L9679E datasheet(121/127 Pages) STMICROELECTRONICS

121 / 127 page

Contents

Absolute maximum ratings ........................................................2

Operative maximum ratings........................................................5

Pins description ...................................................................8

Overview and block diagram .......................................................9

4.1

Deployment drivers ............................................................ 10

4.2

Remote sensor interfaces ...................................................... 10

4.3

Arming logic .................................................................. 10

4.4

Other features ................................................................ 10

Start-up and power control .......................................................11

5.1

Power supply overview......................................................... 11

5.2

Power mode control ........................................................... 11

5.2.1

Power-off mode......................................................... 12

5.2.2

Awake mode ........................................................... 12

5.2.3

Active mode ........................................................... 12

5.2.4

Power-up and power-down sequences ....................................... 12

5.2.5

IC operating states ...................................................... 14

5.3

Oscillators ................................................................... 15

5.4

Reset control ................................................................. 15

SPI interface......................................................................17

6.1

SPI protocol .................................................................. 17

6.2

Global SPI register map ........................................................ 17

6.3

Global SPI tables.............................................................. 26

6.3.1

Global SPI global status word .............................................. 26

6.4

Global SPI read/write registers .................................................. 27

FLTSR ....................................................................... 27

SYS_CFG .................................................................... 28

SYS_CTL..................................................................... 30

SPI_Soft_Reset ................................................................ 31

SYS_STATE................................................................... 32

POWER_STATE ............................................................... 33

DCR_x(x=0, 2, 4, 6) ............................................................. 34

DCR_x(x=1, 3, 5, 7) ............................................................. 35

DEPCOM ..................................................................... 36

DSR_x (x=0 to 7) ............................................................... 37

DCMTSxy (xy=01,23,45,67)....................................................... 38

L9679E

Contents

DS12485 - Rev 8

page 121/127

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