| 摘要 |
<p>PURPOSE:To reduce consumption power, by lengthening intervals for working a receiving means or the like for receiving previously set informations intermittently, every lapse of a fixed time, on the specified time of a time measuring means for measuring a time from the OFF of an engine key. CONSTITUTION:The receiver 3 of a keyless entry system is provided with a CPU 31 controlling with a built-in ROM, a timer circuit 32 for measuring a time from engine OFF and starting the CPU 31 every fixed time, a switching circuit 33, and the like. After the lapse of a fixed time from the time of starting, by the timer 32, interruption is generated on the CPU 31, and in case of no receiving signal inspecting timing, the same time is set on the timer 32. In case of the lapse of a specified or longer time on the timer 32, a new time longer than a previous time is set on the timer 32 to start a device, and intervals for working a receiving means and the like intermittently are lengthened. Accordingly, consumption power can be saved.</p> |
