Dual Serial Port Modes
The serial port connectors can be configured as dual serial ports in the BIOS. The mapping between the connectors and COM port numbers is shown in Table 22. The supported combinations of serial port modes are listed in Table 23, which also includes a reference to the corresponding connector pinout. For the configurations that have
Table 22 Dual Serial Port Connections
Connector | COM A | COM B |
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CN7 | COM 1 | COM 3 |
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CN8 | COM 2 | COM 4 |
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Table 23 Dual Serial Port Modes
COM A | COM B | Pinout | JP12/JP14 |
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| Reference |
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Table 24 | Not Installed | ||
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Table 25 | Not Installed | ||
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Table 26 | CN7: JP12 | ||
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| CN8: JP14 |
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Table 25 | Not Installed | ||
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Table 26 | CN7: JP12 | ||
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| CN8: JP14 |
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Table 24 COM A (RS-232) and COM B(RS-232)
Pin | Signal | Function | In/Out | |
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1 | DCD1 | COM A- Data Carrier Detect | in | 1 |
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2 | RXD2 | COM B- Receive Data | in | 6 |
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3 | RXD1 | COM A - Receive Data | in | 2 |
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4 | RTS1 | COM A - Request To Send | out | 7 |
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5 | TXD1 | COM A - Transmit Data | out | 3 |
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6 | CTS1 | COM A - Clear To Send | in | 8 |
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7 | TXD2 | COM B - Transmit Data | out | 4 |
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8 | RI1 | COM A - Ring Indicate | in | 9 |
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9,10 | GND | Signal Ground | — | 5 |
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40 CMX158886 cpuModule |
