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A1SAi & A1SRi Series Motherboard User’s Manual
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 enabling 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
implementation that is compatible with Windows 7, Windows 8, and Windows 2008
Operating Systems.
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.
Note 1: The A1SAi and A1SRi MB series motherboard alternatively sup-
ports a 4-pin 12V DC input power supply for embedded applications. The
12V DC input is limited to 12A by design. It provides up to 144W power
input to the motherboard. Please keep onboard power use within the power
limits specied above. Over-current DC power use may cause damage to
the motherboard!
Note 2: Do not use the 4-pin DC power @J1 when the 24-pin ATX Power
@JPW1 is connected to the power supply. Do not plug in both J1 and
JPW1 at the same time.
It is strongly recommended that you use a high quality power supply that meets ATX
power supply Specication 2.02 or above. It must also be SSI compliant. (For more
information, please refer to the web site at http://www.ssiforum.org/). Additionally, 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.
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