Interfaces and Connectors
EBX-18 Hardware Reference manual
32
S
ERIAL
P
ORT
A
SSIGNMENT
The EBX-18 only supports the use of the Vortex86DX2 Serial Ports 1, 2, 4, and 9, so all other
serial ports are disabled and not available in the BIOS Setup Utility. Table 19 lists the
recommended settings (tested with Windows 7) for the Vortex86DX2 serial ports, along with
correlation to the board’s J4 I/O connector (shown in the rightmost column).
Table 19: Recommended Serial Port Settings for Vortex86DX2 BIOS
DX2 Serial Port #
I/O Address
IRQ
EBX-18 COM # (Note)
1
3F8h
4
COM1
2
3E8h
3
COM3
4
2E8h
11
COM4
9
2F8h
10
COM2
Note:
COM ports are numbered to match EBX-18 I/O connector COM numbering.
S
ERIAL
P
ORT
C
ONNECTORS
See Table 2 on page 13 for connector and cable information. The pinouts of the DB9M
connectors apply to the serial connectors on the CBR-5009B paddleboard. These connectors use
IEC 61000-4-2-rated TVS components to help protect against ESD damage.
Table 20: COM1/COM2 Pinout – CBR-5009B Connector J3
Top DB9 Connector Pin
(COM1)
Bottom DB9 Connector Pin
(COM2)
RS-232 Signal
1
10
DCD
2
11
RXD*
3
12
TXD*
4
13
DTR
5
14
Ground
6
15
DSR
7
16
RTS
8
17
CTS
9
18
RI