ECS IC890GXM-A, Manual, Page: 23 / 78

19
Installing the Motherboard
COM: Onboard serial port header
Connect a serial port extension bracket to this header to add a second serial port to
your system.
1
DCDB Data Carrier Detect
2
SINB Serial Input
3
SOUTB UART B Serial Output
4
DTRB UART B Data Terminal Ready
5
GND Ground
6
DSRB Data Set Ready
7
RTSB RART B Request to Send
8
CTSB Clear to Send
9
RI Ring Indicator
10
Key No pin
Pin Signal Name Function
IPS_LED: Intelligent Power Saving
IPS is an advanced power system that provides better energy efficiency for the
processors. The energy canbe greatly saved during idle operation or other low load
conditions which can be confirmed through IPS indicator LEDs.
Red: FULL LOAD
Yellow: NORMAL LOAD
Green: LOW LOAD