This part is a kind of semiconductor called HYM8563S.

Function of this product has I2C Real Time Clock/Calendar.

Manufacturers : Haoyu

Image and pinout :

Some of the text within the PDF file :

HYM8563 I C Real Time Clock/Calendar 2 HYM8563 Data Sheet 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 ■ I C-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 ■ I C -bus Slave Address: Read A3H and Write A2H ■ Open-Drain Interrupt Pin 2 2 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 1 [ ... ]

HYM8563S PDF Datasheet Download