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


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-1684JD4 DEBUG port: