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參數(shù)資料
| 型號： | M41T63Q6F |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時鐘/數(shù)據(jù)恢復及定時提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, QCC16 |
| 封裝： | 3 X 3 MM, LEAD FREE, QFN-16 |
| 文件頁數(shù)： | 21/40頁 |
| 文件大?。?/td> | 707K |
| 代理商： | M41T63Q6F |
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Clock operation
M41T62/63/64/65
Doc ID 10397 Rev 12
3.8
Century bits
These two bits will increment in a binary fashion at the turn of the century, and handle all
leap years correctly. See
Table 10 on page 29 for additional explanation.
3.9
Output driver pin (M41T62/65)
When the OFIE bit, AFE bit, and watchdog register are not set to generate an interrupt, the
IRQ/OUT pin becomes an output driver that reflects the contents of D7 of the calibration
register. In other words, when D7 (OUT Bit) is a '0,' then the IRQ/OUT pin will be driven low.
Note:
The IRQ/OUT pin is an open drain which requires an external pull-up resistor.
3.10
Oscillator stop detection
If the oscillator fail (OF) bit is internally set to a '1,' this indicates that the oscillator has either
stopped, or was stopped for some period of time and can be used to judge the validity of the
clock and date data. This bit will be set to '1' any time the oscillator stops.
In the event the OF bit is found to be set to '1' at any time other than the initial power-up, the
STOP bit (ST) should be written to a '1,' then immediately reset to '0.' This will restart the
oscillator.
The following conditions can cause the OF bit to be set:
●
The first time power is applied (defaults to a '1' on power-up).
Note:
If the OF bit cannot be written to '1' four (4) seconds after the initial power-up, the STOP bit
(ST) should be written to a '1,' then immediately reset to '0.'
●
The voltage present on VCC or battery is insufficient to support oscillation.
●
The ST bit is set to '1.'
●
External interference of the crystal
If the oscillator fail interrupt enable bit (OFIE) is set to a '1,' the IRQ pin will also be
activated. The IRQ output is cleared by resetting the OFIE or OF bit to '0' (NOT by reading
the flag register).
The OF bit will remain set to '1' until written to logic '0.' The oscillator must start and have
run for at least 4 seconds before attempting to reset the OF bit to '0.' If the trigger event
occurs during a power-down condition, this bit will be set correctly.
3.11
Initial power-on defaults
Upon application of power to the device, the register bits will initially power-on in the state
indicated in
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| M41T64 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial Access Real-Time Clock with Alarms |
| M41T64Q6F | 功能描述:實時時鐘 Serial access RTC 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| M41T65 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial Access Real-Time Clock with Alarms |
| M41T65Q6F | 功能描述:實時時鐘 1.3V to 3.6V w/Alarm 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| M41T65Q6F-CUT TAPE | 制造商:ST 功能描述:M41T65 Series 1.3 to 4.4 V Serial I2C Real Time Clock Surface Mount - QFN-16 |
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