Data Sheet

BNO055
Data sheet
Page 90
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.
4.5 Digital Interface
The BNO055 supports two digital interfaces for communication between the salve and host
device: I
2
C which supports the HID-I2C protocol and I2C Standard and Fast modes; and the
UART interface.
The active interface is selected by the state of the protocol select pins (PS1 and PS0), Table
4-4 shows the mapping between the protocol select pins and the selected interface mode.
Table 4-4: protocol select pin mapping
PS1
PS0
Functionality
0
0
Standard/Fast I2C Interface
0
1
HID over I2C
1
0
UART Interface
1
1
Reserved
It is not allowed to keep the protocol select pins floating.
Both digital interfaces share partially the same pins, the pin mapping for each interface is
shown in Table 4-5.
Table 4-5: Mapping of digital interface pins
PIN
I2C Interfaces
(PS1=0b0)
UART Interface
(PS1.PS0=0b10)
COM0
SDA
Tx
COM1
SCL
Rx
COM2
GNDIO
COM3
I2C address select
The following table shows the electrical specifications of the interface pins:
Table 4-6: Electrical specification of the interface pins
Parameter
Symbol
Condition
Min
Typ
Max
Units
Pull-up Resistance,
COM3 pin
R
up
Internal Pull-up
Resistance to
VDDIO
20
40
60
k
Input Capacitance
C
in
5
10
pF
I²C Bus Load
Capacitance (max.
drive capability)
C
I2C_Load
400
pF