DS1307 Real Time Clock
The DS1307 serial real-time clock (RTC) is a low-power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes
of NV SRAM. Address and data are transferred serially through an I²C, bidirectional bus. The clock/calendar provides
seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted
for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or
12-hour format with AM/PM indicator. The DS1307 has a built-in power-sense circuit that detects power failures and automatically switches to the backup supply. Timekeeping operation continues while the part operates from the
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