NuMicro® NUC029LEE/NUC029SEE
32-bit Arm
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Cortex
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-M0 Microcontroller
Aug, 2018
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6.12 Real Time Clock (RTC)
6.12.1 Overview
The Real Time Clock (RTC) controller provides the real time and calendar message. The RTC
offers programmable time tick and alarm match interrupts. The data format of time and calendar
messages are expressed in BCD format. A digital frequency compensation feature is available to
compensate external crystal oscillator frequency accuracy.
The RTC controller also offers 80 bytes spare registers
to store user’s important information.
6.12.2 Features
Supports real time counter in Time Loading Register (TLR) (hour, minute, second)
and calendar counter in Calendar Loading Register (CLR) (year, month, day) for RTC
time and calendar check
Supports alarm time (hour, minute, second) and calendar (year, month, day) settings
in Time Alarm Register (TAR) and Calendar Alarm Register (CAR) register
Selectable 12-hour or 24-hour time scale in Time Scale Selection Register (TSSR)
register
Supports Leap Year indication in Leap Year Indicator Register (LIR) register
Supports Day of the Week counter in Day of the Week Register (DWR) register
Frequency of RTC clock source compensate by RTC Frequency Compensation
Register (FCR) register
All time and calendar message expressed in BCD format
Supports periodic RTC Time Tick interrupt with 8 period interval options 1/128, 1/64,
1/32, 1/16, 1/8, 1/4, 1/2 and 1 second
Supports RTC Time Tick and Alarm Match interrupt
Supports chip wake-up from Idle or Power-down mode while a RTC interrupt signal is
generated
Supports 80 bytes spare registers