Elitegroup ST945GM (V1.0) - Manual (Page 27)

21
Installing the Motherboard
USB1: Front Panel USB headers
The motherboard has four USB ports installed on the rear edge I/O port array. Additionally,
some computer cases have USB ports at the front of the case. If you have this kind of case,
use auxiliary USB connector to connect the front-mounted ports to the motherboard.
1 VCC +5V
2 VCC +5V
3 USB0- USB Port 0 Negative Signal
4 USB1- USB Port 1 Negative Signal
5 USB0+ USB Port 0 Positive Signal
6 USB1+ USB Port 1 Positive Signal
7 GND Ground
8 GND Ground
9 Key No pin
10 GND Ground
Pin Signal Name Function
Please make sure that the USB cable has the same pin assignment as
indicated above. A different pin assignment may cause damage or system
hang-up.
COM3/4: Onboard serial port connector
Connect a serial port extension bracket to this header to add a second serial port to your
system.
This Digital I/O header supports 3 Channels IN and 5 Channels OUT.
DIO1: Digital I/O header
3 DO1
Pin Signal Name Pin Signal Name
1 DO0
5 DO2
7 DO3
9 DO4
8 GND
10 GND
6 DI2
4 DI1
2 DI0
1 NDCDC/NDCDD Data Carrier Detect
2 NSINC/NSIND Serial Input
3 NSOUTC/NSOUTD UART B Serial Output
4 NDTRC/NDTRD UART B Data Terminal Ready
5 Ground Ground
6 NDSRC/NDSRD Data Set Ready
7 NRTSC/NRTSD RART B Request to Send
8 NCTSC/NCTSD Clear to Send
9 XNRI3/XNRI4 Ring Indicator
10 Key No pin
Pin Signal Name Function