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M41TC8025CMC7F 数据表(PDF) 16 Page - STMicroelectronics

部件名 M41TC8025CMC7F
功能描述  Highly accurate, temperature-compensated serial real-time clock (RTC) with embedded crystal
PDF  41 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

M41TC8025CMC7F 数据表(HTML) 16 Page - STMicroelectronics

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Operation
M41TC8025
16/41
DocID022873 Rev 4
Note:
Do not write more than one bit of "1" in the Day-of-week register.
Note:
Writing invalid day-of-week data may interfere with normal operation of the calendar.
The data in the date (day of month), month and year registers are in BCD format. For
example, the date register value "0011 0001" indicates 31st.
The date counter counts from "01" to "02", "03" and up to "31" and rolls over to "01" after
that. The maximum date value varies according to the value in the month register which is
show in Table 8.
Note:
Leap year is whenever the year value is a multiple of four (such as 04, 08, 12…88, 92, or
96). Year 00 is not considered to be a leap year.
The month counter counts from "01" to "02", "03" and up to "12" and it rolls over to "01" after
that. It represents: January, February… and December.
The year counter counts from "00" to "01", "02" and up to "99" and it rolls over to "00" after
that. It may represent: year 2000, 2001… and 2099. Any year that is a multiple of four (04,
08, 12… 88, 92, 96, etc.) is automatically handled as a leap year. Year 00 is not considered
to be a leap year.
2.4.3
Clock reset function
Table 7. Data for day-of-week
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Data [h]
Day-of-week
0
0
0
0
0
0
0
1
01h
Sunday
0
0
0
0
0
0
1
0
02h
Monday
0
0
0
0
0
1
0
0
04h
Tuesday
0
0
0
0
1
0
0
0
08h
Wednesday
0
0
0
1
0
0
0
0
10h
Thursday
0
0
1
0
0
0
0
0
20h
Friday
0
1
0
0
0
0
0
0
40h
Saturday
Table 8. Data for date (day of month) register
Month value
Data for date (day of month) register
1, 3, 5, 7, 8, 10 or 12
01
02…310102…
4, 6, 9 or 11
01
02…300102…
February in normal year
01
02…280102…
February in leap year
01
02…290102…
Table 9. Reset bit in control register 0Fh
Address
Function
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0Fh
Control register CSEL1 CSEL0
UIE
TIE
AIE
0
0
RESET
Obsolete
Product(s)
- Obsolete
Product(s)



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