Serial Ports Connectors - Seco SBC-D23 User Manual

3.3.13

Serial Ports Connectors

The PX30 Processor supports up to six UART Interfaces. Four of them are used on SBC-D23 board.
RS-232 Port #A Connector
Pin Signal Pin Signal
1 RS232_A_CTS 5
2 RS232_A_RTS 6
3 V 7
IN
4 +5V_STBY 8
RS232_A_RTS: COM Port #0 RS-232 Mode Request to Send handshaking signal.
RS-232 / UART Port #B Connector
Pin Signal
1 RS232_B_TX
2 RS232_B_RX
3 RS232_B_RTS
4 RS232_B_CTS
5 GND
RS232_B_RX: COM Port # RS-232 Mode Receive data
RS232_B_CTS: COM Port #4 RS-232 Mode Request to Send handshaking signal.
RS232_B_RTS: COM Port #4 RS-232 Mode Request to Send handshaking signal.
Debug UART Connector
Pin Signal
1 +3P3V_SW
2 DUART_RX
3 DUART_TX
4 GND
SBC-D23
SBC-D23 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B. - Reviewed by P.Z. - Copyright © 2021 SECO S.p.A.
UART Port #0 is made available, through a dedicated RS-232 transceiver on a dedicated Micro-fit 2x4
CN42
connector type Molex 43045-0812 or equivalent, with the pinout shown in the table on the left.
Mating connector: MOLEX 43025-0800 or equivalent with 43030 female crimp terminal.
RS232_A_TXD
RS232_A_TX: COM Port #0 RS-232 Mode Transmit data
RS232_A_RXD
RS232_A_RX: COM Port #0 RS-232 Mode Receive data
GND
GND
RS232_A_CTS: COM Port #0 RS-232 Mode Request to Send handshaking signal.
On Connector CN43, instead, it is available the UART Port #4, which can be available with
CN43
RS-232 or TTL interface (factory options).
For this purpose, a dedicated 5-pin connector, Type MOLEX p/n 53398-0571 or
equivalent is provided. Mating connector: MOLEX 51021-0500 receptacle with MOLEX
50079-8000 female crimp terminals.
UART Port #4 is managed as a factory alternative to microSD Slot, i.e. boards having this
port available (either in RS-232 or in UART TTL mode) will not have the microSD slot mounted.
RS232_B_TX: COM Port #4 RS-232 Mode Transmit data
The connector CN27, instead carries out signals related to UART #2 interface from PX30
CN27
processor. This interface can be used for the debugging of the processor.
The connector is type MOLEX p/n 53398-0471 or equivalent. Mating connector: MOLEX 51021-
0400 receptacle with MOLEX 50079-8000 female crimp terminals.
DUART_TX: UART port #2 Transmit signal, +3P3V_SW electrical level
DUART_RX: UART port #2 Receive signal, +3P3V_SW electrical level
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