Datasheet

Bosch Sensortec | BME680 Datasheet
26 | 50
Modifications reserved |Data subject not change without notice | Printed in Germany
Document number: BST-BME680-DS001-00 Revision_1.0_072017
5.3 Register description
5.3.1 General control registers
5.3.1.1 SPI 3 wire interrupt enable – spi_3w_int_en
Register Name
Address
Content<bit position>
Description
ctrl_hum
0x72
spi_3w_int_en <6>
New data interrupt can be enabled if the device is in
SPI 3 wire mode and pi_3w_int_en=1.
The new data interrupt is then indicated on the SDO
pad.
5.3.1.2 SPI 3 wire enable – spi_3w_en
Register Name
Address
Content<bit position>
Description
config
0x75
spi_3w_en<0>
Enable SPI 3 wire mode
5.3.1.3 Mode Selection – mode
The operation modes of the sensor can be controlled by the register mode as specified below.
Register Name
Address
Content<bit position>
Description
ctrl_meas
0x74
mode<1:0>
Select sensor power mode as shown in the following
table
mode<1:0>
Mode
00
Sleep mode
01
Forced mode
5.3.1.4 SPI memory map page selection – spi_mem_page
In SPI mode complete memory page is accessed using page 0 & page 1. Register spi_mem_page is used for page selection.
After power-on, spi_mem_page is in its reset state and page 0(0x00 to 0x7F) will be active. Page1 (0x7F to 0xFF) will be
active on setting spi_mem_page. Please refer Table 15 for better understanding.
Register Name
Address
Content<bit position>
Description
status
0x73(Page 0/1)
spi_mem_page <4>
Selects memory map page in SPI mode