Using AsProgrammer with a CH341A programmer is straightforward. Follow these steps for successful operation: 1. Preparation
Once error 21013 is gone, you can read/write SPI flash reliably.
It is widely preferred over the native CH341A software because of its better chip detection, wider support for modern Flash ICs, and improved stability in reading/writing (e.g., 25Qxx series, 24 series EEPROMs). Key Features and Updates (v2.1.2)
BIOS Flashing on Windows or Linux using a CH341a MiniProgrammer asprogrammer+21013
Last week, I revived a dead Gigabyte motherboard. The BIOS splash screen was gone—corrupted M-Flash. Using the CH21013 with ASprogrammer, I desoldered the 8-pin Winbond, clipped it into the ZIF socket, and flashed a clean ROM from the manufacturer’s website. Ten minutes later, the board POSTed like new.
Mastering AsProgrammer 2.1.0.13: A Comprehensive Guide to CH341A-SPI EEPROM Programming
Strictly speaking, there is no official IC called the "CH21013." This is almost always a for the CH341A . It is widely preferred over the native CH341A
Click "Open" to load a .bin or .rom file from your computer.
"asprogrammer+21013" represents a reliable, robust version of one of the most user-friendly programming tools available. With its automatic chip detection, one-click programming, and critical file-conversion fixes, it is an essential utility for anyone working with SPI Flash or EEPROMs. While its community versions continue to evolve, the core logic and stability of version 2.1.0.13 define its enduring value in the world of hardware programming.
A CH341A USB programmer (often called the "Black Edition"). Using the CH21013 with ASprogrammer, I desoldered the
Error 21013 in ASProgrammer usually means:
Click Read IC . This dumps the current firmware into the buffer. Always save a backup (File > Save) before modifying anything.
As we move deeper into 2026, the demand for fast, secure, and robust applications continues to grow. Traditional development methods often create technical debt that slows down innovation.
[Connect Hardware] ➔ [Detect/Select IC] ➔ [Read & Backup] ➔ [Erase] ➔ [Open New Bin] ➔ [Write & Verify] Step 1: Connect the Chip
Added MICROWIRE support for the CH347T interface.