to automatically turn on and off peripherals such as CD-ROMs, network cards, hard
disk drives and printers.
In addition to operating_system-directed power management, ACPI also provides
a generic system event mechanism for Plug and Play, and an operating system-
independent interface for conguration control. ACPI leverages the Plug and Play
BIOS data structures, while providing a processor architecture-independent imple-
mentation that is compatible with Windows 7, Windows Vista and Windows 2008
Operating Systems.
Slow Blinking LED for Suspend-State Indicator
When the CPU goes into a suspend state, the chassis power LED will start blinking
to indicate that the CPU is in suspend mode. When the user presses any key, the
CPU will "wake up," and the LED will automatically stop blinking and remain on.
1-6 Power Supply
As with all computer products, a stable power source is necessary for proper and
reliable operation. It is even more important for processors that have high CPU
clock rates.
The X9DRG-O(T)F-CPU/X9DRG-O-PCIE Platform supports SMC-Proprietary pow-
er connectors. In areas where noisy power transmission is present, you may choose
to install a line lter to shield the computer from noise. It is recommended that you
also install a power surge protector to help avoid problems caused by power surges.
Note: Please use SMC-proprietary power supply as specied as above.
This motherboard does not support any power supply manufactured by
other manufacturer.
1-7 UART
The COM port is a 16550 compatible serial communication header (UART). The
UART includes a 16-byte send/receive FIFO, a programmable baud rate generator,
complete modem control capability, and a processor interrupt system. The UART
provides legacy speed with baud rate of up to 115.2 Kbps.
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