Datasheet

Data Sheet
BMA456
Page 40
BST-BMA456-DS000-01 | Version 1.1 | October 2017 Bosch Sensortec
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BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.
Double tap / Tap detection
The gesture “Tap / Double tap” can be enabled by FEATURES_IN.tap_doubletap.settings.enable.
The detection is done by measuring the acceleration on z-direction.
By default double tap detection is enabled. To enable single tap detection (and disable double tap),
you can configure the parameter: FEATURES_IN.tap_doubletap.settings.single_tab_en – 1 bit –
flag.
The detection sensitivity can be customized using the register
FEATURES_IN.tap_doubletap.settings.sensitivity. The sensitivity range is from 0 (high) to 7 (low).
How to perform the gesture ideally:
1. Use your index finger to tapon the device slightly harder than how you touch a button on a
touchscreen.
2. Tap again directly, if “Double tap” detection is enabled.
3. Wait for half a second.
Configuration settings
1. FEATURES_IN.tap_doubletap.settings.enable– enables/disables the Wakeup feature.
2. FEATURES_IN.tap_doubletap.settings.sensitivity– configures the detection sensitivity which
ranges from 0 (high) to 7 (low).
3. FEATURES_IN.tap_doubletap.settings.single_tab_en- enables single tap detection. By default,
double tap is enabled.