STM32 MCUs products

Resolved! Confusion with MDF and its SPI/Manchester setting

Hi all,We are trying to wire a microphone to the STM32U585. The microphone (T5838) outputs PDM and takes a clock as input.As far as I understand, the MDF peripheral supports PDM interface (as stated in RM046, Rev 4, 39.1), so it is compatible with th...

Resolved! Stoping MDF (ADF) clock output

Greetings,I'm using a low power microphone and would like to turn it off when not in use. That is done by turning off the clock to microphone, which is generated in ADF as output clock. Stopping sample acquisition (either by TRGO using window mode ac...

In theory, you can use all 26 bit of the STM32U MDF in the CIC stage. In practice, I recommend to stay < 25 bit to avoid artifacts and saturation.

Resolved! On the STM32U5xx, how many cycles does the MDF need to process a sample?

In other words, what is the relation between F_RS (and possibly F_PCM) and mdf_ker_clk in DFLT? I use every block in DFLT: ADC1 -> DFLT (CIC, offset, scale, RSFLT, HPF, INT) The reference manual mentions only the RSFLT block with up to 24 ticks, but ...

Resolved! Is there a simpler way to compute the gain factor in the SCALE stage of the MDF?

To me, it looks like each gain step shifts by "half" a bit, so we could compute the gain asfloor((DSfilt - DScic)*2);e.g. with RSFLT as target and Sinc5/Dec5 + 14bit ADC1:floor((22 - 25.6)*2) = -7;