FYI - For those of us with the first gen Aveo's, this info should
apply, with the exception of the 04/05 MY I have yet to confirm they use the same platform:
So the chip in the lower left with 'AM29bl....' is our flash memory, according to the datasheet for it this is the 8MB chip. The larger chip with 'TriCore' is the main MCU/CPU - and is quite a capable little chip for an econo-box. This is TOP shelf stuff in the EMS world! The 'Delphi' chip with a 466 on it is most likely the memory management/watchdog chip. (only speculation at this point on the Delphi chip) The others are just voltage regulators/filters, some DC motor driver(s), injector drivers, and other ancillary stuff we need.
FWIW: there are open source tools, and an RTOS 'OS' available that has been ported to the tricore 32-bit. see www.hightec-rt.com
for the scoop. The GCC tool-chain is Eclipse ready and slaps right in. So make note, the entire chain of tools is available in the open source flavors to individuals for learning or reworking your own rig.
For some background: Operating Systems - Infineon Technologies