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Lynx EPM-4 Manuel d'utilisateur Page 37

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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.
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