Data Sheet

BNO055
Data sheet
Page 101
BST-BNO055-DS000-14 | Revision 1.4 | June 2016 Bosch Sensortec
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Note: Specifications within this document are subject to change without notice.
5.5 XOUT32 & XIN32 Connections
The BNO055 can run from an internal or external 32 KHz clock source. By default, the
internal clock is selected.
An External clock can be selected by setting bit CLK_SEL in the SYSTEM_TRIGGER
register. An external 32 KHz crystal oscillator has to be connected to the pins XIN32 and
XOUT32 as shown below.
To get the best performance out of BNO055, it is recommended to use the external crystal.
5.5.1 External 32kHz Crystal Oscillator
Figure 12 : External 32kHz Crystal Oscillator with Load Capacitor
Table 5-2: Crystal Oscillator Source Connections
Pin Name
Recommended Pin Connection
Description
XIN32
Load capacitor 22pF
89
Timer oscillator input
XOUT32
Load capacitor 22pF
89
Timer oscillator output
5.5.2 Internal clock mode
The internal clock can be selected by clearing bit CLK_SEL in the SYSTEM_TRIGGER
register. When an internal clock is used, both pins XIN32 and XOUT32 can be left open. The
internal clock of the BNO055 can have clock deviation up to +3%
8
These values are given only as typical example.
9
Decoupling capacitor should be placed close to the device for each supply pin pair in the signal group.