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Chapter 3: Motherboard Connections
Front Panel Audio Header
A 10-pin front panel audio header located on the motherboard allows you to use the onboard
sound for audio playback. Connect an audio cable to the this header to use this feature. Refer
to the table below for pin definitions.
Audio Header
Pin Definitions
Pin#
Definition
Pin#
Definition
1
Microphone_Left
2
Audio_Ground
3
Microphone_Right
4
Audio_Detect
5
Line_2_Right
6
Ground
7
Jack_Detect
8
Key
9
Line_2_Left
10
Ground
COM Ports
There are four COM ports (JCOM1: COM1/COM2 supports two RS232/RS422/RS485 and
JCOM2: COM3/COM4 supports two RS232) on the motherboard. Refer to the table below
for pin definitions.
SATA Port
The X11SSN-H-WOHS/-E-WOHS/-L-WOHS has one SATA 3.0 port (I-SATA1).
Battery Connector
BT1 is a two-pin connector for an external CMOS battery. Refer to section 3.4 for battery
installation instructions. This connector is also used to clear the CMOS. To clear the CMOS,
remove the battery, short pins 1-2 for more than 10 seconds and then install the battery.
Serial COM Ports (JCOM2)
Pin Definitions
Pin#
Definition
Pin#
Definition
1
DCD3
2
DSR3
3
RXD3
4
RTS3
5
TXD3
6
CTS3
7
DTR3
8
RI3_N
9
GND
10
N/A
11
DCD4
12
DSR4
13
RXD4
14
RTS4
15
TXD4
16
CTS4
17
DTR4
18
RI4_N
19
GND
20
N/A
Serial COM Ports (JCOM1)
Pin Definitions
Pin#
Definition
Pin#
Definition
1
DCD1
or RS-485/422_COM1_TX- (Full Duplex)
or RS-485_COM1_Data- (Half Duplex)
2
DSR1
3
RXD1
or RS-485/422_ (Full Duplex)
or RS-485_CO (Half Duplex)
4
RTS1
5
TXD1 or RS-485/422_ (Full Duplex)
6
CTS1
7
DTR1 or RS-485/422_COM1_RX- (Full Duplex)
8
RI1_N
9
GND
10
N/A
11
DCD2
or RS-485/422_COM2_TX- (Full Duplex)
or RS-485_COM2_Data- (Half Duplex)
12
DSR2
13
RXD2
or RS-485/422_ (Full Duplex)
or RS-485_CO (Half Duplex)
14
RTS2
15
TXD2 or RS-485/422_ (Full Duplex)
16
CTS2
17
DTR2 or RS-485/422_COM2_RX- (Full Duplex)
18
RI_N2
19
GND
20
N/A