ML51/ML54/ML56
Sep. 01, 2020
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Manual
6.18 Real Time Clock (RTC)
6.18.1 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.
6.18.2 Features
Supports real time counter and calendar counter for RTC time and calendar check.
Supports alarm time and calendar settings
Supports alarm time and calendar mask enable settings.
Selectable 12-hour or 24-hour time scale setting.
Supports Leap Year indication setting.
Supports Day of the Week counter setting.
Frequency of RTC clock source compensate by RTCFREQADJ0/1 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.
