Hello! Is the acceleration of FX870911 not interrupted to wake up MCU? How should it be configured?

[2445202944]

In the development of FX870911, it is found that only the acceleration can be polled to detect whether the vehicle is in motion. In the document, the acceleration can produce interrupt wake-up MCU independently, but there is no specific method in the document. How can I configure acceleration independent interrupt to wake up MCU?

[reyes]

Hi,

It is not possible to wake up the MCU on acceleration interrupt. The only way to access the accelerometer is to wake up the MCU and trigger an acceleration measurement.

For applications in which a movement should wake up the MCU on interrupt, it is possible to add an external low-power motion detection accelerometer (like the MMA8451) which would send a signal via GPIO to the FXTH to trigger the wake up. Using the KeyBoard Interrupt (KBI) the FXTH can be woken up on GPIO interrupt.

But this requires to add an external accelerometer.

Have a great day,

Jose
TIC

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