Electronic control apparatus having a plurality of power source circuits

摘要

In an electronic control apparatus (50) having a one-chip microcomputer (60) and a power output circuit (82), a voltage abnormality detecting circuit (310) is provided to detect whether an output voltage of each power output circuit (82a, 82b) is set to a voltage in a predetermined range. A current abnormality detecting circuit (320) is also provided to detect that a current flowing into each power output circuit (82a, 82b) is in an excessive current condition or in a low current condition. The microcomputer (60) is reset when the detected output voltage or the detected current is abnormal.