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BMA400 Datasheet(PDF) 99 Page - Bosch Sensortec GmbH

Part # BMA400
Description  3-axes ultra-low power accelerometer
PDF  121 Pages
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Manufacturer  BOSCH [Bosch Sensortec GmbH]
Direct Link  https://www.bosch-sensortec.com
Logo BOSCH - Bosch Sensortec GmbH

BMA400 Datasheet(HTML) 99 Page - Bosch Sensortec GmbH

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Bosch Sensortec | BMA400 Data sheet
99 | 121
Modifications reserved | Data subject to change without notice
Document number: BST-BMA400-DS000-13 Revision_2.2_012025
The device supports a command set to trigger certain activities and state transitions of the
device. The command interpreter is connected to register cmd. A command is invoked if the
corresponding Opcode is written to the cmd register.
Writing an undefined command to register cmd has no effect and ERR_REG.cmd_err=’0’ in
this case.
The device implements a simple handshaking mechanism to signal its readiness for accepting
a new command. Prior to writing a new command to the cmd register the user must read the
status bit STATUS.cmd_rdy:
cmd_rdy = ’1’: device is ready to accept a command
cmd_rdy = ’0’: a command is being executed, any new command is ignored
cmd_err is set to ‘1’ when command execution failed. cmd_err is reset to ‘0’ if the last command
execution was successful. This is a clear-on-read bit.
After the softreset command has been invoked, status and error register are updated after
Tst_up.



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