Method for monitoring operation of subsystem of digital processing unit e.g. computer core of digital system, involves checking arithmetic operation and inverse arithmetic operation of subsystem of digital processing unit

摘要

The method involves monitoring a subsystem (4) of digital processing unit (1) by external monitoring circuits (6,8). The arithmetic operation and inverse arithmetic operation of the subsystem of digital processing unit are checked by the external monitoring circuits for execution. An independent claim is included for digital system.