M41T94(2003) 查看數據表（PDF） - STMicroelectronics
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M41T94 Datasheet PDF : 31 Pages
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M41T94
Square Wave Output
The M41T94 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 12. 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 12. Square Wave Output Frequency
Square Wave Bits
RS3
RS2
RS1
0
0
0
0
0
0
0
0
1
0
0
1
0
1
0
0
1
0
0
1
1
0
1
1
1
0
0
1
0
0
1
0
1
1
0
1
1
1
0
1
1
0
1
1
1
1
1
1
Square Wave
RS0
Frequency
Units
0
None
–
1
32.768
kHz
0
8.192
kHz
1
4.096
kHz
0
2.048
kHz
1
1.024
kHz
0
512
Hz
1
256
Hz
0
128
Hz
1
64
Hz
0
32
Hz
1
16
Hz
0
8
Hz
1
4
Hz
0
2
Hz
1
1
Hz
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