EBX-11 Reference Manual
26
Interfaces and Connectors
Utility I/O Connectors
A number of interfaces on the EBX-11 are grouped together and made accessible through utility
I/O connectors J4, J5, and J10. A number of cables and boards are available from VersaLogic
that provide discrete connectors for each of the interfaces; however, you may wish to create
custom cables that surface only the interfaces required by your application.
J4
I/O
C
ONNECTOR
The 50-pin I/O connector (J4) incorporates the COM ports, keyboard and mouse, and the reset
button and speaker interfaces. Table 4 illustrates the function of each pin.
Note:
On Rev. 4 boards, the COM3 and COM4 connectors have a nonstandard pinout.
The RxD+ and RxD- signals are transposed. The standard pinout is shown below.
The nonstandard pinout is shown in Table 11.
Table 4: J4 I/O Connector Pinout
– Rev. 5.00 and Later Boards
J4
Pin
CBR-5009B
Connector
Pin
Signal
J4
Pin
CBR-5009B
Connector
Pin
Signal
1
COM1
1
Data Carrier Detect
COM4
RS-232
RS-422
2
J3
6
Data Set Ready
26
J5
1
Ground
485 GND
Ground
3
Top DB9
2
Receive Data
27
5
RTS
TxD+
4
7
Request to Send
28
4
TXD
TxD-
5
3
Transmit Data
29
–
Ground
485 GND
Ground
6
8
Clear to Send
30
2
RXD
RxD-
7
4
Data Terminal Ready
31
3
CTS
RxD+
8
9
Ring Indicator
32
–
Ground
Ground
9
5
Ground
33
Mouse
4
+5V (Protected)
10
COM2
1
Data Carrier Detect
34
J4
1
Mouse Data
11
J3
6
Data Set Ready
35
Top
3
Ground
12
Bottom DB9
2
Receive Data
36
5
Mouse Clock
13
7
Request to Send
37
PBRESET
1
Pushbutton Reset
14
3
Transmit Data
38
S1
2
Ground
15
8
Clear to Send
39
(Reserved)
1
Ground
16
4
Data Terminal Ready
40
2
Not connected
17
9
Ring Indicator
41
3
Ground
18
5
Ground
42
4
Not connected
COM3
RS-232
RS-485
RS-422
43
Keyboard
4
+5V (Protected)
19
J6
1
Ground
485 GND
Ground
44
J4
1
Keyboard Data
20
5
RTS
TxD+
45
Bottom
3
Ground
21
4
TXD
TxD-
46
5
Keyboard Clock
22
–
Ground
485 GND
Ground
47
PLED
1
+5V (Protected)
23
2
RXD
RxD-
48
D1
2
Programmable LED
24
3
CTS
RxD+
49
Speaker
1
+5V (Protected)
25
–
Ground
Ground
50
SP1
2
Speaker Drive
5
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