Utility Connector (J7) - VersaLogic EPM-4 Reference Manual

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.
J7 CBR-5009
Pin Connector
1
COM1
2 J3
3 (Top)
4
5
6
7
8
9
10 COM2
11 J3
12 (Bottom)
13
14
15
16
17
18
COM3
19
J6
20
21
22
23
24
25
(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.
EPM-4 Reference Manual
Table 5: Utility Connector Pinout
Pin Signal
1 Data Carrier Detect
6 Data Set Ready
2 Receive Data
7 Request to Send
3 Transmit Data
8 Clear to Send
4 Data Terminal Ready
9 Ring Indicator
5 Ground
10 Data Carrier Detect
15 Data Set Ready
11 Receive Data
16 Request to Send
12 Transmit Data
17 Clear to Send
13 Data Terminal Ready
18 Ring Indicator
14 Ground
RS-422 RS-485
1 Ground Ground
5 TxD+ (1)
4 TxD– (1)
– Ground Ground
2 RxD– TxD/RxD–
3 RxD+ TxD/RxD+
– Ground Ground
J7 CBR-5009
Pin Connector Pin
COM4
26 J5 1
27 5
28 4
29 –
30 2
31 3
32 –
33 Mouse T4
34 J4 T1
35 T3
36 T5
37 1
PBRESET (2)
38 2
S1
39 GP Timer 3
40 Inputs 4
41 J2 –
42 5
43 B4
Keyboard
44 B1
J4
45 B3
46 B5
47 1
PLED (3)
48 3
D1
49 –
Speaker
50 SP1+
SP1
Utility Connector (J7)
Signal
RS-422 RS-485
Ground Ground
TxD+ (1)
TxD– (1)
Ground Ground
RxD– TxD/RxD–
RxD+ TxD/RxD+
Ground Ground
+5V (Protected)
Mouse Data
Ground
Mouse Clock
Pushbutton Reset
Ground
Ground
GP Timer Input 1
Ground
GP Timer Input 0
+5V (Protected)
Keyboard Data
Ground
Keyboard Clock
+5V (Protected)
Programmable LED
+5V (Protected)
Speaker Drive
Reference – 29