Kontron KTT30-mITX - Manual (Page 24)

KTD-N0857-A Page 21 Pin Connectors
KTT30/mITX Users Guide
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Warning: Do not mix the ccTalk Connector with the Fan Connector. If mounting ccTalk device into Fan
Connector then ccTalk device and or mother board might be damaged.
8.3 COM ports (RS232)
Two serial ports provide asynchronous serial communication with RS-232 interfaces. They are 16450/
16550 UART compatible and support 16-byte FIFO buffers for transfer rates from 50 Baud to 115.2 kBaud.
UARTC/UART3 can be configured as a standard serial or as a ccTalk interface. With a solder jumper it is
possible to activate the ccTalk interface, often used in automatic payment equipment.
Connector assignment:
J3  UARTA/UART1
J6  UARTC/UART3
The serial ports are available through the connectors J3 and J6 (10 pins).
8.4 ccTalk Connector
The ccTalk interface uses the fan connector J29 (4 pins).
Header Pin Signal Description Type
1 VCC5 1) Power +5V PWR
2 N.C. Not connected NC
3 GND Ground PWR
4 DATA Serial data line (RXD/TXD) IO
Notes: 1) To protect the external power lines of peripheral devices make sure that
- the wires have the right diameter to withstand the maximum available current.
- to enclosure of the peripheral device fulfills the fire-protecting conditions of IEC/EN 60950.
2) The +5V supply voltage is protected with a common 1.5A resetable fuse.
Header Pin Signal J3 J6 Description Type
1 DCD#  Data carrier detect I
2 DSR#  Data set ready I
3 RXD   Receive serial data I
4 RTS#   Request to send O
5 TXD   Transmit serial data O
6 CTS#   Clear to send I
7 DTR#  Data terminal ready O
8 RI#  Ring indicator I
9 GND   Ground PWR
10 VCC5 1) 2)   Power +5V PWR
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