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NUC130-SD3E Datasheet(Fiches technique) 71 Page - Nuvoton Technology Corporation

Numéro de pièce NUC130-SD3E
Description  NuMicro
Télécharger  97 Pages
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Fabricant  NUVOTON [Nuvoton Technology Corporation]
Site Internet  http://www.nuvoton.com
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NuMicro NUC230/240 Datasheet
Dec. 30, 2014
Page 71 of 97
Revision 1.01
6.11 Window Watchdog Timer (WWDT)
6.11.1 Overview
The Window Watchdog Timer is used is to perform a system reset within a specified window
period to prevent software run to uncontrollable status by any unpredictable condition.
6.11.2 Features
6-bit down counter value (WWDTVAL[5:0]) and 6-bit compare window value
(WWDTCR[21:16]) to make the WWDT time-out window period flexible
Supports 4-bit value to programmable maximum 11-bit prescale counter period of
WWDT counter
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




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