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MMA8652 Pulse Filtering Settings

Question asked by Michael Ross on May 6, 2019
Latest reply on May 9, 2019 by Jose Alberto Reyes Morales

I am trying to set up pulse detection on an MMA8652 and have come across an ambiguity in the datasheet.

 

The description of register 0x0F HP_FILTER_CUTOFF says that bit 5 bypasses the High-pass Filter for Pulse processing when set, and bit 4 enables the Low-Pass filter when set. I can guess that when bit 5 is set and bit 4 is cleared, the raw sensor data will be used for the pulse processing. What isn't obvious though is what happens if bit 5 is cleared and bit 4 is set. Is that simply an invalid state, or does one of the HPF or the LPF take priority?

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