BMA456 Triple Tap

[brain_tom]

Hello
We are going to make a product using BMA456's Triple Tap.
However, while checking the function in Development Desktop 2.0, there is a case where the interrupt occurs twice in double tap and triple tap.
Is this normal?
Are the values I set wrong?

Accelerometer Setting
ODR	200Hz
Bandwidth	normal mode
Filter Performance	Perfomance Optimized
Range	4g

[BSTRobin]

Hi brain_tom,

The interrupt only occurs once when triple tap.

Latest DD2.0 software run with BMA456W configuration file, couldn't find triple tap setting.

There are different BMA456 configuration file which support different features.

BMA456W

• Any motion
• No motion
• Step detector
• Step counter
• Step activity
• Tap
  • Single tap
  • Double tap

 

BMA456H

• Any motion
• No motion
• Step detector
• Step counter
• Step activity
• Auto low power
• Tap
  • Single tap
  • Double tap
  • Triple tap

 

BMA456MM

• Any motion
• No motion
• Orientation
• High-g
• Low-g
• Significant motion
• Auto low power
• Tap
  • Single tap
  • Double tap
  • Triple tap

 

BMA456AN

• Any motion
• No motion

https://github.com/boschsensortec/BMA456-Sensor-API

Could we know your applicaton? If it is hearable application, you could use BMA456H configuration file which support single tap, double tap, triple tap.

[brain_tom]

hello, BSTRobin Thanks

I used the BMA456MM configuration file

What is the difference between BMA456H and BMA456MM configuration file?

[BSTRobin]

Hi brain_tom,

BMA456H and BMA456MM provide a combination of different features, and as you can see from previous comments, users choose to use them based on whether the application requires these features.

[brain_tom]

Hi.  BSTRobin

In the application note, it is as follows.

I have a few questions for you.
1. When using a multi-tap, the mode is supposed to be changed. Which of the performance mode and low power mode should be used?
2. Is there only a difference in current consumption between performance mode and low power mode?
Are there any other differences?
3. Why is it necessary to change the ODR to minimum 200hz when using a multi-tap?
4. Does the multi-tap algorithm behave differently or have different accuracy depending on the power mode?