Interfaces and Connectors
EPM-5 Reference Manual
29
J8 Utility Connector
The J8 50-pin utility connector incorporates the COM ports, USB ports, LEDs, speaker, and the
reset button. Table 6 illustrates the function of each pin and the pinout assignments to connectors
on the CBL/CBR-5010 breakout board.
Table 6: J8 Utility Connector Pinout
J8
Pin
External
Connector
Pin
Signal
J8
Pin
External
Connector
Pin
Signal
1
COM1
1
Data Carrier Detect
27
USB1
TM4 Ground
2
J3
6
Data Set Ready
28
J4
TM1 +5V
(Protected)
3
2
Receive Data
29
TM3
Channel 1 Data +
4
7
Request to Send
30
TM2
Channel 1 Data -
5 3
Transmit
Data
31
USB2
BM4 Ground
6
8
Clear to Send
32
J4
BM1 +5V
(Protected)
7
4
Data Terminal Ready
33
BM3
Channel 2 Data +
8
9
Ring Indicator
34
BM2
Channel 2 Data -
9 5
Ground
35
USB3
B4 Ground
10
– Ground
36
J4
B1 +5V
(Protected)
COM3
RS-422
RS-485
37
B3
Channel 3 Data +
11
J6
5
TxD+
(note)
38
B2
Channel 3 Data -
12
4 TxD–
(note)
39
ACPI Push-
3 Ground
13 1
Ground
Ground
40
button J2
4 EIRQ1
14 3
RxD+
TxD/RxD+ 41
– reserved
15 2
RxD–
TxD/RxD–
42
– reserved
16
– Ground Ground 43
PROG LED
1 +5V
(Protected)
RS-422 RS-485
44
D1
3 Programmable
LED
17
COM4
J5
5 TxD+
(note)
45
IDE LED
2 +5V
(Protected)
18
4 TxD–
(note)
46
D1
4 IDE
LED
19 1
Ground
Ground
47
Speaker
– +5V
(Protected)
20
3 RxD+
TxD/RxD+
48
S1
SP1 Speaker
Drive
21
2 RxD– TxD/RxD–
49
PBRESET
1 Ground
22
– Ground Ground 50
J2
2 Pushbutton
Reset
23
USB0
T4 Ground
24
J4
T1 +5V
(Protected)
25
T3
Channel 0 Data +
26
T2
Channel 0 Data -
Note: Do not connect to these pins in RS-485 mode.
