The clock chip is one of the most widely used consumer electronic products in daily life. It provides people with accurate real-time time, can be year, month, day, Sunday, hour, minute, second time, and has a leap year compensation and other functions; Or to provide accurate time reference for electronic systems, most of the current real-time clock chips use high precision crystal oscillator as the clock source. The real-time Clock is short for Real_Time Clock (RTC). RTC is an integrated circuit, commonly known as a clock chip.