Com3/Com4 (Internal); Figure 12: Com3/4 Internal Connector; Figure 13: Available Cable Kit (Db9 Adapter Cables) - Kontron mITX-SKL-S-H110 User Manual

6.9. COM3/COM4 (internal)

Figure 12: COM3/4 Internal Connector

Pin Description
1 DCD
3 RXD
5 TXD
7 DTR
9 GND
Signal Description
TxD 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.
RxD Received Data, receives data from the communications link.
DTR Data Terminal Ready, indicates to the modem etc. that the on-board UART is ready to establish
communication link.
DSR Data Set Ready, indicates that the modem etc. is ready to establish a communications link.
RTS
Request To Send, indicates to the modem etc. that the on-board UART is ready to exchange data.
CTS
Clear To Send, indicates that the modem or data set is ready to exchange data.
DCD Data Carrier Detect, indicates that the modem or data set has detected the data carrier.
RI Ring Indicator, indicates that the modem has received a ringing signal from the telephone line.

Figure 13: Available Cable Kit (DB9 adapter cables)

PN 821017 - 100 mm / PN 821016 - 200 mm
www.kontron.com
mITX-SKL-S/H110 – Rev. 1.1
Pin Description
2 DSR
4 RTS
6 CTS
8 RI
10 0 V
// 31