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M41ST85WMH 数据表(PDF) 19 Page - STMicroelectronics

部件名 M41ST85WMH
功能描述  5.0 OR 3.0V, 512 bit 64 x 8 SERIAL RTC and NVRAM SUPERVISOR
PDF  34 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

M41ST85WMH 数据表(HTML) 19 Page - STMicroelectronics

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M41ST85Y, M41ST85W
Square Wave Output
The M41ST85Y/W offers the user a programma-
ble square wave function which is output on the
SQW pin. RS3-RS0 bits located in 13h establish
the square wave output frequency. These fre-
quencies 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
control with the Square Wave Enable Bit (SQWE)
located 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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