LIS2DW12: FIFO-Threshold-Interrupt Jitters at 1.6kHz

[Loris Wyss]

Hello ST-Community!

When I'm using the LIS2DW12 at ODR=1.6kHz, the Interrupt for reaching the FIFO-Threshold is jittering with 1/ODR, but only if the threshold is greater than 12. If it's less or equal, everything is working fine.

The buffer-Mode is set to FIFO-Mode, but this behaviour also occurs in Continous-Mode.

The Power-Mode is set to High-Performance/Low-Noise.

The Interrupt is routed to the INT1-Pin

The two images show the rising edge on the pin INT1. The time between the two cursors "a" and "b" is 624us (almost 625us), which would equal to 1/ODR (1/1600 = 625E-6)

As written, this only happens if ODR is set to 1.6kHz and the FIFO-Threshold is greater than 12.

Does anyone have some further informations regarding this issue?

Thanks in advance for your answers!

Greetings,

Loris

[Eleon BORLINI]

Hi @Loris Wyss​ , I confirm Martin contacted me, asked for details and I explained him the status of my analysis. I also asked him if I had to ship the board, but he didn't get me a feedback on this point. However, I'll ship it to him tomorrow since you asked me to do so (I did't understand if you already shipped him another board or not). Regards

[Loris Wyss]

Hi @Eleon BORLINI​ 

Thanks for your answer.

No, I didn't ship another Board, so thanks for your offer to ship the board to Martin.

Regards,

Loris