NBP8 datasheet(58/58 Pages) NXP

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NXP Semiconductors

NBP8

Battery pressure monitor sensor

Contents

General description ............................................ 1

Features and benefits .........................................1

Ordering information .......................................... 1

Block diagram ..................................................... 2

Pinning information ............................................ 3

5.1

Pinning ...............................................................3

5.2

Pin description ................................................... 3

5.3

Application ......................................................... 6

Functional description ........................................7

6.1

Communication between the NBP8 and

external host ......................................................7

6.2

Serial peripheral interface (SPI) module ............8

6.2.1

SPI protocol definition ........................................9

6.2.2

SPI signal timing definition .............................. 11

6.3

Main features ...................................................11

6.4

State-transition diagram ...................................12

6.5

Pressure change detection description ............13

6.5.1

Overview ..........................................................13

6.5.2

Description of the fixed threshold option ..........14

6.5.3

Description of the relative threshold option ......16

6.5.4

Description of the rate of change threshold

option ............................................................... 18

6.5.5

Description of the pressure FIFO .................... 21

6.6

SPI transfer sequence .....................................22

6.6.1

SPI transfer requested by the external host

via the WAKE-UP pin ...................................... 22

6.6.2

SPI transfer requested by the NBP8, when

an event requiring attention occurred .............. 24

6.7

Typical sequence timings ................................ 25

6.7.1

Periodic events ................................................ 25

6.7.2

NBP8 notifying the external host ..................... 26

6.7.3

External host requesting an SPI transfer ......... 27

6.7.4

Summary of execution times ........................... 28

6.8

Read/write targets accessible by the

external host via SPI ....................................... 28

Limiting values ..................................................39

Recommended operating conditions .............. 39

Electrical specifications ................................... 41

9.1

Charge consumptions ......................................41

9.2

Clocks and thresholds ..................................... 41

9.3

Power-on reset operation ................................ 42

9.4

GPIO port pins .................................................42

9.5

SPI timing characteristics ................................ 43

9.6

Temperature measurement characteristics ......44

9.7

Voltage measurement characteristics .............. 44

9.8

Pressure measurement characteristics ............45

9.8.1

Pressure measurement characteristic

(40 kPa to 250 kPa) range .............................. 45

Mechanical specifications ................................45

10.1

Maximum ratings (mechanical) ........................45

10.2

Media compatibility .......................................... 46

Mounting recommendations ............................ 46

Package outline .................................................47

References .........................................................52

Revision history ................................................ 53

Legal information ..............................................54

Please be aware that important notices concerning this document and the product(s)

described herein, have been included in section 'Legal information'.

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

Date of release: 11 March 2022

Document identifier: NBP8

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