? 超低功耗(典型值400nA@3.6V)
? 实时时钟(12时制或者24时制两种计时方式)
? 自动识别闰年、平年(2000~2099)
? BCD码表示的时钟计数(包括时、分、秒)
和万年历(包括闰年、平年、月、日、
周)
? 30秒数字校时功能
?可控的32.768KHz(或者32KHz)输出
? 两个可编程闹钟输出
? 两路可编程方波输出,为CPU提供多种中断
(一个月至一秒的周期性中断)
? 通过I2C两线接口与CPU相连(最大数据时钟频率为100KHz)
? 晶振停振检测锁存功能保证了时钟数据有效性
? 32KHz和32.768KHz晶振选择
? 高精度的时间调整电路,保证了时钟走时的精确
? 超低电压工作(计时电压最低可至1.8V,通讯电压最低可至1.8V)
? SOP8或TSSOP8封装
? Time keeping voltage: 1.3V to 6.0V
? Lowest supply current: 0.5μA Typ. (0.9μA Max.) :
3V (25℃)
(1.0μA Max.) : 3V (-40 to+85℃)
? Connected to the CPU via only 2-wires
(I2C bus Interface, Max.400kHz, address 7bit)
? A clock counter (counting hours, minutes, and seconds)
and a calendar counter (counting leap years, years,
months, and days of the week) in BCD codes
? Interrupt to the CPU (period of one month
to one second, interrupt flag, interrupt
halt
function)( INTRA , INTRB )
? Two systems of alarm functions
(days of the week, hours, and minutes) ( INTRA , INTRB )
? Oscillation halt sensing to judge internal data validity
? Clock output of 32.768kHz (32.000kHz)
(output controllable via a register) ... (Nch. open drain output)
? Second digit adjustment by±30 seconds
? Automatic leap year recognition up to the year 2099
? 12-hour or 24-hour time display selectable
? Oscillator of 32.768kHz or 32.000kHz may be used
? CMOS logic
? Package: 8pin SSOP









