FEATURES
 Built in 32.768kHz crystal unit, The oscillation frequency is adjusted to high precision (05ppm: at 25C)
 Time keeping voltage 1.15V to 5.5V
 Super low power consumption 0.48A TYP (1.2A MAX) at VDD=3V
 Four signal lines (CE, SCLK, SI, and SO) required for connection to the CPU.
 Time counters (counting hours, minutes, and seconds) and calendar counters (counting years, months, days,
and weeks) (in BCD format)
 Interrupt circuit configured to generate interrupt signals (with interrupts ranging from 0.5 seconds to 1 month)
to the CPU and provided with an interrupt flag and an interrupt halt
 2 alarm interrupt circuits (Alarm_W for week, hour, and minute alarm settings and Alarm_D for hour and minute
alarm settings)
 32768Hz clock output pin (N-channel open drain output)
 With Power-on flag to prove that the power supply starts from 0V
 With Oscillation halt sensing Flag to judge the validity of internal data
 Supply voltage monitoring circuit with two supply voltage monitoring threshold settings
 Automatic identification of leap years up to the year 2099
 Selectable 12-hour and 24-hour mode settings
 Oscillation adjustment circuit for correcting temperature frequency deviation or offset deviation
 CMOS process
 Two types of package, SOP14(10.1x7.4x3.1) or SON22(6.1x5.0x1.3)