ESP32 Forum

I hope this message finds you well. I have been reviewing the ESP32-S3 documentation and came across a note indicating that GPIO35, GPIO36, and GPIO37 are reserved for internal communication between the ESP32-S3 and the SPI flash/PSRAM memory, rendering them unavailable for external use [source: https://docs.espressif.com/projects/esp ... ng-started] also in datasheet page no: 12[https://www.espressif.com/sites/default ... eet_en.pdf].

Since we are utilizing 2MB PSRAM in our project, I am concerned that this may affect our GPIO mapping. Specifically, I see that we have assigned GPIO35,GPIO36 and GPIO37 custom functionalities.
Could anyone confirm whether using these GPIOs will impact our setup given their designation for internal communication?

Thank you for your assistance!

The datasheet specifically states: "For modules with Octal SPI PSRAM, i.e., modules embedded with ESP32-S3R8 or ESP32-S3R16V,
pins IO35, IO36, and IO37 are connected to the Octal SPI PSRAM and are not available for other uses". Furthermore, Table 1 in the datasheet specifically specifies the N8R2 has quad SPI RAM, so you should be good.

Thanks @ESP_Sprite