ESP_Lvxinyue wrote: ↑
Wed Dec 19, 2018 8:34 am
prdinesh wrote: ↑
Tue Dec 18, 2018 6:41 pm
What is the difference between ESP32-WROVER and ESP32-WROVER-B modules?
Does ESP32-WROVER-B has more PSRAM than ESP32-WROVER?
They both have 8 MB PSRAM. ESP32-WROVER has PSRAM that operates at 1.8 V and can support up to 144 MHz clock rate.
ESP32-WROVER-B has PSRAM that operates at 3.3 V and can support up to 133 MHz clock rate. ESP32-WROVER-B is also available with custom flash sizes of 8 MB or 16 MB. More variants can be found here: https://www.espressif.com/sites/default ... ion_en.pdf
I'm not sure if this is always true. For example, I have an ESP-WROVER-KIT V3 with an ESP32-WROVER module that only appears to have 4MB of PSRAM. I also have an ESP-DevKitC V4 with an ESP32-WROVER-B module which has 8MB of PSRAM.
In menuconfig "Component config > ESP32-specific > SPI RAM config > Type of SPI RAM chip in use" there are three options:
- (X) Auto-detect-
- ( ) ESP-PSRAM32 or IS25WP032
- ( ) ESP-PSRAM64 or LY68L6400
The fact that there are options for 4 MB (ESP-PSRAM32) and 8 MB (ESP-PSRAM64) indicates to me that there are modules with 4 MB of PSRAM and the ESP32-WROVER on my ESP-WROVER-KIT V3 appears to be one of these modules.