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M41T94 Fiches technique(PDF) 28 Page - STMicroelectronics

No de pièce M41T94
Description  Serial Real Time Clock with 44Bytes NVRAM and Reset
PDF  40 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41T94 Fiches technique(HTML) 28 Page - STMicroelectronics

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Clock operations
M41T94
28/40
4.13
Initial power-on defaults
Upon initial application of power to the device, the following register bits are set to a '0' state:
Watchdog register, TR, FT, AFE, ABE, and SQWE. The following bits are set to a '1' state:
ST, OUT, and HT (see Table 9: Default values).
Table 8.
tREC definitions
tREC bit (TR)
STOP bit (ST)
tREC time
Units
Min
Max
00
96
98
ms
01
40
200(1)
1.
Default Setting
ms
1
X
50
2000
µs
Table 9.
Default values
Condition
TR
ST
HT
Out
FT
AFE
ABE
SQWE
WATCHDOG
register(1)
1.
BMB0-BMB4, RB0, RB1.
Initial power-up
(battery attach for
SNAPHAT)(2)
2.
State of other Control bits undefined.
01
1100
0
0
0
Subsequent power-up
(with battery back-up)(3)
3.
UC = Unchanged
UC
UC
1
UC
0
0
0
0
0



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