Difference between revisions of "Core Coupled Memory (CCMRAM)"
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[[File:STM32F405 Bus Matrix.png|900px]] | [[File:STM32F405 Bus Matrix.png|900px]] | ||
</div> | </div> | ||
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| + | As a result, the [[CCMRAM]] can '''not''' be used with [[DMA]]. | ||
== Usage Examples == | == Usage Examples == | ||
* [[STM32 FreeRTOS|Using CCMRAM for FreeRTOS Heap]] | * [[STM32 FreeRTOS|Using CCMRAM for FreeRTOS Heap]] | ||
Revision as of 03:17, 14 November 2024
Some STM32 MCUs include a feature called CCMRAM (Core Coupled Memory), which is separate from the regular SRAM region.
According to the datasheet, the memory in STM32F405 is:
In the block diagram it is shown like this:
It is worth noticing a few things. As the name implies this RAM is connected directly to the MCU core but separate from the AHB bus matrix. Looking at the bus matrix:
As a result, the CCMRAM can not be used with DMA.