1-12
X7DBi+ User's Manual
(WOL) to connect to the 3-pin header on a Network Interface Card (NIC) that has
WOL capability. In addition, an onboard LAN controller can also support WOL
without any connection to the WOL header. The 3-pin WOL header is to be used
with a LAN add-on card only.
Note: Wake-On-LAN requires an ATX 2.01 (or above) compliant power supply.
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.
The X7DBi+ can only accommodate 24-pin ATX power supplies. Although most
power supplies generally meet the specifi cations required by the CPU, some are
inadequate. In addition, the 12V 4-pin and the 12V 8-pin power connections are also
required to ensure adequate power supply to the system. Also your power supply
must supply 1.5A for the Ethernet ports.
Note: The + 12V 8-pin CPU Power Connector (JPW3) is also required to support
Intel 64-bit CPUs. Failure to provide the extra power will result in CPU PWR Failure.
See Section 2-5 for details on connecting the power supply.
It is strongly recommended that you use a high quality power supply that meets ATX
power supply Specifi cation 2.02 or above. It must also be SSI compliant. (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 fi 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.
1-7 Super I/O
The disk drive adapter functions of the Super I/O chip include a fl oppy disk drive
controller that is compatible with industry standard 82077/765, 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 fl oppy disk drives. The Super I/O supports 360 K, 720 K, 1.2
M, 1.44 M or 2.88 M disk drives and data transfer rates of 250 Kb/s, 500 Kb/s or
1 Mb/s. It also provides two high-speed, 16550 compatible serial communication
ports (UARTs). Each UART includes a 16-byte send/receive FIFO, a programmable
baud rate generator, complete modem control capability and a processor interrupt
system. 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 sup-
port higher speed modems.
The Super I/O supports one PC-compatible printer port (SPP), Bidirectional Printer
Port (BPP), Enhanced Parallel Port (EPP) or Extended Capabilities Port (ECP).
