M41T62 datasheet(38/42 Pages) STMICROELECTRONICS

38 / 42 page

Contents

Description ........................................................................2

Operation..........................................................................7

2.1

2-wire bus characteristics........................................................ 7

2.1.1

Bus not busy ............................................................ 7

2.1.2

Start data transfer ........................................................ 7

2.1.3

Stop data transfer ........................................................ 7

2.1.4

Data valid .............................................................. 7

2.1.5

Acknowledge............................................................ 7

2.2

READ mode ................................................................... 8

2.3

WRITE mode .................................................................. 9

Clock operation...................................................................11

3.1

RTC registers................................................................. 11

3.2

Calibrating the clock ........................................................... 16

3.3

Setting alarm clock registers .................................................... 17

3.4

Watchdog timer ............................................................... 18

3.5

Watchdog output (WDO - M41T65 only) .......................................... 18

3.6

Square wave output (M41T62/64)................................................ 19

3.7

Full-time 32 KHz square wave output (M41T64) .................................... 19

3.8

Century bits .................................................................. 20

3.9

Leap year .................................................................... 20

3.10

Output driver pin (M41T62/65)................................................... 20

3.11

Oscillator stop detection ........................................................ 20

3.12

Initial power-on defaults ........................................................ 21

Maximum ratings .................................................................22

DC and AC parameters ...........................................................23

Package information..............................................................27

6.1

QFN16 package information .................................................... 27

6.2

LCC8 package information...................................................... 30

Packing information ..............................................................33

M41T62, M41T64, M41T65

Contents

DS3840 - Rev 24

page 38/42

M41T62 数据表(PDF) 38 Page - STMicroelectronics

M41T62 数据表(HTML) 38 Page - STMicroelectronics

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