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BMX160 Datasheet(HTML) 100 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) 100 Page - Bosch Sensortec GmbH

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BMX160
Data sheet
Page 100
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.
Example of an I²C read access (reading gyro data):
Start
RW ACKS
ACKS
1
1
0
1
0
0
0
0
X
0
0
0
1
1
0
0
Start
RW ACKS
ACKM
ACKM
1
1
0
1
0
0
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
ACKM
ACKM
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
ACKM
NACK
Stop
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
S
Slave Adress
Register adress (0x02)
Sr
Slave Adress
Read Data (0x02)
Control byte
Data byte
Data byte
Read Data (0x03)
Data byte
Data byte
Read Data (0x04)
Read Data (0x05)
P
Data byte
Data byte
Read Data (0x06)
Read Data (0x07)
Figure 29: I²C multiple read
3.4 SPI and I²C Access Restrictions
In order to allow for the correct internal synchronization of data written to the BMX160, certain
access restrictions apply for consecutive write accesses or a write/read sequence through the
SPI as well as I2C interface. The required waiting period depends on whether the device is
operating in normal mode or other modes.
As illustrated in the figure below, an interface idle time of at least 2 µs is required following a write
operation when the device operates in normal mode. In suspend mode an interface idle time of
least 450 µs is required14.
Figure 30: Post-write access timing constraints
14 The times are preliminary and need to be verified.
X-after-Write
Register Update Period
(> 2us / 450us)
Write-Operation
X-Operation


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