CP302
I/O Module
ID 21112, Rev. 05
Page A - 6
©
PEP Modular Computers GmbH
A.4 Module Interfaces (Front Panel and On-board)
The front panel of the I/O module is integral with the CP302 baseboard front panel -
please see Figure 2-2 in Chapter 2.
The I/O module includes additional standard PC interfaces, two configurable COM
ports, one ECP/EPP compatible Parallel Port I/O Module Connection Interface and an
onboard HardDisk and floppy interface.
A.4.1 Serial Port Interfaces
Figure A-4: PC-compatible D-Sub Serial Interface
Two PC-compatible serial 9-pin DSUB ports are available with 5V
charge-pump technology eliminating the need for a +12V and -12V
supply. The two COM ports, which are fully compatible with the
16550 controller, include a complete set of handshaking and
modem control signals, maskable interrupt generation and data
transfer of up to 460.8 kB/s.
The two COM interfaces may be configured as RS232 and RS422
ports by setting the appropriate solder jumpers. The standard
setting of the two COM ports envisages the RS232 configuration.
A.4.1.1 Serial Port Connectors CON2 and CON6 Pinouts
The serial port male connectors CON2 and CON6 allow the connection of RS232,
RS422 and RS485 devices to the CP302 board.
RS422 Pinouts appear on the next page
Table A-2: Serial Port Connectors CON2 and CON6 Pinouts
(RS232 Mode)
DSUB 9
Signal
Function
In/Out
1
DCD
Data carrier detect
In
2
RXD
Receive data
In
3
TXD
Transmit data
Out
4
DTR
Data terminal ready
Out
5
GND
Signal ground
--
6
DSR
Data send request
In
7
RTS
Request to send
Out
8
CTS
Clear to send
In
9
RI
Ring indicator
In
1
5
6
9
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