Even compared to its successors, AsProgrammer 2.1.0.13 is known for its performance and stability. Many users seek it out for its reliability with the cheap, ubiquitous CH341A programmer. Some report that while NeoProgrammer has fixed certain issues, its stability can sometimes vary, leading users to fall back on the reliable 2.1.0.13 version.
The software is open-source, released under the MIT license, and does not require a traditional installation as it is a portable application. It has a relatively small file size of around 1.5 to 2 MB.
to create a backup of the current firmware before making changes. Erase & Blank Check button followed by Blank Check
: Click Verify IC to compare the chip's contents against your buffer file. If the verification is successful, your chip is ready. Important Safety and Prevention Tips asprogrammer 21013 hot
What does “Hot” mean in this context? Is it a dangerous thermal warning? A slang term for a popular "cracked" or modded version? Or an indicator of blazing-fast programming speeds?
ASProgrammer is a free, open-source graphical interface tool designed for programming serial memory chips. Initially created by developer Alexander as a utility for UsbAsp, the software has evolved significantly since its inception around 2011. Today, ASProgrammer is widely recognized as one of the most versatile programming solutions for CH341A-based programmers, supporting a broad range of chips including SPI NOR Flash, I2C EEPROMs, and various other memory devices.
As new chip models enter the market, maintaining an up-to-date chip database becomes essential. NeoProgrammer, a fork of ASProgrammer, supports over as of early 2025. While ASProgrammer itself may have a more limited database, users can manually add new chip definitions or switch to updated forks for broader compatibility. Even compared to its successors, AsProgrammer 2
AsProgrammer is a portable application, meaning it does not require a traditional installation process.
Plug your CH341A programmer into a USB port on your computer. In the AsProgrammer main window, go to the menu and select "CH341a".
Select your new BIN or HEX file and click "Program". The software is open-source, released under the MIT
尽管软件功能强大，但在使用过程中也可能遇到一些常见问题，以下是一些典型解决方案：
Click the icon if the chip uses hardware write protections.
A simple 10x10mm aluminum heatsink on the CH341A IC reduces temperatures by 10-15°C.
The software download usually includes a CH341-Drivers folder. Before using the programmer, install the CH341A driver by running the appropriate installer for your Windows version. You can verify the driver is installed correctly by checking your under "Ports (COM & LPT)" or "Universal Serial Bus controllers".
In ASProgrammer 2.1.0.13, go to and select “Slow” (1 MHz instead of 12 MHz). Slower operations reduce current draw and heat.