Information
BMA280
Data sheet
Page 92
BST-BMA280-DS000-11 | Revision 1.8 | August 2014 Bosch Sensortec
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third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.
Register 0x3A (OFC_OFFSET_Z)
Contains the offset compensation value for z-axis acceleration readout data.
Name
0x3A
OFC_OFFSET_Z
Bit
7
6
5
4
Read/Write
R/W
R/W
R/W
R/W
Reset
Value
0
0
0
0
Content
offset_z<7:4>
Bit
3
2
1
0
Read/Write
R/W
R/W
R/W
R/W
Reset
Value
0
0
0
0
Content
offset_z<3:0>
offset_ z<7:0>: offset value, which is subtracted from the internal filtered and unfiltered z-
axis acceleration data; the offset value is represented with two’s complement
notation, with a mapping of +127 +0.992g, 0 0 g, and -128 -1 g; the
scaling is independent of the selected g-range; the content of the
offset_z<7:0> may be written to the NVM; it is automatically restored from
the NVM after each power-on or softreset; offset_z<7:0> may be written
directly by the user; it is generated automatically after triggering the fast
offset compensation procedure for the z-axis
Register 0x3B (TRIM_GP0)
Contains general purpose data register with NVM back-up.
Name
0x3B
TRIM_GP0
Bit
7
6
5
4
Read/Write
R/W
R/W
R/W
R/W
Reset
Value
0
0
0
0
Content
GP0<7:4>
Bit
3
2
1
0
Read/Write
R/W
R/W
R/W
R/W
Reset
Value
0
0
0
0
Content
GP0<3:0>
GP0<7:0>: general purpose NVM image register not linked to any sensor-specific
functionality; register may be written to NVM and is restored after each
power-up or softreset