Datasheet
Data Sheet
BMA456
Page 25
BST-BMA456-DS000-01 | Version 1.1 | October 2017 Bosch Sensortec
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BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.
When FIFO_<sensor x>_data is 0b1 (0b0) data for sensor x is included (not included) in the data part
of the frame.
The fh_ext<1:0> field are used for external tagging.
The data format for data frames is identical to the format defined for the Register (0x0A) DATA_0 to
Register (0x17) DATA_13 register. Only frames which contain data of at least one sensor will be written
into the FIFO. E.g. fh_parm=0b0101 the data in the frame are shown below. If the read burst length is
less than 8 byte, the number of auxiliary sensor data in the frame is reduced to the burst length.
DATA[X]
Acronym
X=0
AUX_0
copy of register Val(AUX_RD_ADDR) in auxiliary sensor
register map
X=1
AUX_1
copy of register Val(AUX_RD_ADDR )+1 in auxiliary sensor
register map
X=2
AUX_2
copy of register Val(AUX_RD_ADDR )+2 in auxiliary sensor
register map
X=3
AUX_3
copy of register Val(AUX_RD_ADDR )+3 in auxiliary sensor
register map
X=4
AUX_4
copy of register Val(AUX_RD_ADDR )+4 in auxiliary sensor
register map
X=5
AUX_5
copy of register Val(AUX_RD_ADDR )+5 in auxiliary sensor
register map
X=6
AUX_6
copy of register Val(AUX_RD_ADDR )+6 in auxiliary sensor
register map
X=7
AUX_7
copy of register Val(AUX_RD_ADDR)+7 in auxiliary sensor
register map
X=8
ACC_X<7:0> (LSB)
X=9
ACC_X<15:8> (MSB)
X=10
ACC_Y<7:0> (LSB)
X=11
ACC_Y<15:8> (MSB)
X=12
ACC_Z<7:0> (LSB)
X=13
ACC_Z<15:8> (MSB)
Headerless mode
When the data rates of all enabled sensor elements are identical, the FIFO header may be disabled
in FIFO_CONFIG_1.fifo_header_en.
The headerless mode supports only regular frames. To be able to distinguish frames from each other,
all frames must have the same size. For this reason, any change in configuration that have an impact
to frame size or order of data within a frame will cause an instant flush of FIFO, restarting capturing of
data with the new settings.