M41T64 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
M41T64 Datasheet PDF : 41 Pages
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M41T62/63/64/65
Clock operation
Table 4. M41T63 register map
Addr
Function/range BCD
D7
D6 D5
D4
D3 D2 D1 D0
format
00h
01h ST
0.1 seconds
10 seconds
0.01 seconds
Seconds
10ths/100ths
of seconds
Seconds
00-99
00-59
02h 0
10 minutes
Minutes
Minutes
00-59
03h 0
0
10 hours
Hours (24-hour format)
Hours
00-23
04h RS3 RS2 RS1 RS0
0
Day of week
Day
01-7
05h 0
0
06h CB1 CB0
10 date
0
10M
Date: day of month
Month
Date
Century/
month
01-31
0-3/01-12
07h
08h 0
10 years
0
S
Year
Calibration
Year
Calibration
00-99
09h RB2 BMB4 BMB3 BMB2 BMB1 BMB0 RB1 RB0 Watchdog
0Ah 0 SQWE 0 Al 10M
Alarm month
Al Month 01-12
0Bh RPT4 RPT5 AI 10 date
Alarm date
Al date
01-31
0Ch RPT3
0Dh RPT2
0
AI 10 hour
Alarm 10 minutes
Alarm hour
Alarm minutes
Al hour
Al min
00-23
00-59
0Eh RPT1 Alarm 10 seconds
Alarm seconds
Al sec
00-59
0Fh WDF AF
0
0
0
OF
0
0
Flags
Keys:
0 = must be set to '0'
AF = alarm flag (read only)
BMB0 - BMB4 = watchdog multiplier bits
CB0-CB1 = century bits
OF = oscillator fail bit
RB0 - RB2 = watchdog resolution bits
RPT1-RPT5 = alarm repeat mode bits
RS0-RS3 = SQW frequency bits
S = sign bit
SQWE = square wave enable bit
ST = stop bit
WDF = watchdog flag bit (read only)
Doc ID 10397 Rev 14
21/41
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