Ladybug LB5900 Series Interface Manual page 2

Power sensor, spi & i2c interface

Table of Contents

Electrical Data Connection and Addressing ................................................................................. 21

SPI Message Overview ................................................................................................................. 22

SPI Clock Phase and Polarity .................................................................................................... 22

Sensor SPI Module Reset ......................................................................................................... 22

Data format .............................................................................................................................. 23

Command Header ................................................................................................................ 23

Previous SPI communication status ..................................................................................... 23

Busyness ............................................................................................................................... 24

Busy/Ready .......................................................................................................................... 24

Sensor Status Byte (STB) ...................................................................................................... 25

Measurement Processing Time ........................................................................................... 25

Header Details ...................................................................................................................... 25

Command Header 06h - Read Status & Length ............................................................... 26

Command Header F0h - Write Command ...................................................................... 27

Command Header 0Ch - Read Complete Output Buffer ................................................. 28

Communication Examples ................................................................................................... 29

Measurement Example .................................................................................................... 29

Additional SPI Messaging Example .................................................................................. 32

REVISIONS & UPDATES .................................................................................................................... 33

DOC: SPII2CHDWBrief - V2.71 07/25/2017

PAGE 2

Table of Contents