m41t64 STMicroelectronics, m41t64 Datasheet - Page 17

• Manufacturer Part Number: m41t64
• Description: Serial Access Real-time Clock With Alarms
• Manufacturer: STMicroelectronics

Table 6. M41T65 Register Map
Keys: 0 = Must be set to '0'
Addr
0Ah
0Bh
0Ch
0Dh
0Eh
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Fh
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
RPT4
RPT3
RPT2
RPT1
OFIE
WDF
OUT
CB1
RB2
AFE
D7
ST
0
0
0
BMB4
RPT5
CB0
0.1 Seconds
D6
FT
AF
0
0
0
0
0
10 Years
Alarm 10 Seconds
Alarm 10 Minutes
10 Seconds
10 Minutes
BMB3
D5
S
0
0
0
0
AI 10 Hour
AI 10 Date
10 Hours
10 Date
Al 10M
BMB2
10M
D4
0
0
BMB1
D3
0
0
Hours (24 Hour Format)
Calibration
Date: Day of Month
BMB0
Alarm Seconds
Alarm Minutes
0.01 Seconds
OF
D2
Alarm Month
Alarm Hour
Alarm Date
Seconds
Minutes
Month
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)
Year
Day of Week
RB1
D1
0
RB0
D0
0
10ths/100ths
of Seconds
Function/Range BCD
Calibration
Watchdog
Seconds
Al Month
Century/
Minutes
Al Hour
Al Date
Al Sec
Month
Al Min
M41T62/63/64/65
Hours
Date
Flags
Year
Day
Format
0-3/01-12
00-99
00-59
00-59
00-23
01-31
00-99
01-12
01-31
00-23
00-59
00-59
01-7
17/33