ESP32-S2 Flash

[sumit809]

I'm using new ESP32-S2 for my next design. My main MCU will be communicating with ESP32-S2 via UART using AT Commands.
In the hardware design guidelines, it is written that the SPI Flash is Compulsory (PFA).

So my question is, since I will be communicating using AT commands and will not be loading code in it, is it really necessary to add SPI flash in my schematics?

Thanks!
Sumit

[Sprite]

There is nothing in the ESP32-S2 chip itself that can interpret AT commands; you need the flash because the AT command interpreter needs to be uploaded there.