If you're using the ESP-IDF SPI driver, you may want to look at SPI_DEVICE_CLK_AS_CS. (If not, it's actually hardware functionality, you can also find a corresponding bit in the register descriptions.)


Thanks for the reply!
I checked, and it looks like there’s also a #if SOC_SPI_AS_CS_SUPPORTED ...

Hi everyone,

I’m working on an ESP32-S3 project where I need to communicate with multiple ADCs through isolation.
Each ADC uses a 3-wire SPI interface (no CS), and I’d like to select each ADC by switching which GPIO outputs the SPI clock (SCLK) signal.
The goal is to reassign the SCLK pin between ...