Table of Contents
Advertisement
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 Server 2019 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. In areas
where noisy power transmission is present, you may choose to install a line filter 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.
1.7 Super I/O
The Super I/O (Aspeed AST2500 chip) includes a data separator, write pre-compensation
circuitry, decode logic, data rate selection, a clock generator, drive interface control logic and
interrupt and DMA logic. The wide range of functions integrated onto the Super I/O greatly
reduces the number of components required for interfacing with floppy disk drives.
The Super I/O provides one high-speed, 16550 compatible serial communication port
(UART), which supports serial infrared communication. This UART includes a 16-byte 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 a SMI
or SCI function pin. It also features auto power management to reduce power consumption.
The IRQs, DMAs and I/O space resources of the Super I/O can be flexibly adjusted to meet
ISA PnP requirements, which support ACPI and APM (Advanced Power Management).
19
Chapter 1: Introduction
Advertisement
Table of Contents
