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Description:
1>. The development board is integrated with USB to serial serial chip (CH340G), which can be downloaded to the development board by using the USB port of the computer. At the same time, you can use USB port to supply power for development board.
2>. The integrated USB turn serial port (TTL) can communicate with the external circuit TTL circuit separately as the USB turn TTL, and select the OUT end through the JP4 jump on the board.
3>. All IO leads to a USB to TTL pin (3PIN).
4>. A user LED lamp.
5>. Serial port and transceiver LED each.
6>. A serial port USB power supply LED.
7>. A CPU power supply LED.
8>. 3.3V or 5V external power supply interface.
9>. The USB TTL pin interface, can be used as USB to TTL.
10>. 4 screw positioning holes, easy to locate and prevent circuit board short circuit.
11>. A cold start download button, but also a power switch.