5.USB header (10-1 pin USB23)

If the USB port connectors on the rear panel are inadequate, a USB header is available for two additional USB port connectors. Connect a 2-port USB connector set to the USB header and mount the USB bracket to an open slot in the chassis.

 

USB23

 

1

5

 

6

10

P4B-M

1: USB Power

6: USB Power

 

 

2: USBP2–

7: USBP3–

 

3: USBP2+

8: USBP3+

 

4: GND

9: GND

 

5: NC

 

P4B-M USB Header

Figure 2-33

USB Header

6.Infrared module connector (two 5-1 pin IR_CON)

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 configureUART2the

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..

P4B-M

Standard Infrared (SIR)

Front View Back View

IRTX KBPWR

GND CIRRX

IRRX

GND

KBPWR CIRTX

1

IRTX

+5V

SIR CIR

GND

(NC)

 

IRRX

P4B-M Infrared Module Connector

Figure 2-34 Infrared Module Connector

ASUS P4B-M motherboard user guide

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