BMA423 datasheet(19/129 Pages) BOSCH

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Data Sheet

BMA423

Page 19

BST-BMA423-DS000-00 | Version 1.0 | August 2017

Bosch Sensortec

BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.

Note: Specifications within this document are subject to change without notice.

The auxiliary sensor functionality is supported only when the auxiliary interface is connected for the

auxiliary sensor operation. If the auxiliary interface is not used for auxiliary sensor operation, then the

auxiliary sensor interface must remain disabled by setting PWR_CTRL.aux_en=0b0 (default).

To change the power mode of the auxiliary sensor, both the power mode of the auxiliary interface and

the auxiliary sensor part needs to be changed, e.g. to set the auxiliary sensor to suspend mode:

 Set the auxiliary sensor interface to suspend in Register PWR_CTRL.aux_en=0b0. Changing

the auxiliary sensor interface power mode to suspend does not imply any mode change in the

auxiliary sensor.

 The auxiliary sensor part itself must be put into suspend mode by writing the respective

configuration bits of the auxiliary sensor part. The power mode of the auxiliary sensor part is

controlled by setting the BMA423 auxiliary sensor interface into manual mode by

AUX_IF_CONF.aux_manual_en=0b1 and then communicating with the auxiliary sensor part

through the BMA423 registers AUX_RD_ADDR, AUX_WR_ADDR, and AUX_WR_DATA. For

details see Chapter 4.8.

BMA423 Datasheet(PDF) 19 Page - Bosch Sensortec GmbH