Research of CPU Functional Safety Based on IEC 61508

Central Processing Unit (CPU), as one of the core devices in electronic equipment, whether it can operate safely and reliably directly affects the safety of the entire electronic equipment. However, the electronic equipment manufacturers concern much more about the functional safety of System on Chip (SoC), for the functional safety of the CPU there is no an independent and systematic solution. During the CPU design process, structure of redundant hardware and software diagnosis technology are used to reduce the random hardware failures. By using the systematic solution, the CPU can prevents unsafe states and reduce the probability of harmful events, and easily achieve SIL2 and SIL3 safety goal.