Neoprogrammer 21.019 is a Windows utility for SPI/NAND/NOR flash and EEPROM chips often paired with low-cost CH341A USB programmer hardware. This guide shows how to install drivers, connect the CH341A, read/write common chips, verify images, and resolve frequent issues.
(originally derived from ASProgrammer) is an open-source alternative that revolutionized the CH341A experience. The version 21 019 (referring to a build from around 2021) is considered a "sweet spot" – stable, feature-rich, and widely supported.
is an advanced, community-favored software tool designed for the CH341A USB programmer , used primarily for flashing and repairing BIOS chips, EEPROMs, and other memory modules . It is a more feature-rich alternative to the original manufacturer software and the older AsProgrammer . Key Capabilities of NeoProgrammer 2.1.0.19 neoprogrammer 21 019 ch341a full
Windows may auto‑install a generic driver. For reliability:
Point to the folder containing the drivers to install it. It should appear as "USB-EPP/I2C/SPI CH341A". Step B: Download and Run NeoProgrammer 2.1.0.19 Neoprogrammer 21
Plug the CH341A into USB. LED on the programmer should light up.
Download the neoProgrammer 2.1.0.19 portable executable file. Extract the zip file. Run neoProgrammer.exe . The version 21 019 (referring to a build
:
This workflow covers most common scenarios using Neoprogrammer 21.019 with CH341A hardware: install, connect, backup, write, verify, and troubleshoot. For unusual chips or persistent failures, consult the chip datasheet or try a more advanced programmer with explicit support for the target device.
The standard "Black Edition" CH341A programmer natively supports 24-series I2C EEPROMs and 25-series SPI Flash chips. The 5V Data Line Danger
Many lite versions omit obscure chips. The "full" variant includes: