Features
■Provides Year, Month, Day, Weekday, Hours,
Minutes and Seconds Information
■Century Flag
■Wide Operating Voltage: 1.8V to 5.5V
■Low Power Consumption: 0.25μA at VDD = 3.0 V
■ I2C-bus Interface
■Programmable Clock Output (32.768 kHz, 1024
Hz, 32 Hz and 1 Hz)
■Alarm and Timer Functions
■Built-in Power Voltage Detecting Circuit
■ I2C -bus Slave Address: Read A3H and Write A2H
■Open-Drain Interrupt Pin
Applications
■Cash Register
■Security Access Controller, Door Controller
■Time Recorder
■Mobile Telephones
■Public Phone Bill Meter, Smart Card Payphone
■MP3/MP4 Player
■ IC Water-Flow Meter, IC Gas Meter

General Description
The HYM8563 is a CMOS real time clock/calendar,
which provides seconds, minutes, hours, day, date,
month, and year information. The number of days in
each month and leap years are automatically
adjusted. The clock can operate in two modes: one
is the 12-hour mode with an AM/PM indicator，the
other is the 24-hour mode. The clock/calendar is full
binary-coded decimal (BCD). In addition, the
HYM8563 contains a programmable clock output, a
timer, an alarm, a voltage-low detector. All address
and data are transferred serially via I2C bus and The
HYM8563 operates as a slave device on the serial
bus. The built-in word address register is
incremented automatically after each written or read
data byte. The HYM8563 is designed to operate on
very low power consumption.