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參數(shù)資料
| 型號： | M41T81MQ6TR |
| 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, PDSO16 |
| 封裝： | PLASTIC, SOIC-16 |
| 文件頁數(shù)： | 4/28頁 |
| 文件大小： | 179K |
| 代理商： | M41T81MQ6TR |
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M41T81
12/28
Read Mode
In this mode the master reads the M41T81 slave
after setting the slave address (see Figure 11,
page 13). Following the write mode control bit (R/
W=0) and the acknowledge bit, the word address
‘An’ is written to the on-chip address pointer. Next
the START condition and slave address are re-
peated followed by the READ mode control bit (R/
W=1).
At this point the master transmitter be-
comes the master receiver. The data byte which
was addressed will be transmitted and the master
receiver will send an acknowledge bit to the slave
transmitter.
The address pointer is only incre-
mented on reception of an acknowledge bit. The
M41T81 slave transmitter will now place the data
byte at address An+1 on the bus, the master re-
ceiver reads and acknowledges the new byte and
the address pointer is incremented to “An+2.”
This cycle of reading consecutive addresses will
continue until the master receiver sends a STOP
condition to the slave transmitter.
The system-to-user transfer of clock data will be
halted whenever the address being read is a clock
address (00h to 07h). The update will resume ei-
ther due to a Stop Condition or when the pointer
increments to a RAM address.
An alternate READ mode may also be implement-
ed whereby the master reads the M41T81 slave
without first writing to the (volatile) address point-
er. The first address that is read is the last one
stored in the pointer (see Figure 12, page 13).
Write Mode
In this mode the master transmitter transmits to
the M41T81 slave receiver. Bus protocol is shown
in Figure 13, page 13. 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 increment-
ed to the next memory location within the RAM 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 8, page 10) and
again after it has received the word address and
each data byte.
Figure 10. Slave Address Location
AI00602
R/W
SLAVE ADDRESS
START
A
0
100
0
11
MSB
LSB
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| M44C092-H | 4-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO20 |
| M44C892-H | 4-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO20 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(shí)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(shí)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 |
| M41T81MY | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SERIAL ACCESS RTC WITH ALARMS |
| M41T81MY6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial Access Real-Time Clock with Alarms |
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