System information

Interfaces and Connectors
EPM-15 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 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.