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M41T81S датащи(PDF) 12 Page - STMicroelectronics

номер детали M41T81S
подробное описание детали  Serial Access Real-Time Clock with Alarms
PDF  29 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41T81S датащи(HTML) 12 Page - STMicroelectronics

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Table 2. TIMEKEEPER® Register Map
Keys: 0 = Must be set to '0'
ABE = Alarm in Battery Back-up Mode Enable Bit
AF = Alarm Flag (Read only)
AFE = Alarm Flag Enable Flag
BL = Battery Low Bit
BMB0-BMB4 = Watchdog Multiplier Bits
CB = Century Bit
CEB = Century Enable Bit
FT = Frequency Test Bit
HT = Halt Update Bit
OF = Oscillator Fail Flag
OFIE = Oscillator Fail Interrupt Enable
OUT = Output level
RB0-RB1 = Watchdog Resolution Bits
RPT1-RPT5 = Alarm Repeat Mode Bits
RS0-RS3 = SQW Frequency
S = Sign Bit
SQWE = Square Wave Enable
ST = Stop Bit
WDF = Watchdog Flag (Read only)
Addr
Function/Range BCD
Format
D7
D6
D5
D4
D3
D2
D1
D0
00h
0.1 Seconds
0.01 Seconds
Seconds
00-99
01h
ST
10 Seconds
Seconds
Seconds
00-59
02h
0
10 Minutes
Minutes
Minutes
00-59
03h
CEB
CB
10 Hours
Hours (24 Hour Format)
Century/
Hours
0-1/00-23
04h
0
0
0
0
0
Day of Week
Day
01-7
05h
0
0
10 Date
Date: Day of Month
Date
01-31
06h
0
0
0
10M
Month
Month
01-12
07h
10 Years
Year
Year
00-99
08h
OUT
FT
S
Calibration
Calibration
09h
OFIE
BMB4
BMB3
BMB2
BMB1
BMB0
RB1
RB0
Watchdog
0Ah
AFE
SQWE
ABE
Al 10M
Alarm Month
Al Month
01-12
0Bh
RPT4
RPT5
AI 10 Date
Alarm Date
Al Date
01-31
0Ch
RPT3
HT
AI 10 Hour
Alarm Hour
Al Hour
00-23
0Dh
RPT2
Alarm 10 Minutes
Alarm Minutes
Al Min
00-59
0Eh
RPT1
Alarm 10 Seconds
Alarm Seconds
Al Sec
00-59
0Fh
WDF
AF
0
BL
0
OF
0
0
Flags
10h
000
000
00
Reserved
11h
000
000
00
Reserved
12h
000
000
00
Reserved
13h
RS3
RS2
RS1
RS0
0
0
0
0
SQW



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