Electronic control unit for use in electrical servo steering device of steering wheel system of vehicle, has microcomputer comprising CPU for storing global variable, where task of low order executes duplication method

摘要

The unit (10) has a microcomputer (11) comprising a CPU (12) for storing global variable that is used by a task of high order and a task of low order, where the task of high order has a relative high priority order, and the task of low order has a relative low priority order. The task of high order executes an actualization method of high order under usage of a memory area and the task of low order executes a reference method of low order under usage of another memory area when the variable is actualized by the task of high order, where the task of low order executes a duplication method.