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Woody
Associate
April 22, 2025
Question

STM32U595 fmc dma burst size limit of 8 bytes

 For STM32U595, I use DMA for the FMC interface, and the maximum burst size is only 8 bytes,
How can I increase the burst size?

 

fmc_burst_timing.png

dma_config.png

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1 reply

Amel NASRI
Amel NASRI
ST Technical Moderator
April 30, 2025

Hi @Woody ,

Based on this table from AN5593, the maximum burst length depends on GPDMA used channel and data width:

AmelNASRI_0-1746031226472.png

In STM32CubeMX interface, Data Width & Burst Length are parameters that you can configure once you select the channels to use, on channel dedicated tab.

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