External sRAM and flash connection with ESP32-PICO-D4

[habibh]

Hello Group Members,

I want to connect external sRAM and flash with ESP32-PICO-D4 in my project. Can any one recommend how can I connect sRAM and flash with ESP32-PICO-D4 while I also need the functionality of Ethernet RMII in my project.

I shall be thankful for valuable suggestions.

Regards:
Habib

[habibh]

Dear Group Members,

The data sheet of ESP332-PICO-D4 says that "Pins IO16, IO17, CMD, CLK, SD0 and SD1 are used for connecting the embedded flash, and are not recommended for other uses".

If I want to use an external flash with ESP32-PICO-D4 can I use the same pins as of integrated flash of ESP32-PICO-D4 with chip select different as shown in the following attachment ?

Regards:
Habib

[luca_inter]

hello habibh,
I would like use an external Flash memory to ESP32-Pico-D4, but I'm confused with the connections, please can you help me ?
thank you so much.
Best regards