Datasheet

1-12
X7DBi+ User's Manual
Wake-On-LAN (WOL)
Wake-On-LAN is defi ned as the ability of a management application to remotely
power up a computer that is powered off. Remote PC setup, up-dates and asset
tracking can occur after hours and on weekends so that daily LAN traffi c is kept
to a minimum and users are not interrupted. The motherboard has a 3-pin header
(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 genera-
tor, 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