24
Note:
Please make sure that the USB cable has the same pin assignment as indi-
cated above. A different pin assignment may cause damage or system
hang-up.
SIR1: Serial infrared port
The mainboard supports a Serial Infrared data port. Infrared ports allow the
wireless exchange of information between your computer and similarly
equipped devices such as printers, laptops, Personal Digital Assistants
(PDAs), and other computers.
Pin
Signal Name
Function
1
Not assigned
Not assigned
2 KEY
No
pin
3 +5V
IR
Power
4 GND
Ground
5
IRTX
IrDA serial output
6
IRRX
IrDA serial input
LSIR1: Serial infrared port
(for OEM customers only)
Pin
Signal Name
Function
1 VCC
IR
Power
2 Empty
No
pin
3
IRRX
IrDA serial input
4 GND
Ground
5
IRTX
IrDA serial output
SMI1: System Management Interrupt
This connector is for use with SMI hardware interrupt power management.
Pin
Signal Name
Function
1 -EXTSMI
Sleep
button
2 GND
Ground