Well the saga of tearing apart things I don’t fully understand continues. I have now taken it apart to bits and pieces. Let’s just say it does not disassemble easily, it drew blood, as is tradition.
I’m sure someone out there that’s familiar with these things is raging at my terrible manhandling of a valuable piece of engineering. But here are the gory pictures.
So the main MCU appears to be an NXP unit that is really quite beefy. Data sheet here:
The other ST chip on the board I can’t find any real details on.