M41T83RMY6F datasheet(41/64 Pages) STMICROELECTRONICS

Il numero della parte	M41T83RMY6F

Spiegazioni elettronici	Serial I2C bus real-time clock (RTC) with battery switchover

PDF	64 Pages

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

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41 / 64 page

DocID012578 Rev 19

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M41T82, M41T83

Clock operation

3.9

Square wave output (M41T83 only)

The M41T83 offers the user a programmable square wave function which is output on the

SQW pin. RS3-RS0 bits located in 13h establish the square wave output frequency. These

frequencies are listed in Table 13. Once the selection of the SQW frequency has been

completed, the SQW pin can be turned on and off under software control with the square

wave enable bit (SQWE) located in register 0Ah.

Note:

If the SQWE bit is set to '1' and VCC falls below the switchover (VSO) voltage, the square

wave output will be disabled.

Table 13. Square wave output frequency

Square wave bits

Square wave

RS3

RS2

RS1

RS0

Frequency

Units

None

–

32.768

kHz

8.192

kHz

4.096

kHz

2.048

kHz

1.024

kHz

512

256

128

M41T83RMY6F Scheda tecnica(PDF) 41 Page - STMicroelectronics