TQ MB-SMARC-3, Руководство пользователя

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User's Manual l MB-SMARC-3 UM 0100 l © 2022, TQ-Systems GmbH Page 12
3.6.5 Gigabit Ethernet
The MB-SMARC-3 provides two common 10/100/1000 Mbps speed Gigabit Ethernet ports. For both ports the Ethernet signals of
the SMARC module are used.
Table 5: Function of Ethernet LEDs
LED Colour Function
Green Link is up (Link is connected)
Orange / Yellow Act (Blinks at data transfer)
Illustration 7: RJ45 Connectors, X8
3.6.6 Serial Interfaces (RS-232)
The MB-SMARC-3 provides up to six serial ports:
•
RS-232 port at on-board connectors X35, X36, X42, X43, X47, X48
The SMARC specification does provide following signal definitions for the serial ports:
• Rx / Tx / RTS / CTS for port 0 and 2
• Rx / Tx for port 1 and 3
RS-232 connector: For usage of the RS-232 ports with an adapter cable (see chapter Accessories 2.4)
•
Connector type: Molex 53398-1071
•
Mating connector: Molex 51021-1000
Table 6: RS-232 D-Sub Connector
Illustration 8: Molex Connector and
RS-232 D-SUB Connector
An ESPI UART is realized on the MB-SMARC-3 to support two more serial ports. SER5 is equipped with an RS232 / RS485 / RS422
multilevel transceiver.
Please contact
TQ-Support for further information about available serial ports.
Note: Typo on PCB
The note on the PCB about the DIP switch S4 refers to SER4, which is unfortunately wrong. The switches
influence SER5 !
Pin
RS-232 Signal
(all signals)
MB-SMARC-3
D-Sub connector
(with DSUB-Adaptor)
1 DCD NC –
2 DSR NC RXD
3 RXD RXD TXD
4 RTS RTS –
5 TXD TXD GND
6 CTS CTS –
7 DTR NC RTS
8 RI NC CTS
9 GND GND –
10 – NC –
1