MITX-V1K0 Series - User Guide, Rev. 1.0
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The COM ports need to install an OS patch from ITE. The patch is only available for
Windows and is not available Linux.
Table 32: Serial COM Signal Description
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.
TX+/-
Transmitted Data differential pair sends data to the communications link.
RX+/-
Received Data differential pair receives data from the communications link.
GND
Power Supply GND signal
