INSTALLATIONS
TL-EMBSBC 795 User’s Manual
15
J2, JB2, JC2, JD2: Serial Ports
J2 (COM1), JB2 (COM2), JC2 (COM3) and JD2 (COM4) are the
onboard serial ports on the TL-EMBSBC 795.
Pin #
Signal Name (RS-232)
1
DCD, Data carrier detect
2
RXD, Receive data
3
TXD, Transmit data
4
DTR, Data terminal ready
5
Ground
6
DSR, Data set ready
7
RTS, Request to send
8
CTS, Clear to send
9
RI, Ring indicator
10
No Connect.
JB2 (COM2) is jumper selectable for RS-232, RS-422 and RS-485.
Pin #
Signal Name
RS-232
R2-422
RS-485
1
DCD
TX-
DATA-
2
RX
TX+
DATA+
3
TX
RX+
NC
4
DTR
RX-
NC
5
Ground
Ground
Ground
6
DSR
RTS-
NC
7
RTS
RTS+
NC
8
CTS
CTS+
NC
9
RI
CTS-
NC
10
NC
NC
NC
Содержание TL-EMBSBC 795
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