Chapter 1: Introduction
1-13
1-5
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 SUPER P4SAA accommodates 12V ATX power supplies. Although
most power supplies generally meet the specifications required by the CPU,
some are inadequate. You power supply must supply 1 amp of 5V standby
voltage.
It is strongly recommended that you use a high quality power supply that
meets 12V ATX power supply Specification 1.1 or above. Additionally, in
areas where noisy power transmission is present, you may choose to in-
stall 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.
It also provides two high-speed, 16550 compatible serial communication
ports (UARTs), one of which supports serial infrared communication. Each
UART includes a 16-byte send/receive FIFO, a programmable baud rate
generator, complete modem control capability and a processor interrupt sys-
tem. Both UARTs provide 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 Con-
figuration 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 suppport ACPI and APM (Ad-
vanced Power Management).
