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参数资料
| 型号： | M41T00 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| 封装： | 0.150 INCH, PLASTIC, SO-8 |
| 文件页数： | 14/15页 |
| 文件大小： | 96K |
| 代理商： | M41T00 |
AI00587
DATA
CLOCK
DATA LINE
STABLE
DATA VALID
START
CONDITION
CHANGE OF
DATA ALLOWED
STOP
CONDITION
Figure 6. Serial Bus Data Transfer Sequence
AI00601
DATA OUTPUT
BY RECEIVER
DATA OUTPUT
BY TRANSMITTER
SCLK FROM
MASTER
START
CLOCK PULSE FOR
ACKNOWLEDGEMENT
12
89
MSB
LSB
Figure 7. Acknowledgement Sequence
CLOCK OPERATION
The eight byte clock register (see Table 3) is used
to both set the clock and to read the date and time
from the clock, in a binary coded decimal format.
Seconds, Minutes, and Hours are contained within
the first three registers. Bits D6 and D7 of clock
register 2 (Hours Register) contain the CENTURY
ENABLE Bit (CEB) and the CENTURY Bit (CB).
Setting CEB to a ’1’ will cause CB to toggle, either
from ’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. Bits D0 through D2
of register 3 contain the Day (day of week). Regis-
ters 4, 5 and 6 contain the Date (day of month),
Month and Years. The final register is the Control
Register (this is described in the Clock Calibration
section). Bit D7 of register 0 contains the STOP Bit
(ST). Setting this bit to a ’1’ will cause the oscillator
to stop. If the device is expected to spend a signifi-
cant amount of time on the shelf, the oscillator may
be stopped to reduce current drain. When reset to
a ’0’ the oscillator restarts within one second.
The seven Clock Registers may be read one byte
at a time, or in a sequential block. The Control
Register (Address location 7) may be accessed
independently. Provision has been made to assure
that a clock update does not occur while any of the
seven clock addresses are being read. If a clock
address is being read, an update of the clock
registers will be delayed by 250ms to allow the read
to be completed before the update occurs. This will
prevent a transition of data during the read.
Note: This 250ms delay affects only the clock reg-
ister update and does not alter the actual clock
time.
8/15
M41T00
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M41T00_08 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Serial real-time clock |
| M41T00AUD | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Serial real-time clock with audio |
| M41T00AUD_12 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Serial real-time clock (RTC) with audio |
| M41T00AUDD1E | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Serial real-time clock with audio |
| M41T00AUDD1F | 功能描述:实时时钟 SERIAL RTC W/AUDIO RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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