Requires the CH341PAR.SYS (Parallel/Interface) driver rather than the Serial (COM) driver to function in programmer mode.
Plug in your CH341A without a chip attached.
⚠️ ： 永远不要对原设备上的“病人芯片”进行写入操作 。如果必须写入，请使用备用芯片进行测试和验证，确认无误后再对原芯片进行操作。 neoprogrammer 21 019 ch341a best
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| CH341A Version | Compatibility with v2.1.0.19 | Recommended For | |----------------|-------------------------------|------------------| | (with 3.3V/1.8V jumper) | Excellent – auto-detects voltage mode | Modern BIOS (1.8V), laptops | | Green PCB (fixed 3.3V) | Good – disable 5V option in software | Desktop BIOS, 25 series EEPROM | | Blue PCB (5V-only) | Limited – requires external level shifter | Legacy 5V-only chips (avoid if possible) | Requires the CH341PAR
: To flash new firmware, use the "Erase" function first, then "Write IC" followed by "Verify" to ensure the data was written correctly. Troubleshooting Tips
This article explores why NeoProgrammer 2.1.0.19 is the best choice for your CH341A, how to use it, and best practices to ensure successful flashing. What is NeoProgrammer 2.1.0.19? But I need someone with your skills to
Some older black CH341A boards output 5V even when the jumper is set to 3.3V. This can damage 3.3V-only chips. If you have such a board, either modify it (removing the 5V regulator) or use a level shifter.
Click to copy the existing data. Always click Save File to store a backup binary file before initiating any modifications.
Unlike earlier builds (v2.1.0.18 and below), version introduces:
is a community-driven, feature-rich fork of the legacy AsProgrammer . When paired with the ubiquitous CH341A USB programmer (black PCB or revised green PCB), this software represents the best cost-to-capability ratio for reading, writing, and verifying 24/25 series SPI flash chips, I2C EEPROMs, and even some low-voltage microcontrollers.