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NUC140-LD3C Fiches technique(PDF) 71 Page - Nuvoton Technology Corporation |
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NUC140-LD3C Fiches technique(HTML) 71 Page - Nuvoton Technology Corporation |
71 / 97 page 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 |
Numéro de pièce similaire - NUC140-LD3C |
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Description similaire - NUC140-LD3C |
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