Serial Com1 - Com2 Ports (J21, J25) - Kontron mITX-BDW-U Manual

Available cable kit:
PN 821042 Cable Front Panel Open-End, 300 mm
09.10. SERIAL COM1 – COM2 PORTS (J21, J25)
Two RS232 serial ports are available on the mITX-BDW-U.
The typical definition of the signals in the COM ports is as follows:
SIGNAL DESCRIPTION
Transmitted Data, sends data to the communications link. The signal is set to the
TxD
marking state (-12 V) on hardware reset when the transmitter is empty or when loop
mode operation is initiated.
RxD Received Data, receives data from the communications link.
Data Terminal Ready, indicates to the modem etc. that the on-board UART is ready to
DTR
establish a communication link.
Data Set Ready, indicates that the modem etc. is ready to establish a communications
DSR
link.
Request To Send, indicates to the modem etc. that the on-board UART is ready to
RTS
exchange data.
CTS 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
DCD
carrier.
Ring Indicator, indicates that the modem has received a ringing signal from the
RI
telephone line.
The pinout of Serial ports COM1 (J21), COM2 (J25)
NOTE IOH/IOL TYPE
- I
- I
O
O
- PWR
MITX-BDW-U (KTD-NO886-B)
SIGNAL PIN
1
DCD
3
RxD
5
TxD
7
DTR
9
GND
www.kontron.com
SIGNAL TYPE
2
DSR I
4
RTS O
6
CTS I
8
RI I
10
5V PWR
IOH/IOL NOTE
-
-
-
- 1
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