Aaeon ECM-5716 Series User Manual

Contents

Aaeon ECM-5716 Series User Manual Manual pdf 43 page image

User’s Manual30 ECM-5716 Series User’s Manual3.7.15 Serial Port 2 Connector (JCOM2)Signal PIN SignalDCD 1 2 RXDTXD 3 4 DTRGND 5 6 DSRRTS 7 8 CTSNRI 9 10 NC3.7.16 Signal Description – Serial Port 2 Connector in RS-232 Mode (JCOM2)TxD Serial output. This signal sends serial data to the communication link. The signal is set to amarking state on hardware reset when the transmitter is empty or when loop mode operationis initiated.RxD Serial input. This signal receives serial data from the communication link.DTR Data Terminal Ready. This signal indicates to the modem or data set that the on-board UARTis ready to establish a communication link.DSR Data Set Ready. This signal indicates that the modem or data set is ready to establish acommunication link.RTS Request To Send. This signal indicates to the modem or data set that the on-board UART isready to exchange data.CTS Clear To Send. This signal indicates that the modem or data set is ready to exchange data.DCD Data Carrier Detect. This signal indicates that the modem or data set has detected the datacarrier.RI Ring Indicator. This signal indicates that the modem has received a telephone ringing signal.3.7.17 Pin Header Serial Port 2 Connector in RS-422 Mode (JCOM2)Signal PIN SignalTX- 1 2 RX+TX+ 3 4 RX-GND 5 6 NCNC 7 8 NCNC 9 10 NC3.7.18 Signal Description – Serial Port 2 in RS-422 Mode (JCOM2)Tx +/- Serial output. This differential signal pair sends serial data to the communication link. Data istransferred from Serial Port 2 Transmit Buffer Register to the communication link, if the RTSregister of the Serial Port 2 is set to LOW.Rx +/- Serial input. This differential signal pair receives serial data from the communication link.Received data is available in Serial Port 2 Receiver Buffer Register.