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M41T00SM6E Arkusz danych(PDF) 4 Page - STMicroelectronics

Numer części M41T00SM6E
Szczegółowy opis  Serial Access Real-Time Clock
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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M41T00S
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SUMMARY DESCRIPTION
The M41T00S Serial Access TIMEKEEPER®
SRAM is a low power Serial RTC with a built-in
32.768kHz oscillator (external crystal controlled).
Eight bytes of the SRAM (see Table 2., page 11)
are used for the clock/calendar function and are
configured in binary coded decimal (BCD) format.
Addresses and data are transferred serially via a
two line, bi-directional I2C interface. The built-in
address register is incremented automatically af-
ter each WRITE or READ data byte.
The M41T00S has a built-in power sense circuit
which detects power failures and automatically
switches to the battery supply when a power fail-
ure occurs. The energy needed to sustain the
clock operations can be supplied by a small lithium
button supply when a power failure occurs. The
eight clock address locations contain the century,
year, month, date, day, hour, minute, and second
in 24 hour BCD format. Corrections for 28, 29
(leap year - valid until year 2100), 30 and 31 day
months are made automatically.
The M41T00S is supplied in an 8-pin SOIC.
Figure 2. Logic Diagram
Note: 1. For SO8 package only.
Table 1. Signal Names
Note: 1. For SO8 package only.
Figure 3. 8-pin SOIC (M) Connections
Note: 1. Open Drain Output
SCL
VCC
M41T00S
VSS
SDA
FT/OUT
VBAT
XI
(1)
XO
(1)
AI09165
XI(1)
Oscillator Input
XO(1)
Oscillator Output
FT/OUT
Frequency Test / Output Driver
(Open Drain)
SDA
Serial Data Input/Output
SCL
Serial Clock Input
VBAT
Battery Supply Voltage
VCC
Supply Voltage
VSS
Ground
2
3
45
6
8
7
1
FT/OUT
(1)
SDA
VBAT
SCL
VSS
XO
XI
VCC
M41T00S
AI09166


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