B&B Electronics WLNN-EK-DP551 - User Manual - Manual (Page 22)

B&B Electronics
22
Airborne Enterprise WLNN EVB Users Guide
Designator Pin Description
4 RxD
5 TxD
6 CN1 Pin 3
7 TxD-
8 TxD+
9 CN1 Pin 9
10 CN1 Pin 6
11 TxD-
12 RxD-
13 CN1 Pin 8
14 CTS
15 RTS
16 CN1 Pin 7
5.16 J3
This header correctly enables the primary UART transceivers for the interface
type selected by the configuration of J2. The available options are shown in
Table 19.
TABLE 19 - PRIMARY UART TRANSCEIVER CONFIGURATION
Designator Description Configuration
J3
RS232
RS422/485
Software Select
FIGURE 7 - PRIMARY UART TRANSCEIVER HEADER
TABLE 20 - PRIMARY UART TRANSCEIVER HEADER PIN-OUT
Designator Pin Description
J3
1 RS422/485 Rx Enable (Active Low)
2 RXEN
3 GND
4 RS232 Rx Enable (Active Low) with 10KΩ Pull-up
5 3.3VDC