A Custom Built Microcomputer System for Automotive Applications

A custom microprocessor system (CPU, I/O, ROM) has been developed especially for automotive applications. The design goal was to create a chip-set which can be manufactured for reasonable costs, meets the tough reliability and environmental conditions, and performs well enough for modern engine control requirements. The system was designed in close cooperation with a semiconductor house (AMI) so that all design trade-offs were transparent to the original system designers.

The first part deals with the general design philosophy. The second gives some detailed information on the microprocessor system itself.