Using External Memory on ESP32-WROOM

LucasSossai
Posts: 4
Joined: Tue Dec 04, 2018 5:45 pm

Using External Memory on ESP32-WROOM

Postby LucasSossai » Tue Sep 17, 2019 2:03 pm

Greetings everyone, my company is developing a project where we need external memory for the ESP32. I read the documentation and developed a Schematic that I would like to validate here if possible. Here is the img:
SCH.PNG
SCH.PNG (38.8 KiB) Viewed 198 times
I made the connections based on the documentation https://docs.espressif.com/projects/esp ... l-ram.html but there is a detail that I didn't understand 100%:
Doubt.PNG
Doubt.PNG (52.2 KiB) Viewed 198 times
This means that if I use other PSRAM than ESP-PSRAM32 I can't use API's to access it?
The memory that I found suitable for the project is this one : https://br.mouser.com/datasheet/2/198/I ... 488088.pdf

ESP_Sprite
Posts: 2832
Joined: Thu Nov 26, 2015 4:08 am

Re: Using External Memory on ESP32-WROOM

Postby ESP_Sprite » Wed Sep 18, 2019 3:18 am

That RAM indeed is not supported. Suggest you switch to an ESP32-Wrover as it already supported RAM built in.

WiFive
Posts: 2687
Joined: Tue Dec 01, 2015 7:35 am

Re: Using External Memory on ESP32-WROOM

Postby WiFive » Wed Sep 18, 2019 5:10 am

Especially considering the cost of that ram chip is more than the whole wrover module.

LucasSossai
Posts: 4
Joined: Tue Dec 04, 2018 5:45 pm

Re: Using External Memory on ESP32-WROOM

Postby LucasSossai » Wed Sep 18, 2019 5:54 pm

Thank you for you replies @WiFive and @ESP_Sprite, probably our project will use WROVER. If in the place of the SRAM I suggested, I used the official ESP-PSRAM32 from espressif, the design would be correct?

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