介绍一种利用I2C实时时钟芯片HYM8563产生的多种中断方式,唤醒进入掉电状态的80C51系列单片机，由此技术构建的低功耗单片机系统。 　　The low consumption system of 80C51 series SCM, which was waked up by interrupts of real time clock chip HYM8563 when it had entered l ose electric state, was introduced in this