Usb Drive Ch341 3 1 | CERTIFIED → |

CH341 (v3.1)

Here’s a suggested folder structure and content package for a USB drive dedicated to the series of programmers (e.g., CH341A, CH341B, used for 24/25 series EEPROM/Flash, I2C, SPI).

BIOS/EEPROM Programmer

: Its primary use is backing up, erasing, and reprogramming 24-series (I2C) and 25-series (SPI) flash chips found on motherboards and graphics cards. usb drive ch341 3 1

The CH341 is a popular, low-cost USB interface chip manufactured by WCH (Nanjing Qinheng Microelectronics). It allows a computer to communicate with various low-level hardware protocols via USB. CH341 (v3

Read or write to I2C sensors (temperature, humidity, accelerometers) or OLED displays directly from your PC using Python (via pyusb or libusb ). It allows a computer to communicate with various

CH341A v1.6 (Switchable Voltage)

: A newer iteration that includes a voltage select switch, eliminating the need for manual "volt mods" when working with sensitive 3.3V or 1.8V chips. Key Performance Features

The chip is primarily used in affordable "MiniProgrammer" modules to flash BIOS and EEPROM chips. WCH CH341A - Datasheet.pdf

The problem:

Those SPI flash chips are native 3.3V devices . Their absolute maximum voltage rating is often 3.6V. Feeding them 5V from an unmodified CH341A will: