Ritesh wrote:We had finalized to use 1.8 v supported external memory and also finalized to change default memory as external memory instead of internal memory.
So, with that we can use external memory as well as 4 MB PSRAM for more memory allocation purpose.
Let me know if need any help regarding this as e had already did it and started development using that configurations
How have you handled the 1.8v issue? Presumably using an external regulator 3.3v->1.8v for the external 1.8v flash. But, what about the CS line? On WROVER, all the VDIO domain GPIOs are used, so have to use a 3.3v CS line and level converter down to 1.8v. That is the approach we are using, but slightly concerned the propagation delay on the 3.3v->1.8v level converter will be too slow (5ns approx) for 40Mhz operation.
I _really_ wish Espressif would offer 16MB internal flash version of WROOM-32 and WROVER. 4MB is fine for one App, but when using the OTA feature, that reduces to 1MB (factory + 2x OTA partitions).