介绍怎样利用Motorola单片机设计和实现一款低成本的可配置型电话计费器。其可配置性保证了该计费器可适应电信局政策费率和时段费率、时钟源、计费基本时间单位(按分计费或按秒计费)和被叫电话区号等多种计费参数的变化 Describes how to use Motorola microcontroller design and implementation of a low-cost configurable telephone meter. Its configurability ensures that the meter can adapt to the bureau policy rates and time rates, the clock source, billing basic unit of time (by sub-billing or second billing) and the called telephone area code and other billing Changes in parameters