Interfaces and Connectors
Bengal (VL-EPMe-30) Reference Manual
26
Table 12 shows signal routing of the J18 User I/O connector to the VL-CBR-5015 paddleboard.
Table 12: User I/O Connector Signal Routing to VL-CBR-5015 Paddleboard
J18
Pin
CBR-5015
Connector
Signal
J18
Pin
CBR-5015
Connector
Signal
RS-232 RS-422/485
25
J5 Top
USB 1
USB1 +5.0 V
1
J3 Top
COM1
Ground
Ground
26
USB1 Data +
2
RXD1
RxD1-
27
USB1 Data -
3
CTS1
RxD1+
28
J5 Bottom
USB 2
USB2 +5.0V
4
Ground
Ground
29
USB2 Data +
5
TXD1
TxD1-
30
USB2 Data -
6
RTS1
TxD1+
31
J4 Top
USB 3
USB3 +5.0 V
7
J3 Bottom
COM2
Ground
Ground
32
USB3 Data +
8
RXD2
RxD2-
33
USB3 Data -
9
CTS2
RxD2+
34
J4 Bottom
USB 4
USB4 +5.0V
10
Ground
Ground
35
USB4 Data +
11
TXD2
TxD2-
36
USB4 Data -
12
RTS2
TxD2+
37
+5.0 V (Protected)
13
J2
2
Ground
38
D1
Programmable LED
14
1
AUX I
2
C Clock
39
SP1
Speaker
15
3
AUX I
2
C Data
40
S2, J2 Pin 11
Pushbutton Reset
16
4
Ground
41
S1, J2 Pin 13
Power Button
17
B1
Battery Input
42
J2 Pin 14
Ground
18
J2
5
GPIO2
43
J6
USB 5
USB5 +5.0 V
19
6
Ground
44
USB5 Data+
20
7
GPIO1
45
USB5 Data-
21
8
3.3 V Power for LEDs
46
Ground
22
12
Ground
47
USB5 +5.0 V
23
9
Ethernet 0 LED
48
Not
Functional
NC
24
10
Ethernet 1 LED
49
NC
50
Ground
Serial Ports
The Bengal features two on-board 16550-based serial communications channels located at
standard PC I/O addresses. The serial ports can be operated in RS-232 4-wire, RS-422, or RS-
485 modes. IRQ lines are chosen in the BIOS Setup utility. Each COM port can be independently
enabled, disabled, or assigned a different I/O base address in the BIOS Setup utility.
COM Port Configuration
Use the BIOS Setup utility to select between RS-232 and RS-422/485 operating modes.
Jumper block V1 configures the serial ports for RS-422/485 operation. See
details. The 120
Ω termination resistor should be enabled RS-485 endpoint stations; termination is
optional for RS-422. It should be disabled for all RS-232 modes and RS-485 intermediate stations.
If RS-485 mode is used, the differential twisted pair (TxD+/RxD+ and TxD-/RxD-) is formed by
connecting plus-to-plus and minus-to-minus.