feedc0de/esp-idf
1
0
Fork 0
forked from espressif/esp-idf
Code Pull Requests Activity

docs: Add more content about 32bits address flash usage

Browse Source
This commit is contained in:
Cao Sen Miao
2023-04-14 11:39:12 +08:00
parent c7053641bc
commit db4375e9e6
1 changed files with 8 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
docs/en/api-reference/peripherals/spi_flash/spi_flash_optional_feature.rst
View File

@@ -123,3 +123,11 @@ Flash Chips List:
1. W25Q256
2. GD25Q256
.. important::
Over 16 MBytes space on flash mentioned above can be only used for `data saving`, like file system. If your data / instructions over 16 MBytes spaces need to be mapped to MMU (so as to be accessed by the CPU), please enable the config `IDF_EXPERIMENTAL_FEATURES` and `CONFIG_SPI_FLASH_32BIT_ADDRESS` and read the limitations following:
1. This option only valid for 4-line flash. Octal flash doesn't need this.
2. Only MMU on ESP chip that supports mapping to a range over 16MB memory supports this config. (Only ESP32S3 supports this up to now)
3. This option is experimental, which means it can't use on all flash chips stable, for more information, please contact Espressif Business support.