Asus P4B-MX Motherboard DIY Troubleshooting Guide - Page 44

USB Header, Infrared Module Connector

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5. USB header (10-1 pin USB) If the USB ports on the rear panel are inadequate, a USB header is available for two additional USB ports. Connect a 2-port USB connector set to the USB header and mount the USB bracket to an open slot in the chassis. ® P4B-MX USB 1 5 6 10 1: USB Power 2: USBP2- 3: USBP2+ 4: GND 5: NC 6: USB Power 7: USBP3- 8: USBP3+ 9: GND P4B-MX USB Header Figure 2-29 USB Header 6. Infrared module connector (5-pin IR) This connector supports an optional wireless transmitting and receiving infrared module. This module mounts to a small opening on system chassis that support this feature. You must also configure the UART2 Use As parameter in BIOS to set UART2 for use with IR. See section "4.4.2 I/O Device Configuration" for details. Use the five pins as shown in Back View and connect a ribbon cable from the module to the motherboard SIR connector according to the pin definitions.. IR 1 ® P4B-MX P4B-MX Infrared Module Connector Figure 2-30 Infrared Module Connector +5V (NC) IRRX GND IRTX Front View Back View IRTX +5V GND (NC) IRRX 2-24 Chapter 2: Hardware information

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2-24
Chapter 2: Hardware information
Figure 2-29
USB Header
5.
USB header (10-1 pin USB)
If the USB ports on the rear panel are inadequate, a USB header is
available for two additional USB ports. Connect a 2-port USB connector
set to the USB header and mount the USB bracket to an open slot in the
chassis.
6.
Infrared module connector (5-pin IR)
This connector supports an optional wireless transmitting and receiving
infrared module. This module mounts to a small opening on system
chassis that support this feature. You must also configure the
UART2
Use As
parameter in BIOS to set UART2 for use with IR. See section
“4.4.2 I/O Device Configuration” for details.
Use the five pins as shown in Back View and connect a ribbon cable
from the module to the motherboard SIR connector according to the
pin definitions..
Figure 2-30
Infrared Module Connector
P4B-MX
Front View
Back View
+5V
IRTX
IRRX
(NC)
GND
+5V
IRRX
IRTX
(NC)
GND
IR
1
P4B-MX Infrared Module Connector
P4B-MX
USB
1
5
6
10
P4B-MX USB Header
1: USB Power
2: USBP2–
3: USBP2+
4: GND
5: NC
6: USB Power
7: USBP3–
8: USBP3+
9: GND