M48T212VMH View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
M48T212VMH Datasheet PDF : 32 Pages
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M48T212Y, M48T212V
Table 7. TIMEKEEPER® Register Map
Address
D7
D6
D5
D4
Fh
10 Years
Eh
0
0
0
10M
Dh
0
0
10 Date
Ch
0
FT
0
0
Bh
0
0
10 Hours
Ah
0
10 Minutes
9h
ST
10 Seconds
8h
W
R
S
7h
WDS BMB4 BMB3 BMB2
6h
AFE
0
ABE Al 10M
5h
RPT4 RPT5
AI 10 Date
4h
RPT3
0
AI 10 Hour
3h
RPT2
Alarm 10 Minutes
2h
RPT1
Alarm 10 Seconds
1h
1000 Year
0h
WDF
AF
Y
BL
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
D3
D2
D1
D0
Function/Range
BCD Format
Year
Year
00-99
Month
Month
01-12
Date: Day of Month
Date
01-31
0
Day of Week
Day
01-7
Hours (24 Hour Format)
Hours
00-23
Minutes
Min
00-59
Seconds
Sec
00-59
Calibration
Control
BMB1 BMB0 RB1
RB0 Watchdog
Alarm Month
A Month
01-12
Alarm Date
A Date
01-31
Alarm Hour
A Hour
00-23
Alarm Minutes
A Min
00-59
Alarm Seconds
A Sec
00-59
100 Year
Century
00-99
Y
Y
Y
Y
Flag
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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