M48T129YCS View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
M48T129YCS Datasheet PDF : 22 Pages
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M48T129Y, M48T129V
Table 11. TIMEKEEPER Register Map
Data
Address
D7
D6
D5
D4
D3
D2
D1
D0
1FFFFh
10 Years
Year
1FFFEh
0
0
0 10 M.
Month
1FFFDh 0
0
10 Date
Date
1FFFCh 0
FT
0
0
0
Day of Week
1FFFBh
0
0
10 Hours
Hours (24 Hours Format)
1FFFAh
0
10 Minutes
Minutes
1FFF9h ST
10 Seconds
Seconds
1FFF8h W
R
S
Calibration
1FFF7h WDS BMB4 BMB3 BMB2 BMB1 BMB0 RB1 RB0
1FFF6h AFE
0
ABE Al 10M
Alarm Month
1FFF5h RPT4 RPT5 Al 10 Date
Alarm Date
1FFF4h RPT3 0
Al 10 Hours
Alarm Hours
1FFF3h RPT2
Alarm 10 Minutes
Alarm Minutes
1FFF2h RPT1
Alarm 10 Seconds
Alarm Seconds
1FFF1h
1000 Year
100 Year
1FFF0h WDF AF
0
BL
Y
Y
Y
Y
Function/Rang e
BCD Format
Year
Month
Date
Day
Hour
Minutes
Seconds
Control
Watchdog
A Month
A Date
A Hours
A Minutes
A Seconds
Century
Flags
00-99
01-12
01-31
01-07
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 zero
Y = ’1’ or ’0’
BL = Battery Low
AF = Alarm Flag
WDS = Watchdog Steering Bit
BMB0-BMB4 = Watchdog Multiplier Bits
RB0-RB1 = Watchdog Resolution Bits
AFE = Alarm Flag Enable
ABE = Alarm in Battery Back-up Mode Enable
RPT1-RPT5 = Alarm Repeat Mode Bits
WDF = Watchdog Flag
Figure 11. Calibration Waveform
NORMAL
POSITIVE
CALIBRATION
NEGATIVE
CALIBRATION
AI00594B
13/22
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