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Chapter 3 Motherboard Connections
Front Accessible Audio Header
A 10-pin audio header located at AUDIO FP allows you to use the onboard sound for audio
playback. Connect an audio cable to this header to use this feature. Refer to the table below
for pin definitions.
COM Ports and Headers
The motherboard has two COM ports on the I/O back panel and three COM headers (COM1/2,
COM3/4, COM5/6) that provide five serial connections. COM1/2 support RS-232/422/485 by
default and COM3-6 support RS-232 only.
Chassis Intrusion
Pin Definitions
Pins
Definition
1
Intrusion Input
2
Ground
Chassis Intrusion
A Chassis Intrusion header is located at JL1 on the motherboard. Attach the appropriate cable
from the chassis to the header to inform you when the chassis is opened.
Audio Header
Pin Definitions
Pin#
Definition
Pin#
Definition
1
Mic_2_Left
2
Audio_Ground
3
Mic_2_Right
4
Audio_Detect
5
Line_2_Right
6
Mic_2_JD
7
Jack_Detect
8
Key
9
Line_2_Left
10
Line_2_JD
COM Header (COM1, COM2)
Pin Definitions
Pin#
Definition
Pin# Definition
1
DCD
6
DSR
2
RXD
7
RTS
3
TXD
8
CTS
4
DTR
9
RI
5
GrND
10
N/A
COM Header (COM3/4, COM5/6)
Pin Definitions
Pin#
Definition
Pin#
Definition
1
DCD4
2
DSR4
3
RXD4
4
RTS4
5
TXD4
6
CTS4
7
DTR4
8
RI4_N
9
GND
10
N/A
11
DCD3
12
DSR3
13
RXD3
14
RTS3
15
TXD3
16
CTS3
17
DTR3
18
RI3_N
19
GND
20
N/A