M41T82 datasheet(41/58 Pages) STMICROELECTRONICS

Part #	M41T82

Description	Serial RTC with battery switchover

PDF	58 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

41 / 58 page

M41T82 M41T83

Clock operation

41/58

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

0000

None

–

0001

32.768

kHz

0010

8.192

kHz

0011

4.096

kHz

0100

2.048

kHz

0101

1.024

kHz

0110

512

0111

256

1000

128

1001

1010

1011

11008

11014

11102

11111

M41T82 Datasheet(PDF) 41 Page - STMicroelectronics

M41T82 Datasheet(HTML) 41 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58

Datasheet Download

Link URL