CP6000
Functional Description
ID 27942, Rev. 05
© 2005 Kontron Modular Computers GmbH
Page 2 - 15
2794
2.05.UG.VC.051020/17275
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P R E L I M I N A R Y
2.3.5
COM Ports
The CP6000 provides two COM ports, COM1 and COM2. COM1 is available on the front panel
as a 9-pin, D-Sub, PC-compatible connector, and is routed to rear I/O. COM2 is only available
on the rear I/O. Thus, COM1 and COM2 are also available on the CTM80-2 RIO module.
COM1 and COM2 are fully compatible with the 16550 controller and 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 either RS-232, RS-422 or RS-
485 ports by setting the appropriate solder jumpers. The standard setting of the two COM ports
envisages the RS-232 configuration.
RS-422 configuration:
The RS-422 interface uses two differential data lines RX and TX for communication (Full-Duplex).
RS-485 configuration:
The RS-485 interface uses one differential data line. It differs from the RS-422 mode in that it
provides the ability to transmit and receive over the same wire. The RTS signal is used to en-
able the RS-485 transmitter.
The following figure and table provide pinout information for the serial port connector J9, which
depends on the interface configuration.
2.3.6
Floppy Drive Interface
The onboard floppy disk controller supports either 5.25 inch or 3.5 inch (1.44 or 2.88 MB) floppy
disks.
The floppy disk port is only available on the CompactPCI rear I/O interface
.
Figure 2-5: Serial Port Con. J9 (COM1)
6
9
5
1
Table 2-13: Serial Port Con. J9 (COM1) Pinout
PIN
RS-232
(STANDARD PC)
RS-422
RS-485
1
DCD
+RXD
NC
2
RXD
NC
NC
3
TXD
+TXD
+TRXD
4
DTR
NC
NC
5
GND
GND
GND
6
DSR
-RXD
NC
7
RTS
NC
NC
8
CTS
-TXD
-TRXD
9
RIN
NC
NC
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