基于DS3231的高精度时钟接口设计

Extremely accurate real-time clock interface design based on DS3231

为避免电路系统在上电或断电后出现计时不准确的异常状况,提出采用高精度时钟芯片DS3231的解决方案。介绍DS3231的特点、工作原理以及引脚功能,设计其与微控制器进行通信时的软件、硬件接口,并给出相应的原理图与流程图,此方案对DS3231在一般的电路系统设计中具有通用性。由于DS3231是目前精度最高,并集成有温补振荡器和晶体的实时时钟芯片,因此该方案对那些对计时精度要求极高的应用具有一定的借鉴意义。

To avoid some abnormal condition when the circuit system is electrified or out of power,so we give a solution which uses high precision RTC DS3231.The paper introduces the characteristics,operation principle and the pin function of DS3231 ,and designs the hardware and soft interface, through which DS3231 communicates with MCU.It also offers correlative electrical schematic diagram and flowchart.This way has universality in the general sysytem.Beeause the DS3231 is the most accurate real-time clock chip with a termperature-compensated crystal osillator and a crystal in the world,so this way possesses certain reference significance.