1-12
PDSMA+
User’s Manual
1-6 ACPI
Features
ACPI stands for Advanced Confi guration and Power Interface. The ACPI specifi ca-
tion defi nes a fl exible and abstract hardware interface that integrates power man-
agement features with other components of a PC system, including its hardware,
operating system and application software. This enables the system to automati-
cally turn on and off peripherals such as CD-ROMs, network cards, hard disk drives
and printers. This also includes other devices connected to the PC such as VCRs,
TVs, telephones and stereos.
In addition to enabling operating system-directed power management, ACPI
provides a generic system event mechanism for Plug and Play and an operating
system-independent interface for confi guration control. ACPI leverages the Plug
and Play BIOS data structures while providing a processor architecture-indepen-
dent implementation that is compatible with both Windows and Linux Operating
Systems.
1-7 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 of 1 GHz and faster.
The
PDSMA+ accommodates 12V ATX power supplies. Although most
power supplies generally meet the specifi cations required by the CPU, some are
inadequate. A 2 amps of current supply on a 5V Standby rail is strongly recom-
mended. It is strongly recommended that you use a high quality power supply that
meets ATX power supply Specifi cation 2.02 or above. Also your power supply must
supply 1.5A for the Ethernet ports. It must also be SSI compliant (info at http://www.
ssiforum.org/). Additionally, in areas where noisy power transmission is present,
you may choose to install a line fi lter to shield the computer from noise. It is recom-
mended that you also install a power surge protector to help avoid problems caused
by power surges. To provide adequate power supply to the system, the additional
8-pin 12V power is also required.
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