GTA04 MPU alternatives / CPU can work without MPU

[Werner Almesberger]

Andy Green wrote:
>  But I don't think it
> makes a serious issue if CPU core comes up at 1.2V before getting
> adjusted, it mainly affects the fastest speed for it.

If all else fails, the MPU could just switch off the regulators that
feed the CPU, assert RESET, then turn them on in the order it likes.
In all likeliness, the CPU will not have gotten any further than
starting to load SteppingStone at that time anyway.

- Werner