Serial Ports; Com Port Configuration - VersaLogic VL-EPME-30ECP Hardware Reference Manual

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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

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.
Bengal (VL-EPMe-30) Reference Manual
CBR-5015
Signal
Connector
RS-232 RS-422/485
Ground Ground
RXD1 RxD1-
CTS1 RxD1+
J3 Top
COM1
Ground Ground
TXD1 TxD1-
RTS1 TxD1+
Ground Ground
RXD2 RxD2-
CTS2 RxD2+
J3 Bottom
COM2
Ground Ground
TXD2 TxD2-
RTS2 TxD2+
2 Ground
2
1
AUX I C Clock
J2
2
3 AUX I C Data
4 Ground
B1 Battery Input
5 GPIO2
6 Ground
7 GPIO1
J2
8 3.3 V Power for LEDs
12 Ground
9 Ethernet 0 LED
10 Ethernet 1 LED
Interfaces and Connectors
J18 CBR-5015
Pin Connector
25
J5 Top
26 USB1 Data +
USB 1
27
28
J5 Bottom
29 USB2 Data +
USB 2
30
31
J4 Top
32 USB3 Data +
USB 3
33
34
J4 Bottom
35 USB4 Data +
USB 4
36
37 +5.0 V (Protected)
38 D1 Programmable LED
39 SP1
40 S2, J2 Pin 11 Pushbutton Reset
41 S1, J2 Pin 13 Power Button
42 J2 Pin 14
43
J6
44
USB 5
45
46
47
48
Not
Functional
49
50
Jumper Summary
Signal
USB1 +5.0 V
USB1 Data -
USB2 +5.0V
USB2 Data -
USB3 +5.0 V
USB3 Data -
USB4 +5.0V
USB4 Data -
Speaker
Ground
USB5 +5.0 V
USB5 Data+
USB5 Data-
Ground
USB5 +5.0 V
NC
NC
Ground
for
26