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A300 Motherboard
5 TX1 6 CTS1
7 DTR1 8 RI1
9 GND 10 GND
Table 4-26: RS-232 Serial Port (COM 1) Pinouts
Figure 4-25: Serial Port Pinout Locations
4.3.7 Serial Port Connectors (COM 2 and COM3)
CN Label: J5
CN Type:
DB-9 connector
CN Location: See
Figure 4-20
CN Pinouts: See Table 4-27 and Figure 4-25
The 9-pin DB-9 COM 2 and COM3 serial port connectors are connected to RS-232 serial
communications devices.
PIN NO. DESCRIPTION PIN NO. DESCRIPTION
1 DCD3 2 DSR3
3 RX3 4 RTS3
5 TX3 6 CTS3
7 DTR3 8 RI3
9 GND 10 GND
Table 4-27: RS-232 Serial Port (COM2, COM3) Pinouts
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