ESP32 Forum

Hello.
I need a connection between the Host system and Slave (ESP32S3) through SDIO interface.
Seems there is no any problem, but my host system operates SDIO only at 1.8V (3.3V is missing).

I was trying find any information, but I couldn't (no any clear info like strapping pins or something).
Does ESP32S3 supports 1.8V operations on SDIO?

Thanks.

According to the ESP32 datasheet, the minimum IO voltage is 2.2V, so my opinion is that to use 1.8V SDIO, you may want to add a bidirectional level shifter that can be made with a couple of N-channel MOSFETs.

Due to the number of lines, an integrated circuit is a better solution, you can search for SDIO voltage translator and will get several results
MOSFET are more suitable for I2C.