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BMX160 Datasheet(HTML) 24 Page - Bosch Sensortec GmbH

Part No. BMX160
Description  Small, low power 9-axis sensor
Download  113 Pages
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Maker  BOSCH [Bosch Sensortec GmbH]
Homepage  https://www.bosch-sensortec.com
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BMX160 Datasheet(HTML) 24 Page - Bosch Sensortec GmbH

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BMX160
Data sheet
Page 24
BST-BMX160-DS000-12 | Revision 1.2 | January 2019
Bosch Sensortec
© Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third
parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Note: Specifications within this document are preliminary and
subject to change without notice.
For reads, the number of data bytes defined in mag_rd_burst in register MAG_IF[0]<0:1> are read
from the magnetometer and written into the MAG_[X-Z] and RHALL fields of the register DATA.
For write accesses, no burst write is supported, independent of the settings in mag_rd_burst in
Register (0x4C-0x4F) MAG_IF.
When a read or write operation is triggered by writing to MAG_IF[1] or MAG_IF[2], a bit indicator
mag_man_op in
Register (0x1B) STATUS is set and when the operation is completed it is automatically reset.
The time delay between triggering a magnetometer measurement and reading the measured data
is specified in mag_offset in MAG_IF[0].
The data rate used for the autonomous reading of the magnetometer data in Data mode should
be first specified by configuring the mag_odr in Register (0x44) MAG_CONF<0:3>.
For a read access:
Write magnetometer register address to read from into Register (0x4D) MAG_IF[1]
Read
Register (0x1B) STATUS until the bit mag_man_op is “0”
Read Register (0x04-0x0B) DATA_0 to DATA_7, get the data from magnetometer
 For a write access:
Write the write data into Register (0x4F) MAG_IF[3]
Write magnetometer register address to write into Register (0x4E) MAG_IF[2]
Read
Register (0x1B) STATUS until the bit mag_man_op is “0” to confirm the write access
has been completed
Before changing from Setup mode to Data mode, set register MAG_IF[1-3] to the following values:
Register
Value
MAG_IF[3]
0x02
MAG_IF[2]
0x4C
MAG_IF[1]
0x42
2.4.3.1.2 Data Mode
The data mode is enabled by setting the MAG_IF_1<7>= 0. When data mode is enabled and
magnetometer interface is in low power mode or normal mode, the force mode of the
magnetometer is autonomously triggered. Data ready status is set via drdy_mag in
Register (0x1B) STATUS, but this operation never clears drdy_mag, it is typically cleared through
reading the Register (0x04-0x17) DATA. If DRDY is not active the error bit mag_drdy_err in
Register (0x02) ERR_REG is set.


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