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Pin #
1
Not Connected
2
COM2_RX
3
COM2_TX
4
Not Connected
5
GND
6
Not Connected
7
COM2_RTS#
8
COM2_CTS#
9
Not Connected
NOTE: Shaded table cell denotes ground. The # symbol indicates the signal is Active Low.
3.14.2
COM1 and COM3 (CN34)
Table 3-20 and Table 3-21 list the pin signals of the Serial B, 2-wire RS232 interface (COM1 and
COM3), which provides standard dual DB9 connectors.
Pin #
1
Not Connected
2
COM1_RX
3
COM1_TX
4
Not Connected
5
GND
6
Not Connected
7
Not Connected
8
Not Connected
9
Not Connected
NOTE: Shaded table cell denotes ground.
Pin #
1
Not Connected
2
COM3_RX
3
COM3_TX
4
Not Connected
5
GND
6
Not Connected
7
Not Connected
8
Not Connected
9
Not Connected
NOTE: Shaded table cell denotes ground.
30
Table 3-19: COM2 Signals (CN33)
Signal
Table 3-20: COM1 Signals (CN34)
Signal
Table 3-21: COM3 Signals (CN34)
Signal
Interfaces
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