17
Board Layout
Chapter 3
Embedded and Industrial Computing
The LEK-IOA4 board
DC_IN CONNECTOR (CN1): A Phoenix connector for
external power supply.
RS-232 Serial Port (COM3 and COM4) without
hardware auto flow control
: It is a RS-232/422/485 port
through the D-SUB9 connector.
Dual USB Port Connector #0 and #1 (USB1)
:
Pin No.
Pin Name
1
dC_GNd
2
dC_IN
2 1
6 7 8 9
1 2 3 4 5
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
signal Ground
6
dsR
7
RTs
8
CTs
9
RI
1 2 3 4
5 6 7 8
Pin No.
Pin Name
1
UsB power
2
UsB2_dAT-
3
U
4
signal Ground
5
UsB Power
6
UsB3_dAT-
7
U
8
signal Ground