M41T65 STMICROELECTRONICS [STMicroelectronics], M41T65 Datasheet - Page 23

• Manufacturer Part Number: M41T65
• Description: Serial real-time clocks with alarm
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

M41T62/63/64/65
Table 6.
Keys:
0 = must be set to '0'
AF = alarm flag (read only)
AFE = alarm flag enable flag
BMB0 - BMB4 = watchdog multiplier bits
CB0-CB1 = century bits
FT = frequency test bit
OF = oscillator fail bit
OFIE = oscillator fail interrupt enable bit
OUT = output level
RB0 - RB2 = watchdog resolution bits
RPT1-RPT5 = alarm repeat mode bits
S = sign bit
ST = stop bit
WDF = watchdog flag bit (read only)
Addr
0Ch
0Dh
0Ah
0Bh
0Eh
0Fh
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
RPT4
RPT3
RPT2
RPT1
OFIE
WDF
OUT
CB1
RB2
AFE
D7
ST
0
0
0
M41T65 register map
BMB4
RPT5
CB0
D6
0.1 seconds
FT
AF
0
0
0
0
0
Alarm 10 seconds
Alarm 10 minutes
10 years
10 seconds
10 minutes
BMB3
D5
S
0
0
0
0
AI 10 date
AI 10 hour
10 hours
10 date
Doc ID 10397 Rev 14
Al 10M
BMB2
10M
D4
0
0
BMB1 BMB0
D3
0
0
Hours (24-hour format)
Calibration
Date: day of month
Alarm seconds
Alarm minutes
0.01 seconds
Alarm month
Alarm date
Alarm hour
OF
D2
Seconds
Minutes
Month
Day of week
Year
RB1
D1
0
RB0
D0
0
10ths/100ths
of seconds
Calibration
Watchdog
Function/range BCD
Seconds
Al month
Century/
Minutes
Al hour
Al date
month
Al min
Al sec
Hours
Date
Flags
Year
Day
Clock operation
format
0-3/01-12
00-59
00-59
01-31
00-59
00-99
00-23
01-31
00-99
01-12
00-23
00-59
01-7
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