基本特征:
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,工作电压为2.5V~5.5V。采用三线接口与CPU进行同步通信,并可采用突发方式一次传送多个字节的时钟信号或RAM数据。DS1302内部有一个31×8的用于临时性存放数据的RAM寄存器。DS1302是DS1202的升级产品,与DS1202兼容,但增加了主电源/后背电源双电源引脚,同时提供了对后背电源进行涓细电流充电的能力。
FEATURES
· Real-time clock (RTC) counts seconds,minutes hours, date of the month, month, day of the week, and year with leap-year compensation valid up to 2100
· 31-byte, battery-backed, nonvolatile (NV) RAM for data storage
· Serial I/O for minimum pin count
· 2.0V to 5.5V full operation
· Uses less than 300nA at 2.0V
· Burst mode for reading/writing successive addresses in clock/RAM
· 8-pin DIP or optional 8-pin SOICs for surfacemount
· Simple 3-wire interface
· TTL-compatible (VCC = 5V)
· Optional industrial temperature range:-40°C to +85°C
· DS1202 compatible
· Underwriters Laboratory (UL) recognized