The DS3231 is an extremely precise, low-cost real-time clock (RTC) with a temperature compensated crystal oscillator (TCXO) and a crystal. RTC stores information relating to seconds, minutes, days, date, month and year. Less than 31 days of the month, the end date will be automatically adjusted, including for the leap year. The clock operates either within 24 hours or in the AM / PM band. 12 hour format indication. Provides two configurable alarm clocks and a calendar that can be set to a square wave output. The address and the data are transferred in series via a bidirectional I2C bus. The device incorporates a very precise digital temperature sensor, which switches between power and power.
