PORTABLE ELECTRONIC DEVICE

摘要

The purpose of the present invention is to provide a portable electronic device and an abnormality detection circuit which are capable of detecting an overcurrent caused by the failure of an electronic circuit etc. with great precision and responsiveness, and which are capable of reducing the consumption of power required to detect an abnormality. By reducing current abnormality detection cycles in a fixed period after the function mode of a functional unit (11) has changed, the responsiveness to a current abnormality after the function mode has changed is improved, and the consumption of power required to detect a current abnormality is reduced by increasing the length of the cycles when a current abnormality is not detected within the fixed period.