ESP32 Forum

Yes, important info to keep straight

SD pins are for SDIO slave function
HS1 pins are for SDIO/MMC master function
SPI pins are for SPI/QPI

Need warning: Do not try to make QPI device into SDIO device (by imagination)

Actually would be helpful to have SPI_IO0-3 labels too

WiFive wrote: ..
Need warning: Do not try to make QPI device into SDIO device (by imagination)
..

where you know my imagination thinking?

WiFive wrote: Actually would be helpful to have SPI_IO0-3 labels too

+1

btw.
now i know, why the most did wrong on SD Card implemention on start.
they did think this silkscreen is for SD Card too - ( little confusing ) but now we know.

best wishes
rudi

update
=======

ESP-PSRAM64 & ESP-PSRAM64H

ESP-PSRAM64 and ESP-PSRAM64H are 64 Mbit serial pseudo SRAM devices that are organized in 8Mx8 bits.
They are fabricated using the high-performance and high-reliability CMOS technology.
ESP-PSRAM64 operates at 1.8V and can offer high data bandwidth at 144 MHz clock rate, while
ESP-PSRAM64H operates at 3.3V and can support up to 133 MHz clock rate. Note, however, that
burst operations which cross page boundaries have a lower max input clock frequency at 84 MHz.

Both of the PSRAM devices can be accessed via the Serial Peripheral Interface (SPI). Additionally, a
Quad Peripheral Interface (QPI) is supported if the application needs faster data rates. The devices
also support unlimited reads and writes to the memory array.

Details taken from the Datasheet [ SRC ]
best wishes
rudi

btw:
have a note about MP WROVER and update
ESP32-WROVER 64-Mbit PSRAM*
ESP32-WROVER-I 64-Mbit PSRAM*

best wishes
rudi

edit/again:
saw it - did post the ESP-pSRAM64/H datasheet already -
ok then this theme on ESP64 is completly now @WiFive
best wishes
rudi

Hi Folks,

ESP-PSRAM64H was found on Espressif's "Chip7 2-2-A" beta board / module



best wishes
rudi