EITX
EITX
EITX
EITX-
--
-3002
3002
3002
3002 User Manual
User Manual
User Manual
User Manual
35
2.2.10.
COM Pin Headers
The EITX-3002 mainboard includes two onboard COM pin headers in addition
to COM ports on the external I/O. The onboard COM pin headers labeled as
“COM3” and “COM4” are used to attach additional COM ports that support
RS-232 standard. All COM pin headers can s5V or +12V. Refer to
their corresponding jumper settings for more information.
COM3
1
9
2
8
1
9
2
8
COM4
Figure
Figure
Figure
Figure 28
28
28
28: COM pin headers
: COM pin headers
: COM pin headers
: COM pin headers
COM
COM
COM
COM3
3
3
3
COM
COM
COM
COM4
4
4
4
Pin
Pin
Pin
Pin
Signal
Signal
Signal
Signal
Pin
Pin
Pin
Pin
Signal
Signal
Signal
Signal
Pin
Pin
Pin
Pin
Signal
Signal
Signal
Signal
Pin
Pin
Pin
Pin
Signal
Signal
Signal
Signal
1
DCD
2
RXD
1
DCD
2
RXD
3
TXD
4
DTR
3
TXD
4
DTR
5
GND
6
DSR
5
GND
6
DSR
7
RTS
8
CTS
7
RTS
8
CTS
9
RI/VCC
10
—
9
RI/VCC
10
—
Table
Table
Table
Table 18
18
18
18: COM pin
: COM pin
: COM pin
: COM pin header
header
header
headerssss pinout
pinout
pinout
pinout
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