Datasheet

Preliminary Data Sheet
BMA400
Page 64 /
Confidential
BST-BMA400-DS000-00 | Version 0.1 | November 2017 Bosch Sensortec
© Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to 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 (0x09) ACC_Z_MSB
DESCRIPTION: Register for accelerometer data. The ACC_X_LSB-ACC_Z_MSB registers contain
the latest data for x, y and z axis of accelerometer.
A read operation on the register ACC_X_LSB-ACC_Z_MSB resets the data ready bit.
RESET: 0x00
DEFINITION (Go to register map):
Name
Register (0x09) ACC_Z_MSB
Bit
7
6
5
4
Read/Write
n/a
n/a
n/a
n/a
Reset Value
0
0
0
0
Content
reserved
Bit
3
2
1
0
Read/Write
R
R
R
R
Reset Value
0
0
0
0
Content
acc_z_11_8
acc_z_11_8: msb of accelerometer z-axis data
acceleration is obtained by the following operations:
acc_x/y/z = acc_x/y/z_7_0 + 256*acc_x_11_8
if(acc_x/y/z> 2047) acc_x/y/z=acc_x/y/z-4096
Register (0x0A) SENSOR_TIME0
DESCRIPTION: the register contains the sensor time
RESET: 0x00
DEFINITION (Go to register map):
Name
Register (0x0A) SENSOR_TIME0
Bit
7
6
5
4
Read/Write
R
R
R
R
Reset Value
0
0
0
0
Content
sensor_time_7_0
Bit
3
2
1
0
Read/Write
R
R
R
R
Reset Value
0
0
0
0
Content
sensor_time_7_0
sensor_time_7_0: The internal sensor time is calculated using the formula
sensor_time=(sensor_time_7_0 +
256*sensor_time_15_8+65536*sensor_time_23_16 )*312.5us
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Confidential and under NDA