基于数字集成电路自顶向下的设计方法设计了一种新型的可编程高精度串行实时时钟芯片,可以输入不同的编程配置信息并精确计时.介绍了芯片的内部结构框图,给出了主要模块的设计方法.芯片采用I2C双线串行总线接口,具有计时、日历、报警、涓流充电等功能,可广泛应用于实际数字钟产品中. Based on the top-down design method of digital integrated circuit, a new type of programmable high-precision serial real-time clock chip is designed, which can input different programming configuration information and accurately time-count.The internal structure block diagram of the chip is introduced, Module design method.The chip uses I2C dual-wire serial bus interface, with timing, calendar, alarm, trickle charge and other functions, can be widely used in the actual digital clock products.