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AN3133 데이터시트(PDF) 40 Page - STMicroelectronics

부품명 AN3133
상세설명  A real-time clock is a computer clock that keeps track of the current time
PDF  43 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3133 데이터시트(HTML) 40 Page - STMicroelectronics

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Application examples
AN3133
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Doc ID 16956 Rev 5
Figure 27.
EXTI ISR flowchart for SEL button
Note:
PauseStatus is a status variable used to save the last operation: Pause or Running. It is
initialized to “RESET” with means running.
SEL button ISR interrupt
Clear Interrupt Pending bit
ExChrono_04
PauseStatus == RESET?
Yes
No
Return to Main program
LED2 ON
LED1 OFF
Disable RTC clock
Print Pause message
on LCD “SEL to Run”
PauseStatus = Not(PauseStatus)
LED2 OFF
LED1 ON
Enable RTC clock
Print Resume message
on LCD “Chrono running”



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