ECS A750GM-M, Manual, Page: 23 / 74

19
Installing the Motherboard
SPDIFO: SPDIF out header
This is an optional header that provides an S/PDIF (Sony/Philips Digital Interface)
output to digital multimedia device through optical fiber or coaxial connector.
2
+5VA 5V analog Power
3
Key No pin
4
GND Ground
1
SPDIF SPDIF digital output
Pin Signal Name Function
CASE: Chassis intrusion detect header
This detects if the chassis cover has been removed. This function needs a chassis
equipped with instrusion detection switch and needs to be enabled in BIOS.
Pin 1-2 Function
Short
Chassis cover is removed
Open
Chassis cover is closed
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