Datasheet

Data Sheet
BMA456
Page 115
BST-BMA456-DS000-01 | Version 1.1 | October 2017 Bosch Sensortec
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Note: Specifications within this document are subject to change without notice.
7. Pin-out and Connection Diagrams
7.1. Pin-out
Pin description
Pin#
Name
I/O Type
Description
Connect to
in SPI 4W
In SPI 3W
in I²C
1
SDO
Digital I/O
Serial data output in SPI
Address select in I²C mode
see chapter 7.2
SDO
DNC (float)
GND for default I2C
addr.
2
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
SDI
SDA
SDA
3
VDDIO
Supply
Digital I/O supply voltage (1.2V
… 3.6V)
V
DDIO
V
DDIO
V
DDIO
4
ASDA
Digital I/O
Serial data I/O – Secondary
Interface (I²C Master for
Magnetometer)
VDDIO/
GNDIO/NC or
(ASDA -
Secondary
interface)
VDDIO/
GNDIO/NC or
(ASDA -
Secondary
interface)
VDDIO/ GNDIO/NC
or
(ASDA - Secondary
interface)
5
INT1
Digital I/O
Interrupt output 1 (default)
(Input for external FIFO sync) *
INT1
(FIFO sync)
INT1
(FIFO sync)
INT1
(FIFO sync)
6
INT2
Digital I/O
Interrupt output 2 (default)
(Input for external FIFO sync) *
INT2
(FIFO sync)
INT2
(FIFO sync)
INT2
(FIFO sync)
7
VDD
Supply
Power supply for analog & digital
domain (1.62V … 3.6V)
V
DD
V
DD
V
DD
8
GNDIO
Ground
Ground for I/O
GND
GND
GND
9
GND
Ground
Ground for digital & analog
GND
GND
GND
10
CSB
Digital in
Chip select for SPI mode
CSB
CSB
V
DDIO
or DNC (float)
11
ASCL
Digital out
Digital clock (out) – Secondary
Interface (I²C Master for
Magnetometer)
VDDIO/
GNDIO/NC or
(ASCL -
Secondary
interface)
VDDIO/
GNDIO/ NC or
(ASCL -
Secondary
interface)
VDDIO/ GNDIO/
NC or (ASCL -
Secondary
interface)
12
SCX
Digital in
SCK for SPI serial clock
SCL for I²C serial clock
SCK
SCK
SCL
* INT1 and/or INT2 can also be configured as an input in case the external data synchronization in FIFO is used. See chapter 4.5. If INT1
and/or INT2 are not used, please do not connect them (DNC).
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