Figure 8. STEV
AL-STWINBX1 - overview of the sensing components
The motion sensors communicate with the STM32U585AI microcontroller via SPI in order to accommodate the
high data rates, whereas the magnetometer and environmental sensors communicate via I²C. The suitably filtered
signal from the IMP23ABSU analog microphone is amplified by a TSV912 op-amp and then sampled by the
internal 12-bit ADC of the MCU. The signal from the digital microphone is directly managed by the audio digital
filter (ADF) interface of the MCU.
Figure 9. STEV
AL-STWINBX1 - sensors on the top side
UM2965
Functional blocks
UM2965 - Rev 1
page 6/58
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