MMA8652FC motion detection interrupt with HPF enabled

carlodipasquale — Tue, 03 Feb 2026 21:18:26 GMT

Good morning

I have many interrupts, as if HPF filter is bypassed (see log file annexed)

If I see acceleration data, they are filtered correctly (see Z axis).

What's wrong with my settings?

Carlo Di Pasquale

Original Attachment has been moved to: Motion_test.txt.zip

Re: MMA8652FC motion detection interrupt with HPF enabled

TomasVaverka — Mon, 24 Nov 2014 10:04:00 GMT

Hi Carlo,

The motion detection function is an analysis of low-pass filtered data only, even if the high-pass filter is enabled (HPF_OUT = 1). I would recommend using the transient detection function instead as it analyzes high-pass filtered data unless the HPF_BYP bit is set. For more information on the transient detection function including example register setting please refer to the AN4071.

I hope it helps.

Regards,

Tomas

PS: If my answer helps to solve your question, please mark it as "Correct" or “Helpful”. Thank you.

topic MMA8652FC motion detection interrupt with HPF enabled in Sensors

MMA8652FC motion detection interrupt with HPF enabled

Re: MMA8652FC motion detection interrupt with HPF enabled