Chapter 3, Board layout, Jumper settings – Lanner LVC-5770 User Manual
Page 20: Sct4, Sct1 sct3

20
Board Layout
Chapter 3
Embedded and Industrial Computing
SCT2, SCT4: Select COM1 Protocol Setting
RS-232
RS-422
RS-485
Switch
Protocol
SCT2
SCT4
RS-232 (default)
1-2
1-5, 2-6, 3-7, 4-8
(default)
RS-422
3-4
5-9, 6-10, 7-11, 8-12
RS-485
5-6
5-9, 6-10, 7-11, 8-12
SCT1, SCT3: Select COM2 Protocol Setting
Jumper Settings
Line-out Audio Jack (Audio, AUDIO1): a D-sub 9 male
connector for HD Audio
Note: The driver for the VGA and Audio ports
should be installed with the following order:
Chipset INF->Graphic->Audio
COM1 RS-232 Serial Port (COM1): a RS-232/422/485 port
through the D-SUB9 connector.
RS-232/422/485 Serial Port(COM2): a RS-232/422/485
port through the D-SUB9 connector.
6 7 8 9
1 2 3 4 5
LEK-IOA7 Board
Pin No.
Pin Name
RS-232
RS-422
RS-485
1
DCD
TXD-
DATA-
2
RXD
TXD+
DATA+
3
TXD
RXD+
4
DTR
RXD-
5
GND
6
DSR
7
RTS
8
CTS
9
RI
Pin No.
Pin Name
RS-232
RS-422
RS-485
1
DCD
TXD-
DATA-
2
RXD
TXD+
DATA+
3
TXD
RXD+
4
DTR
RXD-
5
GND
6
DSR
7
RTS
8
CTS
9
RI
SCT2
SCT4
9
5
1
12
8
4
9
5
1
12
8
4
9
5
1
12
8
4
9
5
1
12
8
4
SCT1
SCT3
6 7 8 9
1 2 3 4 5
Pin No.
Function
Pin No.
Function
1
AUDIO_IN_L
6
AUDIO_IN_R
2
N/A
7
N/A
3
FRONT_OUT_L
8
GND
4
FRONT_OUT_R
9
GND
5
N/A
10
1
2
5
6
1
2
5
6
1
2
5
6
1
2
5
6
12
8
4
9
5
1
1
2
5
6