Note: If you are on Windows 10/11, you may need to temporarily disable digital signature enforcement to allow the driver to initialize.
: Allows you to connect to chips directly on the board without desoldering.
The CH341A logic runs at 5V by default. Many modern BIOS chips (25 series) and EEPROMs run at 3.3V . 5V will destroy them.
Look for the official CH341PAR driver package (Parallel/I2C/SPI mode). Do not use the CH341SER (Serial/COM port) driver, as NeoProgrammer requires the parallel interface driver to communicate over SPI.
Align of your chip (marked by a small dot or indentation) with the Pin 1 marker on the CH341A board. neoprogrammer 21 019 ch341a install
Verify that the folder contains NeoProgrammer.exe , along with supporting .dll files, language files, and the dev/ database folder containing chip definitions. Step 3: Configure NeoProgrammer for the First Time
Locate the NeoProgrammer.exe executable inside the extracted folder. 3. Installing the CH341A Parallel/Serial Drivers
What is the (e.g., Winbond W25Q64)? Are you using an SOP8 clip or have you desoldered the chip ? Share public link
A dialogue box will pop up displaying a list of potential chip matches based on the manufacturer ID and chip ID retrieved from the hardware. Note: If you are on Windows 10/11, you
Before launching the software, you must install the correct drivers to ensure your PC communicates with the programmer. Set the Jumper : Ensure the physical jumper on the CH341A device is on Pins 1 and 2 to enable "Programmer Mode". Locate Drivers : Within your NeoProgrammer folder, navigate to the Drivers/CH341A directory. For 64-bit Windows: Run DRVSETUP64.exe For 32-bit Windows: Run DRVSETUPx86.exe : Click the button. You may need to temporarily disable Driver Signature Enforcement on Windows 10/11 if the installation fails. 2. Software Setup NeoProgrammer is
: Right-click the downloaded ZIP file and select Extract All . Move the folder to a convenient location, such as your Desktop or a dedicated "Tools" folder. 2. Install the CH341A Drivers
Before writing a new BIOS or firmware, you often need to erase the chip completely. Click the "Erase IC" button.
If you are flashing a chip directly on a motherboard without desoldering it: Many modern BIOS chips (25 series) and EEPROMs run at 3
The CH341A USB programmer is a popular, low-cost tool used for flashing, backing up, and restoring EEPROM and SPI flash memory chips. It is widely used for fixing corrupted computer BIOS chips, unbricking routers, and reprogramming various electronic devices.
Reinstall the CH341A driver or try a different USB port. Conclusion
This is where most people fail. Windows will automatically install a generic driver that sort of works but crashes frequently.