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KTD-N0903-C
Serial COM Ports (COM1-6, J19, J18, J37, J38, J10, J9)
7.9
Six RS232 serial ports are available via 10-pin-row connectors.
Note Ioh/Iol Type Signal PIN
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 marking state (-
TxD
12V) 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 establish a
DTR
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.
Note 1: The COM1/COM2 5V supply is fused with common 1.5A resettable fuse and similar for COM3/COM4
and COM5/COM6.
Available cable kit DB9 adapter cables are available for implementing standard COM ports on chassis.
PN 821017 - 100 mm or PN 821016 - 200 mm
Page 30
-
I
DCD
1 2
-
I
RxD
3 4
O
TxD
5 6
O
DTR
7 8
-
PWR GND
9 10
mITX-E38 Users Guide
Signal Type Ioh/Iol Note
DSR
I
-
RTS
O
CTS
I
-
RI
I
-
5V
PWR -
1
Internal Connectors
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