CH340 USB to TTL module transfer lines upgrade flash STC downloader

1.On board CH340 USB to RS232 interface conversion chip.

2.On board power light.

3.On board USB male head, convenient to connect the computer.

4.TTL chip pins has led to facilitate communication with microcomputer.

5.Working voltage: 5 v.

6.Board size: 18.2 (mm) x15 (mm).