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M41ST85WMH6 Fiches technique(PDF) 19 Page - STMicroelectronics

No de pièce M41ST85WMH6
Description  3.0/3.3V I2C Combination Serial RTC, NVRAM Supervisor and Microprocessor Supervisor
PDF  34 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41ST85WMH6 Fiches technique(HTML) 19 Page - STMicroelectronics

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M41ST85W
Square Wave Output
The M41ST85W 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 4. Once the selection of the
SQW frequency has been completed, the SQW
pin can be turned on and off under software con-
trol with the Square Wave Enable Bit (SQWE) lo-
cated in Register 0Ah.
Table 4. Square Wave Output Frequency
Square Wave Bits
Square Wave
RS3
RS2
RS1
RS0
Frequency
Units
00
00
None
–
0
0
0
1
32.768
kHz
00
10
8.192
kHz
00
11
4.096
kHz
01
00
2.048
kHz
01
01
1.024
kHz
01
10
512
Hz
01
11
256
Hz
10
00
128
Hz
10
01
64
Hz
10
10
32
Hz
10
11
16
Hz
11
008
Hz
11
014
Hz
11
102
Hz
11
111
Hz



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