How does DCMI work with MCU & camera on different voltage levels?

[f3l1xa88077]

Hiya. I'm having some trouble understanding how an STM32 MCU communicates with an image sensor via DCMI if they operate on different voltages.

My STM32U5Gxxx operates on 3V3, whereas my selected image sensor has its VDDIO at 2V8 (max input of 3V1). How can I make sure that all the signals I send to the sensor are at 2V8 instead of 3V3? Is there a certain VDDIOx pin to be tied?

Are there any reference designs or schematics that are helpful?

[KDJEM.1]

Hello @f3l1xa88077 ;

 

I recommend you to use external level shifters for voltage level translation between the STM32 MCU and peripheral connected to the DCMI (such as image sensors at 2.8V).

 

Thank you.

Kaouthar

[Andrew Neil]

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@f3l1xa88077 wrote:

My STM32U5Gxxx operates on 3V3, whereas my selected image sensor has its VDDIO at 2V8

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Why not just run your STM32 at 2V8, then ?

[KDJEM.1]

Hello @f3l1xa88077 ;

 

Is your question answered?

If yes, please click on Accept as Solution on the reply which answered your question.

 

Thank you.

Kaouthar