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M48T37Y 数据表(PDF) 13 Page - STMicroelectronics

部件名 M48T37Y
功能描述  5.0 or 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER짰 SRAM
PDF  30 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

M48T37Y 数据表(HTML) 13 Page - STMicroelectronics

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M48T37Y, M48T37V
Clock operations
Doc ID 7019 Rev 9
13/30
Table 5.
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'
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 backup mode enable bit
RPT1-RPT4 = Alarm repeat mode bits
WDF = Watchdog flag (read only)
AF = Alarm flag (read only)
Z = '0' and are read only
Address
Data
Function/range
BCD format
D7
D6
D5
D4
D3
D2
D1
D0
7FFFh
10 years
Year
Year
00-99
7FFEh
0
0
0
10 M
Month
Month
01-12
7FFDh
0
0
10 date
Date: Day of month
Date
01-31
7FFCh
0
FT
0
0
0
Day of week
Day
01-7
7FFBh
0
0
10 hours
Hours
Hours
00-23
7FFAh
0
10 minutes
Minutes
Min
00-59
7FF9h
ST
10 seconds
Seconds
Sec
00-59
7FF8h
W
R
S
Calibration
Control
7FF7h
WDS
BMB4
BMB3
BMB2
BMB1 BMB0
RB1
RB0
Watchdog
7FF6h
AFE
0
ABE
0
0
0
0
0
Interrupts
7FF5h
RPT4
0
AIarm 10 date
Alarm date
Alarm date
01-31
7FF4h
RPT3
0
AIarm 10 hours
Alarm hours
Alarm hour
00-23
7FF3h
RPT2
Alarm 10 minutes
Alarm minutes
Alarm min
00-59
7FF2h
RPT1
Alarm 10 seconds
Alarm seconds
Alarm sec
00-59
7FF1h
1000 year
100 year
Century
00-99
7FF0h
WDF
AF
Z
BL
Z
Z
Z
Z
Flags



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