P555 F5
User's
Manual
1.5
ACPI
Features
ACPI
stands
for
Advanced
Configuration
and
Power
Interface.
The
ACPI
specification
defines
a
flexible
and
abstract
hardware
interface
that
provides
a
standard
way
to
integrate
power
management
features
throughout
a
computer
system
including
its
hardware,
operating
system
and
application
software.
This
enables
the
system
to
automatically
turn
on
and
off
peripherals
such
as
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
configuration
control.
ACPI
leverages
the
Plug
and
Play
BIOS
data
structures
while
providing
a
processor
architecture-independent
implementation
that
is
compatible
with
Windows
2012/R2
and
Windows
2016
operating
systems.
1.6
Super
I/O
The
ASpeed
AST2500
Super
I/O
provides
one
high-speed,
16550
compatible
Universal
Asynchronous
Receiver/Transmitter
(UART),
which
support
serial
infrared
communications.
This
UART
includes
a
send/receive
FIFO,
a
programmable
baud
rate
generator,
complete
modem
control
capability
and
a
processor
interrupt
system.
This
UART
provides
legacy
speed
with
baud
rate
of
up
to
115.2
Kbps
as
well
as
an
advanced
speed
with
baud
rates
of
250
K,
500
K,
or
1
Mb/s,
which
support
higher
speed
modems.
The
Super
I/O
provides
functions
that
comply
with
ACPI
(Advanced
Configuration
and
Power
Interface),
which
includes
support
of
legacy
and
ACPI
power
management
through
the
System
Management
Interrupt
(SMI)
or
System
Control
Interrupt
(SCI).
It
also
features
auto
power
management
to
reduce
power
consumption.
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