CH341A programmer supports 5V, 3.3V and 1.8V voltage switching

CH341A has a built-in independent transceiver buffer and supports simplex, half-duplex or full-duplex asynchronous serial communication. Serial data includes 1 low-level start bit, 5 to 8 data bits, 1 or 2 high-level stop bits, and supports odd parity/even parity/flag parity/blank parity. CH341A supports common communication baud rates: 50, 75, 100, 110, 134.5, 150, 300, 600, 900, 1 200, 1 800, 2 400, 3 600, 4 800, 9 600, 14 400, 19 200, 28 800, 33 600, 38 400, 56 000, 57 600, 76 800, 115 200, 128 000, 153 600, 230 400, 460 800, 921 600, 1 500 000, 2 000 000, etc.

A self-restoring insurance has been added, three voltage schemes, 1.8V, 3.3v.5v, and two operating modes have been added.

First preview:

With two interface solutions, a large number of tantalum capacitor pads are placed on the entire board. Ensure the stability of the equipment.

The chip voltage has an LED indicator, and you can judge the current voltage by observing the bright changes of the LED. The 5V-indicator light is very bright and a bit dazzling, the 3.3V-indicator light is soft and not dazzling, and the 1.8V indicator light is dim.

Real object:

ASM1117 is used as a step-down chip, which has low cost and strong component versatility.

The software can recognize the programmer normally

TTL mode can also be recognized normally.

I don’t know why, but the board file is not displayed. I have re-edited the project. If the PCB information is still not displayed.

Please download "H341A project file.ZIP"

Then use the EDA Professional Edition software, Import-Professional Edition, select the CH341A project file to open.