? 超低功耗(典型值400nA@3.6V)
? 實時時鐘(12時制或者24時制兩種計時方式)
? 自動識別閏年、平年(2000~2099)
? BCD碼表示的時鐘計數(包括時、分、秒)
和萬年歷(包括閏年、平年、月、日、
周)
? 30秒數字校時功能
?可控的32.768KHz(或者32KHz)輸出
? 兩個可編程鬧鐘輸出
? 兩路可編程方波輸出,為CPU提供多種中斷
(一個月至一秒的周期性中斷)
? 通過I2C兩線接口與CPU相連(最大數據時鐘頻率為100KHz)
? 晶振停振檢測鎖存功能保證了時鐘數據有效性
? 32KHz和32.768KHz晶振選擇
? 高精度的時間調整電路,保證了時鐘走時的精確
? 超低電壓工作(計時電壓最低可至1.8V,通訊電壓最低可至1.8V)
? SOP8或TSSOP8封裝

? 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
