Interfaces and Connectors
EBX-11 Reference manual
32
S
ERIAL
P
ORT
C
ONNECTORS
See the
Connector Location Diagrams
on pages 16 for connector and cable information. The
pinouts of the DB9M connectors apply to the serial connectors on the VersaLogic breakout board
CBR-5009.
These connectors use IEC 61000-4-2-rated TVS components to help protect against ESD
damage.
Table 9: COM1-2 Pinout
– CBR-5009 Connector J3
COM1
COM2
Top DB9
J3 Pin
Bottom DB9
J3 Pin
RS-232
1
10
DCD
2
11
RXD*
3
12
TXD*
4
13
DTR
5
14
Ground
6
15
DSR
7
16
RTS
8
17
CTS
9
18
RI
Note:
On Rev. 4 boards, the COM3 and COM4 connectors have a nonstandard pinout.
The RxD+ and RxD- signals are transposed, as shown in Table 11. The standard
pinout is used on Rev. 5 boards, as shown in Table 10.
Table 10: COM3-4 Pinout
– CBR-5009 Connectors J5-6 – Rev. 5 Boards
COM3
COM4
J6 Pin
J5 Pin
RS-232
RS-422
1
1
Ground
Ground
2
2
RXD
RxD-
3
3
CTS
RxD+
4
4
TXD
TxD-
5
5
RTS
TxD+
Table 11: COM3-4 Pinout
– CBR-5009 Connectors J5-6 – Rev. 4 Boards
COM3
COM4
J6 Pin
J5 Pin
RS-232
RS-422
1
1
Ground
Ground
2
2
CTS
RxD+
3
3
RXD
RxD-
4
4
TXD
TxD-
5
5
RTS
TxD+
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