DS1302 是美国DALLAS公司推出的一种高性能、低功耗、带RAM的实时时钟电路，它可以对年、月、日、周日、时、分、秒进行计时，具有闰年补偿功能-DALLAS DS1302 is an American company launched a high-performance, low-power, real-time clock with RAM circuit, it can year, month, day, weekday, hours, minutes, seconds chronograph, with leap year compensation