RTC module defines a time in your electronics. It’s used to control the scheduled operations in your program for example, to turn something on or off at a specific time.
Integrated RTC IC
Provides year, month, day, weekday, hours, minutes, seconds and 100th seconds based on a 32.768 kHz quartz crystal
Stop-watch mode for elapsed time counting. From 100th seconds to 999999 hours
Two independent alarms
Integrated back-up circuit with Supercapacitor
WatchDog timer
Ultra-Low Shutdown Current (2μA, typ)
Three timestamp registers
Two independent interrupt generators plus predefined interrupts at every second, minute, or hour
I2C Interface
=