Fujitsu D1271, Technical Manual

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38 D1271 / D1291 CUV-LSV / CUV-LV User’s Manual
3. HARDWARE SETUP
Connectors
3. H/W SETUP
11) Power Supply Connector (20-pin block ATXPWR)
This connector connects to an ATX 12V power supply. The plugs from the power
supply fits in only one orientation because of the different hole sizes. Find the
proper orientation and push down firmly making sure that the pins are aligned.
IMPORTANT:
Make sure that the ATX 12V power supply (minimum
recommended wattage: 230W) can supply at least 100mA on the +5-volt standby
lead (+5VSB). The system may become unstable and may experience difficulty
powering up if the power supply is inadequate. For Wake-On-LAN support, the
ATX power supply must supply at least 720mA +5VSB.
12) SMBus Connectors (5-1 pin SMB, BP_SMB)
These connectors allow you to connect SMBus (System Management Bus)
devices. SMBus devices communicate by means of the SMBus with an SMBus
host and/or other SMBus devices. SMBus is a specific implementation of an I
2
C
bus, which is a multi-device bus. This means that multiple chips can be connected
to the same bus and each one can act as a master by initiating data transfer.
CUV-LSV ATX Power Connector
+3.3 V
o
lts
-12.0 V
o
lts
Ground
Power Supply On
Ground Ground Ground
-5.0 V
o
lts
+5.0 V
o
lts
+5.0 V
o
lts
Power Good +12.0 V
o
lts
+3.3 V
o
lts
+3.3 V
o
lts
Ground +5.0 V
o
lts
Ground +5.0 V
o
lts
Ground +5V Standby
CUV-LSV
CUV-LSV SMBus Connectors
BP_SMB
SMBCLK
Ground
SMBDA
T
A
+5V
1
SMBCLK
Ground
SMBDA
T
A
+5V
1
SMB
CUV-LSV