GPIOs for LCD with ESP32-S3 via SPI

[ManelCS.]

I want to use an LCD screen with an esp32-s3 with SPI, the question is, should I use the gpios recommended by SPI_HOST (HSPI VSPI) or can I use others.

[ahsrabrifat]

Hello, which specific LCD are you planning to use? Any link, datasheet or pics?

[ManelCS.]

https://newhavendisplay.com/es/2-4-tft- ... s-display/
https://newhavendisplay.com/content/spe ... F-CSXP.pdf

[eriksl]

You can use either SPI2 or SPI3 (aka VSPI and HSPI). The only difference (see documentation!) is:

When using SPI2 AND all pins are bypassing the GPIO-MUX (i.e default/native settings) you can drive the SPI pins at 80 MHz. In all other cases (using SPI3 or using one or more pings running through the GPIO-MUX), you're limited to 40 MHz operation. Which isn't such a big deal as most (at least the one I've been using) LCD's can't run beyond 40 MHz anyway.

So don't worry, it will be ok.