BME690 datasheet(49/60 Pages) BOSCH

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Bosch Sensortec | BME690 - Datasheet

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Document number: BST-BME690-DS001-04

as well as in the event of applications for industrial property rights

SPI read

Reading is done by lowering CSB and first sending one control byte. The control bytes consist of the SPI register

address (= full register address without bit 7) and the read command (bit 7 = 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. The

SPI read protocol is depicted in Picture 11.

Start RW

Stop

bit15 bit14

bit13

bit12 bit11 bit10

bit9

bit8

bit7

bit6

bit5

bit4

bit3

bit2

bit1

bit0

CSB

Data byte

Data register - address F7h

CSB

Control byte

Data byte

Data register - address F6h

Picture 11: SPI multiple byte read

6.4 Interface parameter specification

General interface parameters

Table 23: Interface parameters

Parameter

Symbol

Condition

Min Typ

Max Unit

Input low level

Vil_si

VDDIO=1.2 V to 3. 6V

%VDDIO

Input high level

Vih_si

VDDIO=1.2 V to 3.6 V

%VDDIO

Output low level I2C

Vol_SDI

VDDIO=1.62 V, Iol=3 mA

%VDDIO

Output low level I2C

Vol_SDI_1.2

VDDIO=1.20 V, Iol=3 mA

%VDDIO

Output low level SPI

Vol_SDO

VDDIO=1.62 V, Iol=1 mA

%VDDIO

Output low level SPI

Vol_SDO_1.2

VDDIO=1.20 V, Iol=1 mA

%VDDIO

Output high level

Voh

VDDIO=1.62 V, Ioh=1 mA (SDO, SDI)

%VDDIO

Output high level

Voh_1.2

VDDIO=1.20 V, Ioh=1 mA (SDO, SDI)

%VDDIO

Pull-up resistor

Rpull

Internal CSB pull-up resistor to VDDIO

120

190

kΩ

I2C bus load capacitor Cb

On SDI and SCK

400

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