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AS3722 데이터시트(PDF) 79 Page - ams-OSRAM AG

부품명 AS3722
상세설명  Multi-Phase DCDC Controller PMIC
PDF  199 Pages
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제조업체  AMSOSRAM [ams-OSRAM AG]
홈페이지  https://ams-osram.com/
Logo AMSOSRAM - ams-OSRAM AG

AS3722 데이터시트(HTML) 79 Page - ams-OSRAM AG

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Page 78
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[v1-01] 2015-Sep-07
AS3722 − Detailed Descriptions- System Functions
to the host controller via the serial interface. Any subsequent
read access to the RTCyear register will enable the update of
the parallel register again. This mechanism makes sure that the
maximum error of the value that is written to or read from the
registers is 1 second.
With the rtc_lock bit in OTP, the write access to the RTC registers
can be locked and only be eabled by writing a “magic” word to
the appropriate address.
To start the RTC, rtc_on bit has to be set to 1.
The RTC stops automatically at its highest value to prevent
overrun.
Alarm
The RTC module includes an alarm function. When the content
of the RTCAlarm registers equals the content of the RTC
registers bit rtc_alarm will be set in the interrupt register.
Furthermore the RTC module can generate a repeating
interrupt every second, every minute, every 2 minutes or every
8 minutes.
To avoid ambiguous behavior during write access to the
RTCAlarm registers any write access to the RTCAlarmSecond
register will disable the alarm function; any subsequent write
access to the RTCAlarmyear will enable the alarm function
again.



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