Utility connector (j7) – Lynx EPM-4 User Manual
Page 37
Utility Connector (J7)
EPM-4 Reference Manual
Reference – 29
Utility Connector (J7)
The 50-pin utility connector (J7) incorporates the COM ports, keyboard and mouse, general-
purpose inputs, and the reset button and speaker. Table 5 shows the function of each pin and the
pinout to the connectors of the CBL/CBR-5009 I/O board.
Table 5: Utility Connector Pinout
J7
Pin
CBR-5009
Connector
Pin
Signal
J7
Pin
CBR-5009
Connector
Pin
Signal
1
COM1
1
Data Carrier Detect
COM4
RS-422 RS-485
2
J3
6
Data Set Ready
26
J5
1 Ground Ground
3 (Top) 2
Receive
Data
27 5
TxD+ (1)
4
7
Request to Send
28 4
TxD– (1)
5 3
Transmit
Data
29
– Ground Ground
6
8
Clear to Send
30 2
RxD–
TxD/RxD–
7
4
Data Terminal Ready
31 3
RxD+
TxD/RxD+
8 9
Ring
Indicator
32
– Ground Ground
9 5
Ground
33
Mouse
T4 +5V
(Protected)
10
COM2
10
Data Carrier Detect
34
J4
T1 Mouse
Data
11
J3
15
Data Set Ready
35 T3
Ground
12 (Bottom) 11
Receive
Data
36 T5
Mouse
Clock
13
16
Request to Send
37
PBRESET (2)
1 Pushbutton
Reset
14 12
Transmit
Data
38
S1
2 Ground
15
17
Clear to Send
39
GP Timer
3 Ground
16
13
Data Terminal Ready
40
Inputs
4
GP Timer Input 1
17 18
Ring
Indicator
41
J2
– Ground
18 14
Ground
42
5
GP Timer Input 0
COM3
RS-422
RS-485
43
Keyboard
B4 +5V
(Protected)
19
J6
1 Ground
Ground
44
J4
B1 Keyboard
Data
20 5
TxD+
(1)
45 B3
Ground
21
4 TxD–
(1)
46 B5
Keyboard
Clock
22
– Ground
Ground
47 PLED (3)
1 +5V
(Protected)
23
2 RxD– TxD/RxD–
48
D1
3 Programmable
LED
24
3 RxD+ TxD/RxD+
49 Speaker
– +5V
(Protected)
25
– Ground Ground
50
SP1
SP1+ Speaker
Drive
(1) Do not connect to these pins in RS-485 mode.
(2) The Pushbutton Reset signal (PBRST#) is also routed to pin 2 of J2 (CBL/CBR-5009). A
pushbutton can be attached to pins 2 and 1 (Ground) of J2.
(3) Pin 2 of D1 (CBL/CBR-5009) is connected to +5V (Protected), which provides power to the IDE
LED. Pin 4 of D1 is connected to Ground.