參數(shù)資料
型號(hào)： M41T81MY6TR
廠商： 意法半導(dǎo)體
英文描述： SERIAL ACCESS RTC WITH ALARMS
中文描述： 串行訪問(wèn)時(shí)鐘用鬧鐘
文件頁(yè)數(shù)： 20/28頁(yè)
文件大小： 386K
代理商： M41T81MY6TR
M41T81
20/28
Square Wave Output
The M41T81 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 IRQ/FT/
OUT/SQW pin can be turned on and off under soft-
ware control with the Square Wave Enable Bit
(SQWE) located in Register 0Ah.
Table 12. 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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