Could we used the SPI interface control the 5V LED Driver IC?STM32L412's VCC is 3.3V, SPI's pins are FT_f type.LED Driver IC's VCC is 5V.Is there anything that needs extra attention?Will there be problems with SPI operation?

Associate II

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STM32L412 : Could we used the SPI interface control the 5V LED Driver IC.

Could we used the SPI interface control the 5V LED Driver IC?

Is there anything that needs extra attention?

Will there be problems with SPI operation?

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TDKBest answer

It should work, provided pins are correctly configured.

You need to ensure +5V is never applied when the chip is not powered (VDD=0).

What LED driver? Make sure that 3.3V is guaranteed to be logic high.

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TDKBest answer

It should work, provided pins are correctly configured.

You need to ensure +5V is never applied when the chip is not powered (VDD=0).

What LED driver? Make sure that 3.3V is guaranteed to be logic high.

"If you feel a post has answered your question, please click ""Accept as Solution""."

Associate II

Hi TDK,

Thanks a lot.

The LED Driver is IS31FL3743B.

The Vih min is 2.4V.