M48T212VMH View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
M48T212VMH Datasheet PDF : 35 Pages
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Clock operation
M48T212V
Table 7. TIMEKEEPER® register map
Address
D7 D6 D5
D4
D3 D2 D1 D0
Fh
10 Years
Year
Eh
0
0
0
10M
Month
Dh
0
0
10 date
Date: Day of month
Ch
0
FT
0
0
0
Day of week
Bh
0
0
10 hours
Hours (24 hour format)
Ah
0
10 minutes
Minutes
9h
ST
10 seconds
Seconds
8h
W
R
S
Calibration
7h WDS BMB4 BMB3 BMB2 BMB1 BMB0 RB1 RB0
6h
AFE 0 ABE Al 10M
Alarm month
5h RPT4 RPT5 AI 10 date
Alarm date
4h RPT3 0
AI 10 hour
Alarm hour
3h RPT2 Alarm 10 minutes
Alarm minutes
2h RPT1 Alarm 10 seconds
Alarm seconds
1h
1000 year
100 year
0h
WDF AF
Y
BL
Y
Y
Y
Y
Function/range
BCD format
Year
Month
Date
Day
Hours
Min
Sec
Control
Watchdog
A month
A date
A hour
A min
A sec
Century
Flag
00-99
01-12
01-31
01-7
00-23
00-59
00-59
01-12
01-31
00-23
00-59
00-59
00-99
Keys:
S = Sign bit
FT = Frequency test bit
R = READ bit
W = WRITE bit
ST = Stop bit
0 = Must be set to '0'
BL = Battery low flag (read only)
BMB0-BMB4 = Watchdog multiplier bits
AFE = Alarm flag enable flag
RB0-RB1 = Watchdog resolution bits
WDS = Watchdog steering bit
ABE = Alarm in battery back-up mode enable bit
RPT1-RPT5 = Alarm repeat mode bits
WDF = Watchdog flag (read only)
AF = Alarm flag (read only)
Y = '1' or '0'
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