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34 ASUS P3B-F User’s Manual
3. HARDWARE SETUP
Connectors
3. H/W SETUP
10) IrDA-Compliant Infrared Module Connector (5-pin IR)
This connector supports the optional wireless transmitting and receiving infrared
module. This module mounts to a small opening on system cases that support this
feature. You must also configure the setting through UART2 Use Infrared in
4.4.2 I/O Device Configuration to select whether UART2 is directed for use with
COM2 or IrDA. Use the five pins as shown on the Back View and connect a
ribbon cable from the module to the motherboard according to the pin definitions.
Front View
+5V
IRTX
IRRX
(NC)
GND
Back View
P3B-F Infrared Module Connector
For the infrared feature to be available,
you must connect the optional Infrared
(IrDA) module to the motherboard.
+5V
GND
IRTX
(NC)
IRRX
R
P3B-F
11) SMBus Connector (5-1 pin SMB)
This connector allows you to connect SMBus devices. SMBus devices commu-
nicate by means of the SMBus with an SMBus host and/or other SMBus de-
vices. The SMBus or System Management Bus is a specific implementation of
an I
2
C bus, which is a multi-master bus, that is, multiple chips can be connected
to the same bus and each one can act as a master by initiating data transfer.
R
P3B-F
P3B-F SMBus Connector
SMBCLK
Ground
SMBDATA
+5V
1
SMB