A problem and the solution: PSRAM was not working

[renatoianhez]

I was testing a new ESP32-S3 WROOM-1 N16R8 board and noticed that I could not, in any way, make the board's PSRAM work in a simple radio sketch, using Arduino IDE. When the PSRAM was set in the settings, the program did not work. When it was turned off, the radio worked, but it was restarting every 30s. After a whole day of research on the Internet, I discovered that on these N16R8 boards I cannot use pins 35, 36 and 37, which are reserved for the PSRAM. And these were the pins that I was connecting the PCM5102 board to. Reallocating them to pins 38, 39 and 40, everything works perfectly!

Edit: Pin 45 must also be reserved