This module maintains seconds, minutes, hours, day, date, month, and year information. Less than 31 days of the month, the end date will be automatically adjusted, including corrections for the leap year. The clock operates in either the 24 hours or band / AM / PM indication of the 12-hour format. Provides two configurable alarm clocks and a calendar that can be set to a square wave output. Address and data are transferred serially through an I2C bidirectional bus.

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