Serial port module¶

USB to TTL serial port module ¶

Product parameters¶

Brand: Firefly
Size: 25mm*15.5mm

Technical information¶

Driver download: http://www.prolific.com.tw/US/ShowProduct.aspx?pcid=41

Physical map¶

_images/module_serial_list.png

Connection method¶

USB to Serial adapter with four pins:

3.3V power supply (NC), no connection required
GND, the ground wire of the serial port, connect to the GND pin of the serial port of the development board
TXD, the output line of the serial port, connected to the TX pin of the serial port of the development board
RXD, the input line of the serial port, connect to the RX pin of the serial port of the development board

Note: If you encounter the problem that TX and RX cannot be input and output when using other serial adapters, you can try to reverse the connection of TX and RX.

AIO-1684XQ DEBUG port:

_images/debug_connection.png