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參數(shù)資料
| 型號： | M41T83SQA6E |
| 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, QCC16 |
| 封裝： | 4 X 4 MM, ROHS COMPLIANT, QFN-16 |
| 文件頁數(shù)： | 9/61頁 |
| 文件大?。?/td> | 983K |
| 代理商： | M41T83SQA6E |
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M41T82-M41T83
Operation
Doc ID 12578 Rev 12
2.3
Write mode
In this mode the master transmitter transmits to the M41T8x slave receiver. Bus protocol is
shown in Figure 15. 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 M41T8x slave receiver will
send an acknowledge clock to the master transmitter after it has received the slave address
see Figure 12 on page 15 and again after it has received the word address and each data
byte.
Figure 15.
Write mode sequence
As in the case of reading, some registers and memory locations are written directly, but the
RTC counters are written via a set of eight buffer/transfer registers at addresses 00h to 07h.
The user will write the date and time information sequentially, and then, at the end of the I2C
write cycle or when the address pointer increments beyond 07h, the buffer/transfer registers
will be copied into the RTC counters. All the time parameters - fractions, seconds, minutes,
hours, day, date, month, year, and century bits - are copied simultaneously.
Whatever value is in the buffer/transfer registers will be copied to the counters, so if the user
only changes one of the eight bytes, the remaining seven bytes will receive the unchanged
contents of the buffer/transfer registers, which will contain whatever was in the counters at
the start of the write access.
For example, if the user starts a write cycle on Monday, November 16, 2009, at 17:52:27.03,
and writes a 22 to the minutes registers, the value Monday, November 16, 2009,
17:52:22.03 will be written back into the counters. At the start of the write cycle, the eight
bytes of counters were copied into the buffer/transfer registers. Then, the seconds register
was overwritten. Finally, the eight bytes were copied back into the counters with the result
that the seconds value was changed.
AI00591
BUS ACTIVITY:
AC
K
S
AC
K
AC
K
AC
K
AC
K
S
TO
P
S
TA
R
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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PDF描述 |
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| M41T83SQA6F | 1 TIMER(S), REAL TIME CLOCK, QCC16 |
| M41T83RQA6F | 1 TIMER(S), REAL TIME CLOCK, QCC16 |
| M41T83SMY6F | 1 TIMER(S), REAL TIME CLOCK, PDSO18 |
| M41T93ZMY6F | 1 TIMER(S), REAL TIME CLOCK, PDSO18 |
| M41T93ZQA6F | 1 TIMER(S), REAL TIME CLOCK, PQCC16 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M41T83SQA6F | 功能描述:實時時鐘 Serial I2C bus 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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| M41T83ZM6E | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial RTC with battery switchover |
| M41T83ZM6F | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial RTC with battery switchover |
| M41T83ZMY6E | 功能描述:實時時鐘 Serial I2C bus 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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| M41T83ZMY6F | 功能描述:實時時鐘 Serial I2C bus 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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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