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M41TC8025AMC5F датащи(PDF) 14 Page - STMicroelectronics

номер детали M41TC8025AMC5F
подробное описание детали  Highly accurate, temperature-compensated serial real-time clock (RTC) with embedded crystal
PDF  41 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41TC8025AMC5F датащи(HTML) 14 Page - STMicroelectronics

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Operation
M41TC8025
14/41
DocID022873 Rev 4
Note:
1
After the initial power-up or when the VLF bit is read as "1", the user must initialize all the
registers before using the RTC.
2
Date and time data should be configured in the correct format. Clock operations are not
guaranteed if the data is incorrect.
3
Only "0" can be written to the Test, UF, TF, AF, VLF or VDET bits.
4
Any bit marked with "0" should be written as "0" after initialization and the value read from
these bits are all "0".
5
Any bit marked with "x" is a RAM bit and the data written/read will not affect RTC function.
6
The test bit is only for testing by the manufacturer. The user must write 0 to TEST bit.
Table 4. Register map and default values
Address
Function
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
00h
Seconds
0
40
20
10
8
4
2
1
01h
Minutes
0
40
20
10
8
4
2
1
02h
Hours
0
0
20
10
8
4
2
1
03h
Day-of-week
0
6
5
4
3
2
1
0
04h
Date (day of month)
0
0
20
10
8
4
2
1
05h
Month
0
0
0
10
8
4
2
1
06h
Year
80
40
20
10
8
4
2
1
07h
RAM
x
x
x
xxxx
x
08h
Alarm minutes
(default)
AM_M
(1)
40
20
10
8
4
2
1
09h
Alarm hours
(default)
AM_H
(1)
x
20
10
842
1
0Ah
Alarm day
(default)
AM_D
(1)
6
5
4321
0
Alarm date
(default)
x
20
10
842
1
0Bh
Timer counter 0
128
64
32
16
8
4
2
1
0Ch
Timer counter 1
x
x
x
x
2048
1024
512
256
0Dh
Extension register
(default)
Test
(0)
WADA
(0)
USEL
(0)
TE
(0)
FSEL1
(0)
FSEL0
(0)
TSEL1
(0)
TSEL0
(0)
0Eh
Flag register
(default)
00
UF
(0)
TF
(0)
AF
(0)
0
VLF
(1)
VDET
(1)
0Fh
Control register
(default)
CSEL1
(0)
CSEL0
(1)
UIE
(0)
TIE
(0)
AIE
(0)
00
RESET
(0)
Obsolete
Product(s)
- Obsolete
Product(s)



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