A SPI write is carried out by setting CSB low and sending a control byte followed by register data. The control

byte consist of the SPI register address ( full register address without bit 7) and the write command ( bit7 = RW =

'0'). Setting CSB high ends the transaction. The SPI write protocol is described in the diagram below.

A SPI read is initiated by setting CSB low and sending a single control byte. The control byte consist of the SPI

register address ( = full register address without bit 7) and the read command ( bit7 = RW = '1'). After writing the

control byte, data is sent out of the SDO pin ( SDI in 3-wire mode); the register address is automatically

incremented. Sending CSB high ends the SPI read transaction. The SPI read protocol is shown in the diagram

below:

Figure 14 SPI write, read protocol diagrams

6.3

Interface parameters specification

DPS310 - Digital Pressure Sensor

Digital Barometric Pressure Sensor for Portable Devices

Digital interfaces

21

V1.0

2016-09-05