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AN3133 Datasheet(PDF) 35 Page - STMicroelectronics

Part # AN3133
Description  A real-time clock is a computer clock that keeps track of the current time
PDF  43 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3133 Datasheet(HTML) 35 Page - STMicroelectronics

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AN3133
Application examples
Doc ID 16956 Rev 5
35/43
Figure 20.
RTC Tamper ISR flowchart
Figure 21.
EXTI ISR flowchart for UP button
RTC Tamper1 Interrupt Routine
When exit from Halt mode,
show Tamper 1
detection duration.
ExTamper_03
Return to Main program
LED3 ON
LED3 OFF
Print “Tamper 1 occurs” on LCD
Clear Tamper 1 flag (IT pending bit)
Enter Halt mode
UP button ISR interrupt
ExTamper_04
Is configured Tamper Filter maximal?
No
Yes
Return to Main program
Select the next
Preconfigured Tamper
Filter
Print on LCD the Current Tamper Filter
Clear Interrupt Pending bit



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