ACCELERATION DETECTION DEVICE AND PORTABLE APPARATUS HAVING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an acceleration detection device capable of monitoring state change using an optional attitude as a trigger.

SOLUTION: A data acquisition part 2 is an A/D conversion part subjecting acceleration data detected by a tri-axial acceleration sensor 1 to A/D conversion. A determination object information calculation part 3 calculates determination information from a digital conversion value of a detection signal from the acceleration sensor 1, and a first predetermined value. A determination part 5 comprises: a comparison function comparing a calculation result calculated by the determination object information calculation part 3 with a second predetermined value; and a continuation number determination function determining whether a maintaining number of magnitude relation of comparison results by the comparison function becomes larger than a third predetermined value. When the maintaining number of the magnitude relation of determination results by the determination part 5 becomes larger than the third predetermined value, an interrupt signal is transferred to an external CPU 8.

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