L9961 datasheet(60/63 Pages) STMICROELECTRONICS

60 / 63 page

3.8.1

Data-ready interrupt pin (RDY) ............................................. 36

3.8.2

Fault interrupt pin (FAULTN) ............................................... 36

3.8.3

MCU emergency reset (FAULTN_SAFE) ..................................... 38

3.8.4

Electrical parameters .................................................... 38

3.9

I2C communication interface .................................................... 38

3.9.1

Clock polarity .......................................................... 39

3.9.2

START/STOP conditions.................................................. 39

3.9.3

ACK/NACK ............................................................ 40

3.10

I2C protocol layer ............................................................. 40

3.10.1

Addressing and R/ W bit .................................................. 40

3.10.2

CRC ................................................................. 40

3.10.3

Single read/block read ................................................... 41

3.10.4

Single WRITE/block WRITE ............................................... 41

3.10.5

Electrical parameters .................................................... 42

3.11

Non-volatile memory (NVM)..................................................... 43

3.11.1

Electrical parameters .................................................... 44

Device register map ..............................................................45

Application information ...........................................................46

5.1

Power supply circuit ........................................................... 46

5.2

Cell voltage sensing and balancing circuit ......................................... 47

5.3

Current sense circuit........................................................... 47

5.4

NTC analog front end .......................................................... 48

5.5

HS/LS pre-drivers circuit ....................................................... 49

5.6

Fuse circuit................................................................... 49

5.7

Digital IOs.................................................................... 50

5.8

Charger connection............................................................ 51

5.9

Safety bypass ................................................................ 51

5.9.1

Safety bypass in HS configuration........................................... 52

5.9.2

Safety bypass in LS configuration ........................................... 53

Package information..............................................................54

6.1

VFQFPN (5x5x1.00 mm) package information ..................................... 55

Revision history .......................................................................58

L9961

Contents

DS14012 - Rev 1

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