| 摘要 |
<p>PROBLEM TO BE SOLVED: To suppress current consumption sufficiently even in noisy use environment by judging whether an input signal is normal or abnormal when the input signal varies in a sleep state, starting a normal process when it is judged that the input signal is normal, and entering the sleep state immediately if it is judged that the signal is abnormal. SOLUTION: An MPU 11 inputs input signals from switches 35 and 36, etc., and an antenna 37, other sensors, etc., and other terminal processors, and judges whether an input signal is normal or abnormal before the normal process is started if the input signal varies in the sleep state. When it is judged that the signal is normal, the normal process is started, but when it is judged that the signal is abnormal, the sleep state is immediately entered. Consequently, the circuit which judges whether or not a signal is a signal for waking up the device need not have an oscillation circuit, so the current consumption in the sleeve state can be suppressed.</p> |
