FYI I successfully used a CH341A programmer without modification other than adding condensator in the input voltage to successfully read/write a 95128RT (
https://www.st.com/resource/en/datasheet/m95128-r.pdf) eeprom. No 5.5v modification is necessary, not adding jumper to use 5v. The 3.3v is in the range of voltage of this chip.
Probably works also without adding condensator.
Pinout of the chip is exactly the same as the 25xxx models.
To program I used AsProgrammer (
https://github.com/nofeletru/UsbAsp-flash/releases/) latest version in my case (2.0.2) that manage st95xxx chips.
A note, trying to connect the chip without desoldering do not allow the CH341A to be recognised as usb device (in win10). I didn't test on linux with flashrom command line application.
BTW thanks for this thread that gave me great help to win the fear to desolder and reprogram the eeprom.
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