I pulled mine apart to see what I could see, and am curious if (a) IDA Pro would be any use on this architecture, and (b) anyone has hacked into it yet.
IC600
R4F70590 - Automotive Flash Memory
Architecture: RISC
Data Bus: 32 Bit
1.5M ROM, 80K RAM
IC400
64F7055BP40
Renesas 32-Bit RISC Microcomputer