MicroPython_ESP32_psRAM_LoBo icon indicating copy to clipboard operation
MicroPython_ESP32_psRAM_LoBo copied to clipboard

Published 20 hours ago • verified publisher icon loboris

SD Card

Open bdespatis opened this issue 6 years ago • 1 comments

Hi,

I did not see much about it, but I can't make it work in SD_Mode 1_Line or SPI. I used to be able (April), but now I am not. Can it be a problem with WROVER vs WROOM voltage psram detection ?

Let me know if you have more information.

Tested on Olymex Evaluation Board with SD Card too.

Our design is 1_Line, no hardware pull-up resistors.

Regards, Benoit Despatis, P.Eng.

bdespatis avatar Dec 07 '18 21:12 bdespatis

I've designed couple of custom boards with WROVER and WROOM modules, all using SD Card in 1-line mode. In my design, external 10K pull-ups are used on all sdcard lines (except CLK) and I've never had any issue. I'll try to assemble one board without external pull-ups and test it when I'll find some free time.

loboris avatar Dec 17 '18 11:12 loboris