Constant data is stored in flash by default, and can be accessed on byte, half-word and word basis. You need to use 'const' qualifier in your program to mark the data constant. Internally, data in cache is mapped into the CPU address space via a transparent cache. See the chapter on Flash MMU in the...

Please take a look at this msys2 issue, there is a workaround mentioned which you may try.
https://github.com/Alexpux/MSYS2-packages/issues/735

The documentation mentions that SDMMC driver doesn't support SPI mode. The flag for SPI mode is reserved for future expansion.

One can, for example, connect VDD_SDIO to external 3.3V supply. In this case the internal regulator will be disabled automatically. The only problem with this design is that the flash chip doesn't get automatically powered down before deep sleep, so a shutdown command needs to be sent to it (and the...

For D2WD, power all rails except VDD_SDIO at 3.3V. For VDD_SDIO, select 1.8V voltage of the internal regulator by strapping GPIO12. Since VDD_SDIO will be at 1.8V, it must not be connected to the external 3.3V supply.

There's shouldn't be a limitation related to usage of sdmmc driver from different task, as long as you use it only from one task at a time. Can you post the code to reproduce the issue?

What do you mean by "i'm not finding any into my idf"?
If you are getting some error when running make menuconfig, can you post the error?
If you don't want to configure the unit-test-app in a specific way, you can run make defconfig instead, which will select default configuration settings.

Instead of connecting IO2 and IO0, can you drive each of them to low logic level when in download mode? This way both pins will be low (as required by bootloader) but will still be allowed to work independently when not in download mode. Here's a part of the schematic of WROVER-KIT where we have add...

The one from taobao doesn't have an auto reset circuit (or there's something wrong with it) even though it has the cp2102 on it.

For RTC IOs you can use rtc_gpio_hold_en function.

For digital IOs there is a RTC_CNTL_DG_PAD_FORCE_HOLD bit which forces all pads to hold their state.