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M41T62 Datasheet(PDF) 5 Page - STMicroelectronics

Part No. M41T62
Description  Serial Access Real-Time Clock with Alarms
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41T62 Datasheet(HTML) 5 Page - STMicroelectronics

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M41T62/63/64/65
Summary description
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1
Summary description
The M41T6x Serial Access TIMEKEEPER® is a low power Serial RTC with a built-in 32.768
kHz oscillator (external crystal controlled). Eight registers (see Table 3 on page 19) are used
for the clock/calendar function and are configured in binary coded decimal (BCD) format. An
additional 8 registers provide status/control of Alarm, 32KHz output, Calibration, and
Watchdog functions. Addresses and data are transferred serially via a two line, bi-directional
I2C interface. The built-in address register is incremented automatically after each WRITE or
READ data byte.
Functions available to the user include a time-of-day clock/calendar, Alarm interrupts
(M41T62/65), 32KHz output (M41T64), programmable Square Wave output
(M41T62/63/64), and Watchdog output (M41T63/65). The eight clock address locations
contain the century, year, month, date, day, hour, minute, second and tenths/hundredths of a
second in 24 hour BCD format. Corrections for 28-, 29- (leap year), 30- and 31-day months
are made automatically.
The M41T6x is supplied in a 16-pin QFN.
Figure 1.
M41T62 logic diagram
1.
Open drain.
2.
Defaults to 32KHz on power-up.
SCL
VCC
M41T62
VSS
SDA
IRQ/OUT
(1)
SQW
(2)
XI
XO
AI09103


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