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NUC120-VA2E Fiches technique(PDF) 44 Page - Nuvoton Technology Corporation |
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NUC120-VA2E Fiches technique(HTML) 44 Page - Nuvoton Technology Corporation |
44 / 89 page NuMicro ™ NUC120 Data Sheet Publication Release Date: Jan. 2, 2012 - 44 - Revision V2.03 5.8 5.8. RTC is from an external 32.768 kHz low speed crystal connected at pins X32I and z low speed oscillator output econd, minute, hour) in Time onth, year) in Calendar Loading Register (CLR). The data message is expressed in BCD format. It also offers alarm function that user can preset the alarm time in Time Alarm Register (TAR) and alarm calendar in Calendar AR). eriodic Time Tick and Alarm Match interrupts. The periodic interrupt 8, 1/4, 1/2 and 1 second which are selected by an int Time Tick and Alarm Match can cause chip wake- nction is enabled (TWKE (TTR[3])=1). 5.8.2 Alarm register (second, minute, hour, day, month, year) electable tions 1/128, 1/64, 1/32, 1/16, 1/8, 1/4, 1/2 Support RTC Time Tick and Alarm Match interrupt Support wake-up chip from power down mode Real Time Clock (RTC) 1 Overview Real Time Clock (RTC) controller provides user the real time and calendar message. The clock source of X32O (reference to pin descriptions) or from an external 32.768 kH fed at pin X32I. The RTC controller provides the time message (s Loading Register (TLR) as well as calendar message (day, m Alarm Register (C The RTC controller supports p has 8 period options 1/128, 1/64, 1/32, 1/16, 1/ TTR (TTR[2:0]). When RTC counter in TLR and CLR is equal to alarm setting time registers TAR d CAR, the alarm interrupt flag (RIIR.AIF) is set and the alarm interrupt is requested if the alarm errupt is enabled (RIER.AIER=1). Both RTC up from power down mode if wake-up fu Features There is a time counter (second, minute, hour) and calendar counter (day, month, year) for user to check the time 12-hour or 24-hour mode is s Leap year compensation automatically Day of week counter Frequency compensate register (FCR) All time and calendar message is expressed in BCD code Support periodic time tick interrupt with 8 period op and 1 second |
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