SPSB100 datasheet(203/213 Pages) STMICROELECTRONICS

203 / 213 page

4.17

Safety checks ................................................................ 55

4.18

NVM integrity monitor .......................................................... 55

Serial peripheral interface (SPI) ...................................................56

5.1

ST-SPI ...................................................................... 56

5.1.1

Physical Layer.......................................................... 57

5.2

Signal description ............................................................. 57

5.2.1

Clock and data characteristics ............................................. 57

5.2.2

Communication protocol .................................................. 58

5.2.3

Address definition ....................................................... 61

Functional safety concept ........................................................65

6.1

Safety requirements ........................................................... 65

6.1.1

MCU in RUN mode ...................................................... 65

6.1.2

MCU in Smart-Power mode ............................................... 66

6.1.3

MCU in Stand-by mode................................................... 67

6.2

Safety mechanisms............................................................ 68

Electrical characteristics..........................................................69

7.1

Supply monitoring ............................................................. 69

7.2

Power ground loss monitoring ................................................... 70

7.3

Oscillator .................................................................... 71

7.4

Power-on reset ............................................................... 71

7.5

LDO1 voltage regulator ........................................................ 71

7.6

LDO2 voltage regulator ........................................................ 72

7.7

Boost controller ............................................................... 72

7.8

BUCK1 converter ............................................................. 75

7.9

BUCK2 converter ............................................................. 77

7.10

BUCK3 converter ............................................................. 86

7.11

Watchdog .................................................................... 91

7.12

High side output OUT_HS ...................................................... 94

7.13

NFSO1 fail safe output ......................................................... 95

7.14

Wake up inputs (WU, IGN)...................................................... 95

7.15

SPI ......................................................................... 97

7.16

SWDBG input ...............................................................101

7.17

ADC characteristics ..........................................................102

7.18

IRQ interrupt ................................................................102

7.19

FIN1 input...................................................................103

7.20

Timer.......................................................................103

SPSB100

Contents

DS14640 - Rev 2

page 203/213

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