Can the SPI run at another voltage apart from VDD?

[MMars.1]

The data sheet isn't specific, apart from one diagram Figure 13 that shows IO's box with an arrow from VDD that then connects to a level shifter to the core domain.

Please advise. A real handy feature would be to alternative voltage IO for the SPI's.

[waclawek.jan]

Which STM32?

> The data sheet isn't specific,

GPIO levels apply to all IO, except where explicitly noted otherwise.

> A real handy feature would be to alternative voltage IO for the SPI's.

Some STM32 have a group of IO supplied from a separate VDDIO2 pin.

JW

[MMars.1]

Thank you.

I wrote in in the original question but they cropped it to STM32 MCU's..

Its the STM32H755xI.

🙂

[waclawek.jan]

Who cropped it and where's the original question?

According to 'H755 DS, there's no VDDIO2 but there appears to be a group of pins supplied by VDD33USB, _u suffixed in STM32H755xI pin/ball definition table, which maybe can be used at different voltage if USB is not used.

JW