In Disagreement Ch341a |link|: Chip Main Memory With The Contents Are

In your software, look for a "Unprotect" or "Clear Status Register" button. If you've tried different cables, software, and voltages and it still fails at the exact same memory address every time, the flash chip itself may have a dead cell and need replacement. Summary Checklist Check your voltage: Are you feeding 3.3V to a 1.8V chip? Reseat the clip: This fixes 80% of "disagreement" errors.

Troubleshooting "Chip Main Memory with the Contents are in Disagreement" (CH341A)

Always follow this sequence: Detect > Read (and Save Backup) > Erase > Blank Check > Write > Verify. If the "Blank Check" fails, the chip is likely write-protected or damaged. 5. The Chip is Locked or Dead In your software, look for a "Unprotect" or

Use NeoProgrammer instead of the generic black-and-gold software.

Some chips have a status register that can be set to "Write Protect." If this is set, the programmer can usually read, but cannot write new data. Reseat the clip: This fixes 80% of "disagreement" errors

Use a multimeter to check your programmer’s pins. If it's outputting 5V on data lines, you may need to perform the "3.3V mod" (soldering a bridge) or use a 1.8V adapter if your chip requires it. 2. Poor Connection (The Bread and Butter of Errors)

The tiny SOIC8 clips used with these programmers are notoriously finicky. the programmer wrote the data

Specifically, the programmer wrote the data, read it back to verify, and found that the bits on the chip are different from the bits in your buffer.