st6g3244mebjr usage on SensorTileBox.Pro

[Gerva]

Hello,

 

I would like to interface STM32U5G9 with SD Card. Looking at SensorTileBox.Pro schematic, I see that an SD Card Driver (st6g3244mebjr) is placed in the middle. What is the added value in using it?

 

Thank you

[Peter BENSCH]

The ST6G3244MEBJR (U16) is used as a level translator from 1.8V to 3.0V.

Does it answer your question?

Regards
/Peter

[Gerva]

That's ok.

I double checked the topic and, as the SD Card initial communication voltage level is at 3.3 V (only when switching to UHS-I changes to 1.8 V), we need for a certain initial time to shift communication to 3.3V. In SensorTileBox.Pro the STM32U5 is powered at 1.8 V. I hoped that the voltage level change could be managed directly by STM32U5, but it is stated the an external voltage level translator is needed.

Thank you