The "3 1" in your query likely refers to its support for 3.3V and 5V power levels or its compatibility with USB 3.1 ports (though the chip itself typically runs at USB 2.0 speeds). 🛠️ Key Technical Specifications USB Bus Adapter Chip CH341
Here’s a suggested folder structure and content package for a USB drive dedicated to the CH341 (v3.1) series of programmers (e.g., CH341A, CH341B, used for 24/25 series EEPROM/Flash, I2C, SPI).
📁 Folder Structure CH341_v3.1_Programmer/ │ ├── 01_Drivers/ │ ├── Windows/ │ │ ├── CH341SER.EXE (Official serial driver) │ │ ├── CH341PAR.EXE (Parallel/SPI driver) │ │ └── CH341_3.1_Win10.zip │ ├── Linux/ │ │ ├── ch341eeprom.c │ │ └── 99-ch341.rules │ └── Mac/ │ └── ch341ser.kext (legacy) │ ├── 02_Software/ │ ├── AsProgrammer_2.1.0.13/ (supports CH341 3.1) │ ├── NeoProgrammer_2.2.0.10/ │ ├── CH341_Programmer_v3.1.exe (official minimal) │ ├── flashrom_Windows_x64/ │ └── SNANDer_Windows/ │ ├── 03_Documents/ │ ├── CH341_DataSheet_v3.1.pdf │ ├── CH341_Application_Note.pdf │ ├── Pinout_Guide.png │ └── CH341A_vs_CH341B_Notes.txt │ ├── 04_Firmware_Examples/ │ ├── 24Cxx_EEPROM/ │ ├── 25SPI_Flash/ │ └── I2C_Devices/ │ └── 05_Tools/ ├── USBDeview.exe ├── Zadig_2.8.exe └── CH341_Test_GPIO.zip
📄 Key Content Details Drivers (Windows) usb drive ch341 3 1
CH341SER.EXE – v3.5 (latest as of 2025, compatible with v3.1 hardware) CH341PAR.EXE – for parallel/SPI mode Use Zadig (in 05_Tools ) to force driver if needed.
Software
AsProgrammer – supports CH341 3.1, good for EEPROM/BIOS flashing. NeoProgrammer – fork with better chip support. Official CH341 Programmer v3.1 – basic, but reliable for simple SPI/I2C. flashrom – command-line, cross-platform. The "3 1" in your query likely refers
Documents
CH341DS3.PDF – datasheet. Pinout Guide – image on how to connect SOIC8/SOP8 clips.
Firmware Examples
Dump/backup scripts for common BIOS (25Q64, 25Q128). I2C read/write examples.
Tools