12 Serial-Communication Interfaces
Kontron User's Guide EPIC/CE
39
12
Serial-Communication Interfaces
12.1
Serial Ports COM A to COM D
Four fully functional serial ports (COM A, COM B, COM C, and COM D) provide asynchronous serial
communications. The serial ports support RS-232 operation modes and are compatible with the serial-
port implementation used on the IBM Serial Adapter. You also can use COM D for RS-422/485
communications. The ports are 16550 high-speed UART compatible and support 16-byte FIFO buffers for
transfer rates up to 115.2Kbaud. COM A is available on a standard DSUB9 connector on the front while
the other COM ports are available on internal connectors.
COM A is available through the standard DSUB9 connector, which is part of the multi-function Connector
X1 on the front. COM B to COM D are available through Connectors X15, X16 and X17 (10 pins in line). To
find the location of the serial ports on the board, please see the Appendix E: Connector Layout chapter.
12.2
RS-232 Connectors
COM A is available through the standard DSUB9 connector, which is part of the multi-function Connector
X1 on the front.
The following table shows the pin-out.
Header
Pin
Signal Name
Function
In / Out
1
/DCD1
Data Carrier Detect
In
2
SIN1
Receive Data
In
3
SOUT1
Transmit Data
Out
4
/DTR1
Data Terminal Ready
Out
5
GND
Signal Ground
--
6
/DSR1
Data Set Ready
In
7
/RTS1
Request to Send
Out
8
/CTS1
Clear to Send
In
9
/RI1
Ring Indicator
In
Summary of Contents for EPIC/CE
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