ESP32 Forum

Hi , I find the sections relating to external Flash/SRAM a little confusing

ESP32 Datasheet - section 3.4.3 "says up to 8 Mbytes of external flash are memory mapped into the CPU code space" and "up to 1 Mbyte external flash and SRAM are memory mapped into CPU data space"

ESP-WROOM-32 section 3.2 "says up to 16 Mbytes of external flash are memory mapped into the CPU code space" and "up to 8 Mbyte of external SRAM are memory mapped into CPU data space"

I would cut and paste the relevant sections here but they are not usable for that purpose from the current PDF's

Could we get some clarification on which is the correct numbers/types mapped?

Glenn

I has been a month since I posted this - Is there any more info available now? Soon?

Yes, I think the datasheet contains old info. The next version of the techdoc should contain the MMU chapter as well, where you can read the technical spec in detail.

From what I can see there, we support 16MiB of flash memory. This can be mapped to 4MiB of D-port address space, and slightly less than 12MiB of I-port address space.

We support up to 8MiB of SRAM, mapped to a 4MiB D-port window.

Hello,

What Kind of Flash and Ram is supported. SPI ?

thanks Arnold