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M41T62 Fiches technique(PDF) 6 Page - STMicroelectronics

No de pièce M41T62
Description  Serial real-time clocks (RTCs) with alarm
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41T62 Fiches technique(HTML) 6 Page - STMicroelectronics

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Description
M41T62/63/64/65
6/44
Doc ID 10397 Rev 19
1
Description
The M41T6x is a low-power serial real-time clock (RTC) with a built-in 32.768 kHz oscillator.
Eight registers 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, 32 KHz
output, calibration, and watchdog functions. Addresses and data are transferred serially via
a two line, bidirectional 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), 32 KHz output (M41T62/63/64), 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 two very small packages: a tiny, 3 mm x 3 mm 16-pin QFN which
requires a user-supplied 32 KHz crystal, and an ultra-small 1.5 mm x 3.2 mm LCC with
embedded crystal - no external crystal is required.
Figure 1.
M41T62 logic diagram
1.
Open drain.
2.
Defaults to 32 KHz on power-up.
3.
Not bonded on LCC package.
SCL
VCC
M41T62
VSS
SDA
IRQ/OUT
(1)
SQW
(2)
XI
(3)
XO
(3)
AI09103


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