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M48T201Y 数据表(PDF) 18 Page - STMicroelectronics

部件名 M48T201Y
功能描述  5.0 or 3.3 V TIMEKEEPER® supervisor
PDF  37 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

M48T201Y 数据表(HTML) 18 Page - STMicroelectronics

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Clock operation
M48T201Y, M48T201V
18/37
Note:
It is not necessary to set the WRITE bit when setting or resetting the FREQUENCY TEST
bit (FT) or the STOP bit (ST).
Table 5.
TIMEKEEPER® register map
Keys:
S = Sign bit
FT = Frequency test bit
R = READ bit
W = WRITE bit
ST = Stop bit
0 = Must be set to '0'
WDS = Watchdog steering bit
AF = Alarm flag
BL = Battery low flag
SQWE = Square wave enable bit
BMB0-BMB4 = Watchdog multiplier bits
RB0-RB1 = Watchdog resolution bits
AFE = Alarm flag enable flag
ABE = Alarm in battery backup mode enable bit
RPT1-RPT5 = Alarm repeat mode bits
WDF = Watchdog flag
RS0-RS3 = SQW frequency
Address
Data
Function/range
BCD format
D7
D6
D5
D4
D3
D2
D1
D0
7FFFFh
10 years
Year
Year
00-99
7FFFEh
0
0
0
10 M
Month
Month
01-12
7FFFDh
0
0
10 date
Date: Day of month
Date
01-31
7FFFCh
0
FT
0
0
0
Day
Day
01-07
7FFFBh
0
0
10 hours
Hours (24-hour format)
Hours
00-23
7FFFAh
0
10 minutes
Minutes
Minutes
00-59
7FFF9h
ST
10 seconds
Seconds
Seconds
00-59
7FFF8h
W
R
S
Calibration
Control
7FFF7h
WDS
BMB4
BMB3
BMB2
BMB1
BMB0
RB1
RB0
Watchdog
7FFF6h
AFE
SQWE
ABE
Al.10M
Alarm month
Al. month
01-12
7FFF5h
RPT4
RPT5
Al. 10 date
Alarm date
Al. date
01-31
7FFF4h
RPT3
0
Al. 10 hours
Alarm hours
Al. hours
00-23
7FFF3h
RPT2
Alarm 10 minutes
Alarm minutes
Al. minutes
00-59
7FFF2h
RPT1
Alarm 10 seconds
Alarm seconds
Al. seconds
00-59
7FFF1h
1000 years
100 years
Century
00-99
7FFF0h
WDF
AF
0
BL
RS3
RS2
RS1
RS0
Flags



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