AN923 Datasheet, PDF (1/7 Pages) STMicroelectronics – Managing century information using serial real-time clocks

AN923
Application note
Managing century information using serial real-time clocks and
TIMEKEEPER^® NVRAMs
By Doug Sams
Introduction
ST's serial real-time clocks (RTCs) and TIMEKEEPER^® NVRAMs all include at least one
byte of year data in binary-coded decimal (BCD) format. Many devices include additional
bits for tracking the century, effectively extending the year register. Applications can use
software to further extend the century/year data to any desired resolution. The amount of
software required depends on the resources built into the chip and the resolution needed by
the application.
August 2013
DocID005227 Rev 3
1/7
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