CH341A_Mini_Programmer

hardward, software used for

sotfware used

https://github.com/xiaolaba/UsbAsp-flash_AsProgrammer
2.03a

hardward used

CH341A Mini Programmer 土豪金
原來5V, 改成 3.3V IO

REF:

https://bbs.pigoo.com/thread-84511-1-1.html
http://diybcq.com/thread-144131-1-1.html
https://www.onetransistor.eu/2017/08/ch341a-mini-programmer-schematic.html

driver

http://www.wch.cn/downloads/CH341PAR_EXE.html
http://www.wch.cn/downloads/CH341SER_EXE.html

CH341PAR.EXE, USB programmer

CH341 2.2 2021-10-16 269KB
CH341USB转IIC、SPI等接口的WINDOWS驱动，支持32/64位 Windows 11/10/8.1/8/7/VISTA/XP，SERVER 2019/2016/2012/2008/2003， 2000/ME/98，通过微软数字签名认证，支持USB转EPP/MEM并口，支持USB转同步串口：IIC/I2C、SPI等，用于随产品发行到最终用户。
donwload CH341SER.ZIP

CH341SER.EXE, USB - SERIAL

CH340G，CH340T，CH340C，CH340N, CH340K, CH340E，CH340B，CH341A，CH341F, CH341T，CH341B，CH341C，CH341U 3.7 2022-03-02 631KB CH340/CH341 USB转串口WINDOWS驱动程序，支持32/64位Windows 11/10/8.1/8/7/VISTA/XP，SERVER 2022/2019/2016/2012/2008/2003，2000/ME/98，通过微软数字签名认证，支持USB转UART/3线和9线SERIAL串口等，用于随产品发行到最终用户。

downaload CH341PAR.EXE

schematic

modification

cut 5V trace, short pin header 3.3V - 5V, the device will be 3.3V IO and supply to CH341A chip.

theory and my workdone, it is great