User Manual

ECW-281B/B2-D525 Embedded System
Page 26
PIN NO. DESCRIPTION PIN NO. DESCRIPTION
1 DATA CARRIER DETECT (DCD3) 2 DATA SET READY (DSR3)
3 RECEIVE DATA (RXD3) 4 REQUEST TO SEND (RTS3)
5 TRANSMIT DATA (TXD3) 6 CLEAR TO SEND (CTS3)
7 DATA TERMINAL READY (DTR3) 8 RING INDICATOR (RI3)
9 GND 10 GND
11 DATA CARRIER DETECT (DCD4) 12 DATA SET READY (DSR4)
13 RECEIVE DATA (RXD4) 14 REQUEST TO SEND (RTS4)
15 TRANSMIT DATA (TXD4) 16 CLEAR TO SEND (CTS4)
17 DATA TERMINAL READY (DTR4) 18 RING INDICATOR (RI4)
19 GND 20 GND
21 DATA CARRIER DETECT (DCD5) 22 DATA SET READY (DSR5)
23 RECEIVE DATA (RXD5) 24 REQUEST TO SEND (RTS5)
25 TRANSMIT DATA (TXD5) 26 CLEAR TO SEND (CTS5)
27 DATA TERMINAL READY (DTR5) 28 RING INDICATOR (RI5)
29 GND 30 GND
31 DATA CARRIER DETECT (DCD6 32 DATA SET READY (DSR6)
33 RECEIVE DATA (RXD6) 34 REQUEST TO SEND (RTS6)
35 TRANSMIT DATA (TXD6 36 CLEAR TO SEND (CTS6)
37 DATA TERMINAL READY (DTR6 38 RING INDICATOR (RI6)
39 GND 40 GND
Table 3-10: COM3 to COM6 Connector Pinouts
3.3.10 Serial Port Connector (COM 2)(RS-232, RS-422 or RS-485)
CN Label:
COM2
CN Type:
14-pin header (2x7)
CN Location:
See
755Figure 3-11
CN Pinouts:
See
755Table 3-11
The 14-pin serial port connector connects to the COM2 serial communications channels.
COM2 is a multi function channel. In default mode COM2 is an RS-232 serial