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M41T83RM6F 데이터시트(PDF) 41 Page - STMicroelectronics

부품명 M41T83RM6F
상세설명  Serial I2C bus real-time clock (RTC) with battery switchover
PDF  64 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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M41T83RM6F 데이터시트(HTML) 41 Page - STMicroelectronics

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M41T82, M41T83
Clock operation
3.9
Square wave output (M41T83 only)
The M41T83 offers the user a programmable square wave function which is output on the
SQW pin. RS3-RS0 bits located in 13h establish the square wave output frequency. These
frequencies are listed in Table 13. Once the selection of the SQW frequency has been
completed, the SQW pin can be turned on and off under software control with the square
wave enable bit (SQWE) located in register 0Ah.
Note:
If the SQWE bit is set to '1' and VCC falls below the switchover (VSO) voltage, the square
wave output will be disabled.
Table 13. Square wave output frequency
Square wave bits
Square wave
RS3
RS2
RS1
RS0
Frequency
Units
0
0
0
0
None
–
0
0
0
1
32.768
kHz
0
0
1
0
8.192
kHz
0
0
1
1
4.096
kHz
0
1
0
0
2.048
kHz
0
1
0
1
1.024
kHz
0
1
1
0
512
Hz
0
1
1
1
256
Hz
1
0
0
0
128
Hz
1
0
0
1
64
Hz
1
0
1
0
32
Hz
1
0
1
1
16
Hz
1
1
0
0
8
Hz
1
1
0
1
4
Hz
1
1
1
0
2
Hz
1
1
1
1
1
Hz



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