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Kontron KT690-mITX (BGA) - dual core Manual de usuario Pagina 47

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KT690 Family
KTD-00738-J
Public
User Manual
Date 2012-06-01
Page
47
Serial Ports 4.11
Two RS232 serial ports are available on the KT690/mITX boards
The typical interpretation of the signals in the COM ports is as follows:
Signal
Description
TxD Transmitte Data, sends serial data to the communication link. The signal is set to a marking
state on hardware reset when the transmitter is empty or when loop mode operation is initiated.
RxD Receive Data, receives serial data from the communication link.
DTR Data Terminal Ready, indicates to the modem or data set that the on-board UART is ready to
establish a communication link.
DSR Data Set Ready, indicates that the modem or data set is ready to establish a communication
link.
RTS Request To Send, indicates to the modem or data set 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 telephone-ringing signal.
The connector pinout for each operation mode is defined in the following sections.
4.11.1 Com1 Pin Header Connector.
The pinout of Serial ports Com1 is as follows:
Note
Pull
U/D
Ioh/Iol
Type
Signal
PIN
Signal
Type
Ioh/Iol
Pull
U/D
Note
-
I
DCD
1
2
DSR
I
-
-
I
RxD
3
4
RTS
O
-
-
O
TxD
5
6
CTS
I
-
-
O
DTR
7
8
RI
I
-
-
-
PWR
GND
9
10
5V
PWR
-
-
1
Note 1: The Com1 header 5V supply is fused with a 1.1A resetable fuse.
A DB9 adapter (ribbon cable) can be used to make a DB9 pinout available.
4.11.2 Com2 Pin Header Connector.
The pinout of Serial ports Com2 is as follows:
Note
Pull
U/D
Ioh/Iol
Type
Signal
PIN
Signal
Type
Ioh/Iol
Pull
U/D
Note
-
I
DCD
1
2
DSR
I
-
-
I
RxD
3
4
RTS
O
-
-
O
TxD
5
6
CTS
I
-
-
O
DTR
7
8
RI
I
-
-
-
PWR
GND
9
10
5V
PWR
-
-
1
Note 1: The Com2 header 5V supply is fused with a 1.1A resetable fuse.
A DB9 adapter (ribbon cable) can be used to make a DB9 pinout available.
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