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User_of_Sensor
Associate
February 5, 2020
Question

High pass filter data or low pass filter data for Wake up feature of IIS2DLPC?

  • February 5, 2020
  • 1 reply
  • 1426 views

I am testing IIS2DLPC wake up feature for interrupt generation. When i want to use the wake up feature with high pass filter data instead of offset. Should i enable FDS bit in CTRL6? It is not clear that in the description of the wake up feature. What does it mean by high pass filter data when there is no setting to select high pass filter data path.

Thank you in advance!

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1 reply

Eleon BORLINI
ST Employee
February 21, 2020

Hi @User_of_Sensor​ , thank you for the reporting. Yes, in order to implement the wake-up feature apply the HP filter, so that you can exclude the gravity vector and the very low frequencies disturbance from the event recognition, and as you pointed out you should enable the HP filter by setting the FDS bit = 1. Regards