System Startup
5.3.3
Serial Port Connector Pin Arrangements and I/O Circuits
5-22
Note: For the port 2 interface, the terminating resistance activated by con-
necting 2 to 11 and 4 to 7.
TX
/
RX TX
/
RXTX
/
RX
1
TX
(
+
)
2
TX
(
-
)
11
TXR
3
RX
(
+
)
4
RX
(
-
)
7
RXR
14
GND
MP940 PORT2
FG
①
②
TX
(
-
)
TX
(
+
)
RX
(
-
)
RX
(
+
)
9843
①
②
GND GND GND
TX
(
-
)
TX
(
+
)
21
RX
(
-
)
RX
(
+
)
610
Connector
shell
Connector
shell
Connector
shell
Shield
120-Ω
terminating
resistance
An example when the
MP940 Module is
connected in the mid-
dle of the connection
is shown below.
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