Serial Com 1 - Com 4 Ports (Coma, Comb, Comc & Comd); Table 29: Pin Assignment Coma, Comb, Comc, Comd; Table 30: Serial Com Signal Description; Figure 24: Serial Com Coma, Comb, Comc, Comd - Kontron MITX-CFL0 Series User Manual

7.8. Serial COM 1 - COM 4 Ports (COMA, COMB, COMC & COMD)
The serial connections COMA, COMB, COMC and COMD provide RS232 connections.

Figure 24: Serial COM COMA, COMB, COMC, COMD

Table 29: Pin Assignment COMA, COMB, COMC, COMD

Pin RS232 Signal
1 DCD
2 DSR
3 RXD
4 RTS
5 TXD
6 CTS
7 DTR
8 RI
9 GND
10 +5V
The COM ports need to install an OS patch from ITE. The patch is only available for
Windows and is not available Linux.

Table 30: Serial COM Signal Description

Signal
TXD
RXD
DTR
DSR
RTS
CTS
DCD
www.kontron.com
Description
Transmitted Data, sends data to the communications link. The signal is set to the marking
state (-12 V) on hardware reset when the transmitter is empty or when loop mode
operation is initiated.
Received Data, receives data from the communications link.
Data Terminal Ready, indicates to the modem etc. that the on-board UART is ready to
establish communication link.
Data Set Ready, indicates that the modem etc. is ready to establish a communications link.
Request To Send, indicates to the modem etc. that the on-board UART is ready to
exchange data.
Clear To Send, indicates that the modem or data set is ready to exchange data.
Data Carrier Detect, indicates that the modem or data set has detected the data carrier.
MITX-CFL0 Series - User Guide, Rev. 1.1
Note
// 44