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| User’s Manual | |
2.4.15.1 Signal Description – Serial Port 1, 3, 4 Connector (CN6) | ||||
| Signal |
| Signal Description |
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| Serial output. This signal sends serial data to the communication link. The signal is |
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| TxD |
| set to a marking state on hardware reset when the transmitter is empty or when |
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| loop mode operation is initiated. |
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| RxD | Serial input. This signal receives serial data from the communication link. |
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| DTR |
| Data Terminal Ready. This signal indicates to the modem or data set that the |
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| DSR |
| Data Set Ready. This signal indicates that the modem or data set is ready to |
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| establish a communication link. |
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| RTS |
| Request To Send. This signal indicates to the modem or data set that the |
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| UART is ready to exchange data. |
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| CTS |
| Clear To Send. This signal indicates that the modem or data set is ready to |
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| exchange data. |
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| DCD |
| Data Carrier Detect. This signal indicates that the modem or data set has detected |
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| the data carrier. |
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| RI |
| Ring Indicator. This signal indicates that the modem has received a telephone |
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| ringing signal. |
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