L9965P datasheet(99/104 Pages) STMICROELECTRONICS

99 / 104 page

Contents

Block diagram and pin description .................................................3

1.1

Block diagram ................................................................. 3

1.2

Pin description ................................................................. 4

Product ratings ....................................................................6

2.1

Thermal ratings ................................................................ 6

2.2

Electrical ratings ............................................................... 6

2.2.1

Absolute maximum ratings ................................................. 8

2.3

ESD ratings ................................................................... 9

Functional description ............................................................10

3.1

Device functional states (FSM) .................................................. 10

3.1.1

SPI SLEEP commands ................................................... 12

3.1.2

Diagnostics summary .................................................... 12

3.2

Power management ........................................................... 12

3.2.1

Power management electrical parameters .................................... 12

3.3

Power supply section .......................................................... 14

3.3.1

Main supply (ERBST) .................................................... 14

3.3.2

Power stage supply (PS).................................................. 18

3.3.3

IO output buffer supply (VIO) .............................................. 18

3.4

Wake-up sources ............................................................. 19

3.4.1

Wake-up from cyclic wake-up pin (CWUP) .................................... 19

3.4.2

Wake-up from fire enable inputs (FENH/FENL)................................. 20

3.4.3

Wake-up via peripheral SPI................................................ 21

3.5

Fault notification (FAULTN) ..................................................... 22

3.5.1

FAULTN integrity check................................................... 22

3.5.2

FAULTN electrical parameters.............................................. 24

3.6

Pyro-fuse deployment stage .................................................... 25

3.6.1

Signal stage (FENH/FENL/SPI) ............................................ 26

3.6.2

Power stage (PS/PF/PR/PGND) ............................................ 34

3.7

Diagnostic routine ............................................................. 39

3.7.1

Routine execution modes ................................................. 39

3.7.2

Routine steps .......................................................... 40

3.7.3

Diagnostic routine electrical parameters ...................................... 55

3.8

Voltage ADC ................................................................. 57

3.8.1

Measurement trigger modes ............................................... 58

3.8.2

Voltage ADC electrical parameters .......................................... 59

L9965P

Contents

DS14702 - Rev 4

page 99/104

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