Information

BMA280
Data sheet
Page 50
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 0x00 (BGW_CHIPID)
The register contains the chip identification code.
Name
0x00
BGW_CHIPID
Bit
7
6
5
4
Read/Write
R
R
R
R
Reset
Value
n/a
n/a
n/a
n/a
Content
chip_id<7:4>
Bit
3
2
1
0
Read/Write
R
R
R
R
Reset
Value
n/a
n/a
n/a
n/a
Content
chip_id<3:0>
chip_id<7:0>: Fixed value b’1111’1011
Register 0x02 (ACCD_X_LSB)
The register contains the least-significant bits of the X-channel acceleration readout value.
When reading out X-channel acceleration values, data consistency is guaranteed if the
ACCD_X_LSB is read out before the ACCD_X_MSB and shadow_dis=’0’. In this case, after the
ACCD_X_LSB has been read, the value in the ACCD_X_MSB register is locked until the
ACCD_X_MSB has been read. This condition is inherently fulfilled if a burst-mode read access
is performed. Acceleration data may be read from register ACCD_X_LSB at any time except
during power-up and in DEEP_SUSPEND mode.
Name
0x02
ACCD_X_LSB
Bit
7
6
5
4
Read/Write
R
R
R
R
Reset
Value
n/a
n/a
n/a
n/a
Content
acc_x_lsb<5:2>
Bit
3
2
1
0
Read/Write
R
R
R
R
Reset
Value
n/a
n/a
n/a
n/a
Content
acc_x_lsb<1:0>
undefined
new_data_x
acc_x_lsb<5:2>: Upper 4 bits of least significant 6 bits of acceleration read-back value; (two’s-
complement format)
acc_x_lsb<1:0>: Lower 2 bits of least significant 6 bits of acceleration read-back value; (two’s-
complement format)
undefined: random data; to be ignored.
new_data_x: ‚0’: acceleration value has not been updated since it has been read out last
‚1’: acceleration value has been updated since it has been read out last