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參數(shù)資料
| 型號： | M41T81M6F |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時鐘/數(shù)據(jù)恢復(fù)及定時提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| 封裝： | 0.150 INCH, LEAD FREE, PLASTIC, SOIC-8 |
| 文件頁數(shù)： | 10/29頁 |
| 文件大?。?/td> | 454K |
| 代理商： | M41T81M6F |
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Clock operation
M41T81
Doc ID 7529 Rev 10
3.6
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 4. Once the selection of the SQW frequency has been
completed, the IRQ/FT/OUT/SQW pin can be turned on and off under software control with
the square wave enable bit (SQWE) located in register 0Ah.
3.7
Century bit
Bits D7 and D6 of clock register 03h contain the CENTURY ENABLE bit (CEB) and the
CENTURY bit (CB). Setting CEB to a '1' will cause CB to toggle, either from a '0' to '1' or
from '1' to '0' at the turn of the century (depending upon its initial state). If CEB is set to a '0,'
CB will not toggle.
Table 4.
Square wave output frequency
Square wave bits
Square wave
RS3
RS2
RS1
RS0
Frequency
Units
0000
None
-
0001
32.768
kHz
0010
8.192
kHz
0011
4.096
kHz
0100
2.048
kHz
0101
1.024
kHz
0110
512
Hz
0111
256
Hz
1000
128
Hz
1001
64
Hz
1010
32
Hz
1011
16
Hz
11008
Hz
11014
Hz
11102
Hz
11111
Hz
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| M41T81MY6TR | 1 TIMER(S), REAL TIME CLOCK, PDSO18 |
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| M41T81SM6F | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| M41T81SM6E | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| M41T82RMY6E | 1 TIMER(S), REAL TIME CLOCK, PDSO18 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| M41T81M6F-CUT TAPE | 制造商:ST 功能描述:M41T Series 2 V Serial I2C Real Time Clock with Alarm - SOIC-8 |
| M41T81M6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial Access Real-Time Clock with Alarms |
| M41T81MX | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SERIAL ACCESS RTC WITH ALARMS |
| M41T81MX6 | 功能描述:實時時鐘 Serial 512 (64x8) RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| M41T81MX6TR | 功能描述:實時時鐘 Serial 512 (64x8) RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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