CME34M Hardware Manual - RTD Embedded Technologies, Inc.
CME34M Hardware Manual - RTD Embedded Technologies, Inc.
CME34M Hardware Manual - RTD Embedded Technologies, Inc.
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Dual Serial Port Modes<br />
The serial port connectors can be configured as dual serial ports in the BIOS. The mapping between the<br />
connectors and COM port numbers is shown in Table 18. The supported combinations of serial port modes are<br />
listed in Table 19, which also includes a reference to the corresponding connector pinout.<br />
Table 18<br />
Dual Serial Port Connections<br />
Connector COM A COM B<br />
CN7 COM 1 COM 3<br />
CN8 COM 2 COM 4<br />
Table 19<br />
Dual Serial Port Modes<br />
COM A COM B Pinout<br />
Reference<br />
RS-232 RS-232 Table 20<br />
RS-422 RS-232 Table 21<br />
RS-422 RS-422 Table 22<br />
RS-485 RS-232 Table 21<br />
RS-485 RS-485 Table 22<br />
Table 20<br />
COM A (RS-232) and COM B(RS-232)<br />
Pin Signal Function In/Out DB-9<br />
1 DCD1 COM A- Data Carrier Detect in 1<br />
2 RXD2 COM B- Receive Data in 6<br />
3 RXD1 COM A - Receive Data in 2<br />
4 RTS1 COM A - Request To Send out 7<br />
5 TXD1 COM A - Transmit Data out 3<br />
6 CTS1 COM A - Clear To Send in 8<br />
7 TXD2 COM B - Transmit Data out 4<br />
8 RI1 COM A - Ring Indicate in 9<br />
9,10 GND Signal Ground — 5<br />
BDM-610000076 Rev A Chapter 3: Connecting the cpuModule 35
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