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M41ST84WMQ 数据表(PDF) 20 Page - STMicroelectronics

部件名 M41ST84WMQ
功能描述  5.0 or 3.0V, 512 bit 64 x 8 SERIAL RTC with SUPERVISORY FUNCTIONS
PDF  31 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

M41ST84WMQ 数据表(HTML) 20 Page - STMicroelectronics

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M41ST84Y, M41ST84W
20/31
Square Wave Output
The M41ST84Y/W offers the user a programma-
ble square wave function which is output on the
SQW pin. The RS3-RS0 Bits located in 13h estab-
lish the square wave output frequency. These fre-
quencies are listed in Table 11. 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.
Table 11. Square Wave Output Frequency
Square Wave Bits
Square Wave
RS3
RS2
RS1
RS0
Frequency
Units
0
000
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
110
512
Hz
0
111
256
Hz
1
000
128
Hz
1
001
64
Hz
1
010
32
Hz
1
011
16
Hz
1
1008
Hz
1
1014
Hz
1
1102
Hz
1
1111
Hz



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