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3.5 Serial Posts (Com1,CN4)
The WAFER-C400EV offers two high speed NS-16C-550 compatible UARTS with
Read/Receive 16 byte FIFO serial ports, and supports RS-422/485 mode from
CN4 Pin11~14 by setting J4 connector. These ports let you connect to serial
devices or a communication network. The J3 header also provides a 1A-fuesd
+5V or +12V power out from CN4 pin 8. One 9-pin D-SUB connector and one
14-pin header are also provided. The detailed pin assignment of the connectors
is specified as following tables:
COM1: Serial Port1 Connector (9-pin D-SUB)
PIN DESCRIPTION
PIN DESCRIPTION
1 DCD
2 RX
3 TX
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
CN4: Serial Port2 Connector (14-pin 2.0mm Header)
PIN DESCRIPTION
PIN DESCRIPTION
1 DCD
2 DSR
3 RX
4 RTS
5 TX
6 CTS
7 DTR
8 RI
9 GND
10 N/C
11 TX+
12 TX-
13 RX+
14 RX-
J3: Com1 Pin 9 selector (2X3-pin 2.0mm Header)
PIN DESCRIPTION
PIN DESCRIPTION
1
VCC
2
RI (To I/O Buffer)
3
Connect to J3 Pin6
4
RI (To Com1)
5
+12V
6
Connect to J3 Pin9
Applications:
For normal operation, connect Pin2-4
For VCC supply from CN4 Pin8, connect Pin1-3 and Pin4-6
For +12V supply from CN4 Pin8, connect Pin3-5 and Pin4-6
J4: RS-232/RS-422/485 Selector (3-pin 2.0mm Header)
Pin 1-2 RS-232
Pin 2-3 RS-422/RS-485
