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BMX160 Datasheet(HTML) 92 Page - Bosch Sensortec GmbH

Part No. BMX160
Description  Small, low power 9-axis sensor
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Maker  BOSCH [Bosch Sensortec GmbH]
Homepage  https://www.bosch-sensortec.com
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BMX160 Datasheet(HTML) 92 Page - Bosch Sensortec GmbH

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BMX160
Data sheet
Page 92
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.
3. Digital interfaces
By default, the BMX160 operates in I2C mode. The BMX160 interface can also be configured to
operate in a SPI 4-wire configuration. It can be re-configured by software to work in 3-wire mode
instead of 4-wire mode.
All 3 possible digital interfaces share partly the same pins (see Chapter 4). The mapping for the
interface of the BMX160 is given in the following table:
Table 30: Mapping of the interface pins
Pin#
Name
I/O Type
Description
Connect to
in
SPI4W
in
SPI3
W
in I2C
1
SDO
Digital
I/O
Serial data output in SPI
Address select in I2C mode
MISO
DNC
(float)
SA0
(GND for
default
addr.)
4
INT1
Digital
I/O
Interrupt pin 1 *)
INT1
INT1
INT1
9
INT2
Digital
I/O
Interrupt pin 2 *)
INT2
INT2
INT2
12
CSB
Digital in
Chip select for SPI mode / Protocol
selection pin
CSB
CSB
VDDIO
13
SCx
Digital in
SCK for SPI serial clock
SCL for I²C serial clock
SCK
SCK
SCL
14
SDx
Digital
I/O
SDA serial data I/O in I2C
SDI serial data input in SPI 4W
SDA serial data I/O in SPI 3W
MOSI
SISO
SDA
The following table shows the electrical specifications of the interface pins:
Table 31: Electrical specification of the interface pins
Parameter
Symbol
Condition
Min
Typ
Max
Units
Pull-up Resistance,
CSB pin
Rup
Internal Pull-up
Resistance to
VDDIO
75
100
150
k
Input Capacitance
Cin
5
pF
I²C Bus Load
Capacitance (max.
drive capability)
CI2C_Load
400
pF


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