There is no single CPU; it's a multitiered control system with at least two of the tiers automotive/military grade components for realtime systems. ref. https:

There is no single CPU; it's a multitiered control system with at least two of the tiers automotive/military grade components for realtime systems. ref. https://news.ycombinator.com/item?id=26907669 https://news.ycombinator.com/item?id=26907669 for more details for example.