M41T83_12 Datasheet, PDF (26/62 Pages) STMicroelectronics – Serial I2C bus real-time clock (RTC) with battery switchover

Clock operation
M41T82-M41T83
Table 5.
Key to Table 4: M41T83 clock/control register map (32 bytes)
Code
Explanation
0
ABE
A1IE, A2IE
AC0-AC6
ACS
AF1, AF2
AL2E
BL
BMB0-BMB4
CB0, CB1
DC0-DC4
DCS
FT
HT
OF
OUT
OFIE
OTP
RB0-RB2
RPT11-RPT15
RPT21-RPT25
RS0-RS3
SQWE
SRAM/ALM2
ST
TD0, TD1
TE
TF
TI/TP
TIE
WDF
Must be set to zero
Alarm in battery back-up enable bit
Alarm interrupt enable bits
Analog calibration bits
Analog calibration sign bit
Alarm flag
Alarm 2 enable bit
Battery low bit
Watchdog multiplier bits
Century bits
Digital calibration bits
Digital calibration Sign bit
Frequency test bit
Halt update bit
Oscillator fail bit
Output level
Oscillator fail interrupt enable
OTP control bit
Watchdog resolution bits
Alarm 1 repeat mode bits
Alarm 2 repeat mode bits
SQW frequency
Square wave enable
SRAM/alarm 2 bit
Stop bit
Timer frequency bits
Timer enable bit
Timer flag
Timer interrupt or pulse
Timer interrupt enable
Watchdog flag
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Doc ID 12578 Rev 15