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參數(shù)資料
| 型號： | M41T81MY6E |
| 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, PDSO18 |
| 封裝： | 0.300 INCH, LEAD FREE, PLASTIC, SO-18 |
| 文件頁數(shù)： | 3/30頁 |
| 文件大?。?/td> | 432K |
| 代理商： | M41T81MY6E |
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M41T81
WRITE Mode
In this mode the master transmitter transmits to
the M41T81 slave receiver. Bus protocol is shown
in Figure 13., page 11. Following the START con-
dition and slave address, a logic '0' (R/W=0) is
placed on the bus and indicates to the addressed
device that word address “An” will follow and is to
be written to the on-chip address pointer. The data
word to be written to the memory is strobed in next
and the internal address pointer is incremented to
the next address location on the reception of an
acknowledge clock. The M41T81 slave receiver
will send an acknowledge clock to the master
transmitter after it has received the slave address
see Figure 10., page 9 and again after it has re-
ceived the word address and each data byte.
Data Retention Mode
With valid VCC applied, the M41T81 can be ac-
cessed as described above with READ or WRITE
Cycles. Should the supply voltage decay, the pow-
er input will be switched from the VCC pin to the
battery when VCC falls below the Battery Back-up
Switchover Voltage (VSO). At this time the clock
registers will be maintained by the attached bat-
tery supply. On power-up, when VCC returns to a
nominal value, write protection continues for trec.
For a further, more detailed review of lifetime cal-
culations, please see Application Note AN1012.
Figure 13. WRITE Mode Sequence
AI00591
BUS ACTIVITY:
ACK
S
ACK
STOP
START
P
SDA LINE
BUS ACTIVITY:
MASTER
R/W
DATA n
DATA n+1
DATA n+X
WORD
ADDRESS (An)
SLAVE
ADDRESS
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M41T81MY6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial Access Real-Time Clock with Alarms |
| M41T81S | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial access real-time clock with alarms |
| M41T81S_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial access real-time clock with alarms |
| M41T81S_12 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial access real-time clock (RTC) with alarms |
| M41T81SM6E | 功能描述:實時時鐘 2.0-5.5V 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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