M4T32-BR12SHX STMICROELECTRONICS [STMicroelectronics], M4T32-BR12SHX Datasheet - Page 28

• Manufacturer Part Number: M4T32-BR12SHX
• Description: Serial real-time clock with 44 bytes NVRAM and reset
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

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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 8.
1. Default setting
Table 9.
1. BMB0-BMB4, RB0, RB1.
2. State of other control bits undefined.
3. UC = Unchanged
Initial power-up
(battery attach for
SNAPHAT)
Subsequent power-up
(with battery back-up)
t
REC
Condition
bit (TR)
0
0
1
(2)
t
Default values
REC
definitions
(3)
Table 9: Default
STOP bit (ST)
UC
TR
0
X
0
1
UC
ST
1
values).
HT
1
1
Out
UC
1
Min
96
40
50
FT
0
0
t
REC
AFE
0
0
time
ABE SQWE
0
0
200
2000
Max
98
(1)
0
0
WATCHDOG
register
Units
0
0
ms
ms
µs
(1)