Real time clock module, Rtc functionality – Digi NS9215 User Manual
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Real Time Clock Module
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he Real Time Clock (RTC) module tracks the time of the day to an accuracy of
10 milliseconds and provides calendar functionality that tracks day, month, and
year.
RTC functionality
RTC monitors these time periods:
Year from 1900-2999
Month from 1-12
Date from 1-28, 29, 30, or 31, as a function of year and month
Day of week from 1-7
Hour from 0-23, or from 1-12 with the AM/PM flag set
Minute from 0-59
Second from 0.00-59.99
RTC functionality also provides an alarm register that allows comparison of month,
date, hour, minute, second, and hundredth-second. Each item can be masked,
allowing an alarm to be generated at a particular time and date on a monthly basis.
An interrupt can be generated on the alarm event.
Event detection finds and generates interrupts on rollover conditions, including
rollovers into a new month, date, hour, minute, second, or hundredth-second.