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参数资料
| 型号： | M41T81SMY6T |
| 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, PDSO18 |
| 封装： | 0.300 INCH, LEAD FREE, PLASTIC, SOIC-18 |
| 文件页数： | 5/32页 |
| 文件大小： | 524K |
| 代理商： | M41T81SMY6T |
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M41T81S
Operation
Doc ID 10773 Rev 6
WRITE mode
In this mode the master transmitter transmits to the M41T81S slave receiver. Bus protocol is
shown in Figure 10 on page 13. Following the START condition 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 M41T81S slave receiver
will send an acknowledge clock to the master transmitter after it has received the slave
address see Figure 7 on page 12 and again after it has received the word address and each
data byte.
Data retention mode
With valid VCC applied, the M41T81S can be accessed as described above with READ or
WRITE cycles. Should the supply voltage decay, the power input will be switched from the
VCC pin to the battery when VCC falls below the battery backup switchover voltage (VSO). At
this time the clock registers will be maintained by the attached battery supply. On power-up,
when VCC returns to a nominal value, write protection continues for tREC.
For a further, more detailed review of lifetime calculations, please see application note
AN1012.
Figure 10.
WRITE mode sequence
AI00591
BUS ACTIVITY:
AC
K
S
AC
K
AC
K
AC
K
AC
K
ST
OP
ST
AR
T
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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相关代理商/技术参数 |
参数描述 |
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| M41T82 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Serial I2C bus RTC with battery switchover |
| M41T82_08 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Serial I2C bus RTC with battery switchover |
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| M41T82RM6E | 功能描述:实时时钟 Serial I2C bus RTC W/ battry switchover 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 |
| M41T82RM6F | 功能描述:实时时钟 Serial I2C bus RTC 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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