Serial Ports - Seco SECOCQ7-mITX2.0 User Manual

SECOCQ7-mITX2.0
User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B. - Reviewed by G.M.

3.3.11 Serial ports

Introduced with Qseven
possibility to have one Serial port (TX/RTS#/RX/CTS# signals, pins 171, 172, 177, 178 of the
connector) at TTL level. Since most common use of Serial ports require that they are available at
RS-232 electrical level, on SECOCQ7-mITX2.0 Carrier board it has been integrated an RS-232
transceiver.
This port is carried out on a double standard DB-9 male connector, CN26 (the upper one DB9
male). The pinout is standard for this kind of connector, but it is reported here following for
completeness of documentation.
COM1 Connector – CN26
Pin Signal
1 ---
2 UART0_RX_RS232
3 UART0_TX_RS232
4 ---
5 GND
On the second DB9 connector (the lower one) it is reported a CAN port, whose signals come from
®
Qseven golden finger connector and are carried out through a CAN transceiver SN65HVD232.
Pinout of CAN Connector is reported in the following table:
CAN Connector – CN26
Pin Signal
1 ---
2 CAN_L
3 CAN_SHLD
4 ---
5 GND
CAN interface can optionally be terminated with a 120Ω Resistor, in case SECOCQ7-mITX2.0
Carrier Board is at one of the end of CAN line. To enable this termination, is necessary to use
jumper JP7.
120Ω CAN Termination
JP7
Inserted Termination present
Not inserted Termination disconnected
®
specifications Rel.2.0, on the golden finger connector there is the
Pin Signal
6 ---
7 UART0_RTS#_RS232
8 UART0_CTS#_RS232
9 ---
Pin Signal
6 ---
7 CAN_H
8 ---
9 +12V
DC
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SECOCQ7-mITX2.0
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